Apprenticeship Sponsor — page 13 of 20
5,826 businesses with an active “Apprenticeship Sponsor” credential — administered by the Department of Labor. State file of October 1, 2026.
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| Place | Business | Record | Credentials | Latest expiration |
|---|---|---|---|---|
| Southbury, CT | Mike O'Connell Electric, LLC | 93B4E1CE07 | Apprenticeship Sponsor | Jun 30, 2027 |
| Old Lyme, CT | MIKE SWANEY ELECTRIC, LLC | 0FE2E04DB4 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bridgeport, CT | Mike's Lock & Key, LLC | 948A18C8F4 | Apprenticeship Sponsor | Jun 30, 2014 |
| Enfield, CT | Mike's Plumbing & Heating LLC | FD9CF7BDD3 | Apprenticeship Sponsor | Jun 30, 2017 |
| Bridgeport, CT | Mike's Plumbing Services | 206D7905C5 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Bethel, CT | Mikell Electric LLC | 27270130B1 | Apprenticeship Sponsor | Jun 30, 2026 |
| West Haven, CT | Miks Kreations LLC | 33F90406F2 | Apprenticeship Sponsor | Jun 30, 2026 |
| Somers, CT | Miles Electric | FF9820BBB0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bridgeport, CT | Milestone Electric, LLC | 2FF7FE0E9E | Apprenticeship Sponsor | Jun 30, 2011 |
| Milford, CT | Milford Communications & Controls | BDE114CA3A | Apprenticeship Sponsor | Jun 30, 2009 |
| Milford, CT | Milford Electrical Contractors, Inc. | 5F7CF1DDED | Apprenticeship Sponsor | Jun 30, 2010 |
| Milford, CT | MILFORD HOSPITAL INC. | C50585C8DA | Public Charity-Exempt From Financial Requirements + 1 more | — |
| Milford, CT | Milford Mechanical, LLC | 6CEBB973C5 | Apprenticeship Sponsor | Jun 30, 2026 |
| Mystic, CT | Millas Heating & Cooling, LLC | 1CF78C0824 | Apprenticeship Sponsor | Jun 30, 2027 |
| Voluntown, CT | Millennium Electric, LLC | 9D0CB99EFD | Apprenticeship Sponsor | Jun 30, 2023 |
| Southington, CT | Millennium Electrical & Electronics, LLC | 53B9B91364 | Apprenticeship Sponsor | Jun 30, 2014 |
| Ridgefield, CT | Miller Electric, Inc. | 4885B89BB1 | Apprenticeship Sponsor | Jun 30, 2009 |
| Burlington, CT | MILLER FUEL LLC | 1F14AE5042 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| West Hartford, CT | Miller Plumbing, LLC | 8ACCE33C28 | Apprenticeship Sponsor | Jun 30, 2017 |
| East Haven, CT | Miller's Fuel Oil, Inc. | C32C10B33A | Apprenticeship Sponsor | Jun 30, 2010 |
| Danbury, CT | Milro Group | 58A42D4760 | Apprenticeship Sponsor | Jun 30, 2027 |
| Guilford, CT | Minuteman Electric LLC | 3024A890E1 | Apprenticeship Sponsor | Jun 30, 2020 |
| Bolton, CT | MINUTEMAN SECURITY & LIFE SAFETY | 60D5F68994 | Apprenticeship Sponsor | Jun 30, 2027 |
| Torrington, CT | Minutemen Plumbing & Heating, LLC | 5F5047F2AD | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Portland, CT | Mirabito Energy Mirabito Holdings Inc. | 8FCB9A5686 | Apprenticeship Sponsor | Jun 30, 2027 |
| Seymour, CT | Mirabito Energy Products | 99FF21FA93 | Apprenticeship Sponsor | Jun 30, 2026 |
| Bethel, CT | MIRACLE FARMS NURSERY COMPANY, INC. | 923ADED263 | Pesticide Application Business Registration + 2 more | Aug 31, 2027 |
| Plantsville, CT | Mirando Plumbing, LLC | 09004D9C81 | Apprenticeship Sponsor | Jun 30, 2015 |
| Enfield, CT | MISSION ELECTRIC LLC | 41AA5C68FE | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Easton, CT | Mitaly Electric, LLC | D1C1AE4D63 | Apprenticeship Sponsor | Jun 30, 2010 |
| Farmington, CT | MITCHELL & SONS ELECTRIC | 9CA7EA11DC | Apprenticeship Sponsor | Jun 30, 2017 |
| South Windsor, CT | MITCHELL FUEL CO INC MITCHELL HOME SERVICES | 1BEAADA78C | Home Heating Fuel Dealer + 3 more | Sep 30, 2027 |
| Plainville, CT | MIZZY CONSTRUCTION INC | A75BDA78D6 | Major Contractor + 1 more | Jun 30, 2027 |
| Middlebury, CT | MJ Enterprises Electrical Contr. Of CT, LLC | 6AC4B0D081 | Apprenticeship Sponsor | Jun 30, 2009 |
| Thomaston, CT | MJM Electric LLC | 827E85F835 | Apprenticeship Sponsor | Jun 30, 2027 |
| Wethersfield, CT | MJP Electrical Co., Inc. | 54A8558CB6 | Apprenticeship Sponsor | Jun 30, 2012 |
| Tolland, CT | MJS Electric | 9880E94D39 | Apprenticeship Sponsor | Jun 30, 2006 |
| Guilford, CT | MJS Mechanical Services LLC | 623F3877AA | Apprenticeship Sponsor | Jun 30, 2027 |
| Bloomfield, CT | MK North America, Inc. | 847A717315 | Apprenticeship Sponsor | Jun 30, 2022 |
| Wilton, CT | MLH-Plumbing & Heating | D9DC422C0D | Apprenticeship Sponsor | Jun 30, 2009 |
| Tolland, CT | MLJ Heating & Cooling, LLC | F298D9B4D1 | Apprenticeship Sponsor | Jun 30, 2020 |
| New Haven, CT | MM2 LLC | 118F89423E | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Cheshire, CT | Mobilio and Son Heating & Cooling, LLC | 01073CF58A | Apprenticeship Sponsor | Jun 30, 2024 |
| Monroe, CT | Mocarski Electric, LLC | 4F3A8FA04D | Apprenticeship Sponsor | Jun 30, 2020 |
| East Hartford, CT | Modeen's Electric, LLC | 2C094735F0 | Apprenticeship Sponsor | Jun 30, 2012 |
| Plymouth, CT | Modelcraft Company, Inc. | EFE97BAF33 | Apprenticeship Sponsor | Jun 30, 2027 |
| Pawcatuck, CT | Modern Barber and Shave, LLC | E0E5ADED25 | Apprenticeship Sponsor | Jun 30, 2024 |
| Enfield, CT | MODERN COMFORT MECHANICAL LLC | 276AB4C61F | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Stratford, CT | Modern Design Barbershop | 7B44AD3C95 | Apprenticeship Sponsor | Jun 30, 2020 |
| Killingworth, CT | Modern Electric & Lighting Design, LLC | 893C257A0A | Apprenticeship Sponsor | Jun 30, 2018 |
| Plainville, CT | Modern Electric, LLC | 1DDD5E170B | Apprenticeship Sponsor | Jun 30, 2027 |
| Cheshire, CT | Modern Electrical | D7A367041D | Apprenticeship Sponsor | Jun 30, 2026 |
| New Milford, CT | Modern Electrical Contractors, Inc. | A96AC3C1C2 | Apprenticeship Sponsor | Jun 30, 2007 |
| Milford, CT | Modern Heating and Air Conditioning | F0D0B4E960 | Apprenticeship Sponsor | Jun 30, 2027 |
| Farmington, CT | Modern Mechanical Systems Inc. | 2E9D7613C0 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Canaan, CT | MODERN PLUMBING & HEATING LLC | 4DF695D365 | Apprenticeship Sponsor | Jun 30, 2023 |
| East Hartford, CT | MODUGNO ELECTRICAL CONTRACTORS INC. | CF4D2B15C5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Plantsville, CT | MOHAWK NORTHEAST INC. | 3B855AC175 | Demolition Contractor + 3 more | Sep 30, 2027 |
| Mystic, CT | Mohegan Oil Company, Inc. | B7DB31620C | Apprenticeship Sponsor | Jun 30, 2011 |
| Newington, CT | MOJO HAIR SALON LLC. | FE2B0B548E | Apprenticeship Sponsor | Jun 30, 2027 |
| Danielson, CT | MOM AND POP PLUMBING & DRAIN SERVICES, LLC | FACC5A856B | Apprenticeship Sponsor | Jun 30, 2027 |
| East Berlin, CT | Momentum Solar, LLC | 39919F261E | Apprenticeship Sponsor | Jun 30, 2027 |
| Waterford, CT | Monahan Plumbing Inc | 247A7C0265 | Apprenticeship Sponsor | Jun 30, 2027 |
| North Branford, CT | Monico Electric LLC | 903B051352 | Apprenticeship Sponsor | Jun 30, 2026 |
| Monroe, CT | Monroe Electric, LLC | AD7E9FF60E | Apprenticeship Sponsor | Jun 30, 2020 |
| Ridgefield, CT | MONTANARI FUEL SERVICE | 5EBF6C9CD3 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Wilton, CT | Montanaro Electric, Inc. | 777C5E73F6 | Apprenticeship Sponsor | Jun 30, 2021 |
| New Haven, CT | MONTESSORI SCHOOL ON EDGEWOOD | F5B4073F5D | Child Care Center + 2 more | Apr 30, 2029 |
| Middlefield, CT | Monthei Brothers Electrical Contractors, Inc. | D769881339 | Apprenticeship Sponsor | Jun 30, 2017 |
| New Fairfield, CT | Moore Electric, LLC | 2343915B30 | Apprenticeship Sponsor | Jun 30, 2020 |
| Bloomfield, CT | Moore Plumbing & Heating, LLC | BA5698FFD4 | Apprenticeship Sponsor | Jun 30, 2007 |
| West Haven, CT | Mordente Electric Inc. | 43D614C0E4 | Apprenticeship Sponsor | Jun 30, 2009 |
| New Fairfield, CT | Moreira Electric, LLC | 69CBFA4E9E | Apprenticeship Sponsor | Jun 30, 2027 |
| Branford, CT | Morganti Electrical Contractors, Inc. | 9E03606EB7 | Apprenticeship Sponsor | Jun 30, 2011 |
| Enfield, CT | Morin Mechanical Services, LLC | 24E0EC0AA2 | Apprenticeship Sponsor | Jun 30, 2009 |
| New Haven, CT | MORNING GLORY INFANT-TODDLER CENTER | F453B6871A | Child Care Center + 1 more | Mar 31, 2030 |
| East Windsor, CT | Morris Electric | 53CE10DFD6 | Apprenticeship Sponsor | Jun 30, 2004 |
| Bantam, CT | Morris Marine Wiring, LLC | CC74F1B619 | Apprenticeship Sponsor | Jun 30, 2018 |
| Burlington, CT | Morrison's Home Improvement LLC | 340FB4B16A | Apprenticeship Sponsor + 2 more | Jun 30, 2027 |
| Woodbury, CT | MOSMAN WELL WORKS, LLC | 8BD77B2E77 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Canton, CT | Mountain Home Electric | 45E371F457 | Apprenticeship Sponsor | Jun 30, 2026 |
| Meriden, CT | Mountain side mechanical llc | AA63BE4FB0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Torrington, CT | Mquest, LLC DBA Quest Plastics | BF8F67845C | Apprenticeship Sponsor | Jun 30, 2023 |
| Harwington, CT | MR Heating & Cooling, LLC | 1D71B755A2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | Mr. B's Electric Company | 6EA164853D | Apprenticeship Sponsor | Jun 30, 2007 |
| Bolton, CT | Mr. Electric | 903D4CD1B7 | Apprenticeship Sponsor | Jun 30, 2011 |
| Stamford, CT | Mr. Electric | B44B9E9BB4 | Apprenticeship Sponsor | Jun 30, 2009 |
| Terryville, CT | Mr. Temps Mechanical Services | B1265E0AEA | Apprenticeship Sponsor | Jun 30, 2020 |
| Milford, CT | MRH Tool, LLC | 51CD820219 | Apprenticeship Sponsor | Jun 30, 2018 |
| Middlebury, CT | MRL Electric, Inc. | 3110B3D2A5 | Apprenticeship Sponsor | Jun 30, 2018 |
| Berlin, CT | MS Contracting & Electric LLC | F8A80C3184 | Apprenticeship Sponsor | Jun 30, 2026 |
| Rocky Hill, CT | MS Plumbing Solutions, LLC. | 5FE50A1443 | Apprenticeship Sponsor | Jun 30, 2027 |
| North Haven, CT | MSE Corporate Security | D66CFC147B | Apprenticeship Sponsor | Jun 30, 2010 |
| Portland, CT | MSM Ventures LLC dba Masselli & Sons Plumbing & Heating | 3474E74E06 | Apprenticeship Sponsor | Jun 30, 2008 |
| Centerbrook, CT | MTD Electrical Services, LLC | 882F2DB92E | Apprenticeship Sponsor | Jun 30, 2027 |
| West Haven, CT | MTL Heating and Cooling | D9F2DA162F | Apprenticeship Sponsor | Jun 30, 2026 |
| Andover, CT | MTM Corporation | 89580AADAE | Apprenticeship Sponsor | Jun 30, 2027 |
| Danbury, CT | Mucci Electric, LLC | 752F08F2FF | Apprenticeship Sponsor | Jun 30, 2021 |
| Haddam, CT | Muir Electric, Inc. | C0CC749EA4 | Apprenticeship Sponsor | Jun 30, 2027 |
| Meriden, CT | Mule Security & Electric Inc. | 40F8EAC798 | Apprenticeship Sponsor | Jun 30, 2023 |
| Wethersfield, CT | Mull Brothers Inc. | 68ADD41428 | Apprenticeship Sponsor | Jun 30, 2023 |
| Danbury, CT | MULVANEY MECHANICAL INC | 645D10F019 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Meriden, CT | MUNDO CONSTRUCTION LLC | 0E8096A43F | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Madison, CT | Munro Plumbing & Heating, LLC | 53B38728B1 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | MURACE PLUMBING CO., INC. | 8A4B1908E3 | Apprenticeship Sponsor | Jun 30, 2027 |
| Woodstock, CT | Murdock Electric & Security LLC | 8E0F03CD76 | Apprenticeship Sponsor | Jun 30, 2026 |
| East Haven, CT | Murgo Mechanical, LLC | B569F75A65 | Apprenticeship Sponsor | Jun 30, 2027 |
| Cos Cob, CT | Murphy Brothers Landscaping, LLC | BE83AD5D2B | Apprenticeship Sponsor | Jun 30, 2013 |
| North Haven, CT | Murphy Mechanical | B8E357C0B4 | Apprenticeship Sponsor | Jun 30, 2006 |
| Wolcott, CT | Musco Fuel, LLC | FC36D029D6 | Apprenticeship Sponsor | Jun 30, 2016 |
| Cromwell, CT | Muzak, LLC | DBE666C617 | Apprenticeship Sponsor | Jun 30, 2006 |
| Norwalk, CT | MV Lighting/Vinci Electric | 39921A3DC3 | Apprenticeship Sponsor | Jun 30, 2023 |
| Ellington, CT | MVC Home, LLC | 92F52CC008 | Apprenticeship Sponsor | Jun 30, 2024 |
| Groton, CT | MVP CUTS BARBERSHOP | F52EE63362 | Apprenticeship Sponsor | Jun 30, 2026 |
| Hartford, CT | MVP Performance Barbershop | 825E6D5696 | Apprenticeship Sponsor | Jun 30, 2020 |
| Trumbull, CT | MVP Plumbing and Heating, LLC | 1A42213D11 | Apprenticeship Sponsor | Jun 30, 2027 |
| Middletown, CT | My Plumber CT, LLC | E8C0A69A6A | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Andover, CT | My-Tech Mechanical Contractors, LLC | 4E38B5EC9B | Apprenticeship Sponsor | Jun 30, 2027 |
| Naugatuck, CT | Myers & Downey Plumbing & Heating, LLC | 8A16CE60A0 | Apprenticeship Sponsor | Jun 30, 2009 |
| Naugatuck, CT | Myers & Myers Plumbing & Heating, LLC | 462DAE0504 | Apprenticeship Sponsor | Jun 30, 2023 |
| Naugatuck, CT | Myers Plumbing & Heating LLC | 5F04510D4C | Apprenticeship Sponsor | Jun 30, 2005 |
| Glastonbury, CT | MYLO PLUMBING & HEATING INC | 6CC358E200 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Mystic, CT | Mystic Aquarium | C90B39BC57 | Apprenticeship Sponsor | Jun 30, 2026 |
| Stonington, CT | Mystic Electric, LLC | 15BACA1D69 | Apprenticeship Sponsor | Jun 30, 2027 |
| Mystic, CT | Mystic Mirror & Plate Glass | 10D35211A9 | Apprenticeship Sponsor | Jun 30, 2015 |
| Mystic, CT | Mystic Plumbing & Heating | 49C7231029 | Apprenticeship Sponsor | Jun 30, 2023 |
| Berlin, CT | N & J PLUMBING LLC | 91005E2C73 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stratford, CT | N AND S ELECTRIC INC N & S ELECTRIC INC | 96FDE0698F | Major Contractor + 1 more | Jun 30, 2027 |
| North Haven, CT | N Scasino Plumbing, LLC | 068AB65E1A | Apprenticeship Sponsor | Jun 30, 2025 |
| Stamford, CT | N.A.D. Electrical Services, Inc. | CEF3386DD4 | Apprenticeship Sponsor | Jun 30, 2023 |
| Lisbon, CT | N.P. Brulotte & Sons | B4EDC07037 | Apprenticeship Sponsor | Jun 30, 2025 |
| Canton, CT | Nadeau Electric, LLC | EFE28ED121 | Apprenticeship Sponsor | Jun 30, 2027 |
| Shelton, CT | Naiad Dynamics US, Inc. | ED4B8D82AB | Apprenticeship Sponsor | Jun 30, 2022 |
| Seymour, CT | Narowski Plumbing LLC | 031A369AB5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Franklin, CT | Nasin Electric L.L.C. | 1B8978BDA8 | Apprenticeship Sponsor | Jun 30, 2006 |
| Danbury, CT | Nassif Inc. | 935634A5C6 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stratford, CT | NATION ELECTRICAL CONTRACTING LLC | 6453ED1084 | Apprenticeship Sponsor | Jun 30, 2027 |
| Wolcott, CT | National Die Company | 065B0D4E7A | Apprenticeship Sponsor | Jun 30, 2011 |
| Stratford, CT | National Glass & Mirror Co. | B42F7282A9 | Apprenticeship Sponsor | Jun 30, 2015 |
| Warwick, RI | National Refrigeration Inc. | 549263854A | Apprenticeship Sponsor | Jun 30, 2014 |
| Clinton, CT | National Sintered Alloys, Inc. | 0F14D396B4 | Apprenticeship Sponsor | Jun 30, 2008 |
| Thomaston, CT | Nationwide Electric, LLC | EC2D260F11 | Apprenticeship Sponsor | Jun 30, 2013 |
| Harwinton, CT | Nationwide Mechanical Inc. | F54F01369E | Apprenticeship Sponsor | Jun 30, 2027 |
| Branford, CT | NATIONWIDE SECURITY CORPORATION | B33AE97E33 | Major Contractor + 1 more | Jun 30, 2027 |
| Voluntown, CT | Nature's Campsites, LLC | 6568F1B94C | Apprenticeship Sponsor | Jun 30, 2027 |
| Naugatuck, CT | NAUGATUCK GLASS, LLC | 69DCFFF85F | Apprenticeship Sponsor | — |
| Morris, CT | Naugatuck Valley Electric, LLC | B2AEBD8E2C | Apprenticeship Sponsor | Jun 30, 2021 |
| Naugatuck, CT | NAUGATUCK WINDOW AND GLASS LLC | A0E139214F | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Groton, CT | Naval Facilities Engineering Command | 934F8E0F0B | Apprenticeship Sponsor | Jun 30, 2020 |
| New Milford, CT | Nazzco Plumbing, LLC | 88E49C9966 | Apprenticeship Sponsor | Jun 30, 2024 |
| Milford, CT | Neals Precision Plumbing | 57038C5110 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bloomfield, CT | NEC Group, LLC | 354F063E4C | Apprenticeship Sponsor | Jun 30, 2027 |
| Wallingford, CT | NECA & IBEW LOCAL 90 JATC | ECDDBB76C6 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ashford, CT | Nelly's Glass and Metal Works | 1F1C926C13 | Apprenticeship Sponsor | Jun 30, 2026 |
| Shelton, CT | Nelson Electric LLC | C5EC077B06 | Apprenticeship Sponsor | Jun 30, 2023 |
| Norwalk, CT | Neno Clips, LLC | 0D099E65EE | Apprenticeship Sponsor | Jun 30, 2023 |
| North Haven, CT | Nero Air Conditioning Heating & Refrigeration | F9B02DF6F3 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Taftville, CT | NESC Inc. | 0AA1DA9DFB | Apprenticeship Sponsor | Jun 30, 2026 |
| Vernon, CT | Net Services LLC | 298A4B2B61 | Apprenticeship Sponsor | — |
| North Haven, CT | Network Electric & Security Systems, LLC | 9AA5AB4242 | Apprenticeship Sponsor | Jun 30, 2027 |
| Plainville, CT | Network Framing Solutions | CE6C886496 | Apprenticeship Sponsor | — |
| Wallingford, CT | Network Installation Services, Inc. | E8AB17A11A | Apprenticeship Sponsor | Jun 30, 2027 |
| Plainville, CT | NETWORK INTERIORS, INC. | F80E57D211 | Apprenticeship Sponsor | Jun 30, 2027 |
| Quaker Hill, CT | NEVCO ELECTRIC, LLC | EA76F5C541 | Apprenticeship Sponsor | Jun 30, 2024 |
| Brookfield, CT | Neves Electric, LLC | C71E5C798E | Apprenticeship Sponsor | Jun 30, 2023 |
| Danbury, CT | Neves Plumbing Service, LLC | F0D2A20AF5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Holyoke, MA | Neveu Mechanical Services, LLC | 88E6B21985 | Apprenticeship Sponsor | Jun 30, 2027 |
| Rocky Hill, CT | New Boston Management | EEC5D61142 | Apprenticeship Sponsor | Jun 30, 2004 |
| Burlington, CT | New Britain Electric | 84D7819672 | Apprenticeship Sponsor | Jun 30, 2007 |
| New Canaan, CT | New Canaan Alarm Co., Inc. | F1E154580B | Apprenticeship Sponsor | Jun 30, 2013 |
| New Canaan, CT | New Canaan Electric Co. LLC | F927D935A1 | Apprenticeship Sponsor | Jun 30, 2016 |
| Cheshire, CT | New Concepts Plumbing & Heating, Inc. | 8969809B9C | Apprenticeship Sponsor | Jun 30, 2014 |
| Danbury, CT | New England Air Systems, LLC | D565E4AC92 | Apprenticeship Sponsor | Jun 30, 2004 |
| Farmington, CT | New England Airfoil Products, Inc. | B936BD4E47 | Apprenticeship Sponsor | — |
| Bristol, CT | New England Barber Company | 25A735DFC5 | Apprenticeship Sponsor | Jun 30, 2024 |
| Rocky Hill, CT | New England Communications Corporation | 3A165155BF | Apprenticeship Sponsor | Jun 30, 2009 |
| Windsor, CT | New England Communications Systems Corp. | D47B3298AE | Apprenticeship Sponsor | Jun 30, 2013 |
| Woodbridge, CT | New England Conservation Services, Inc. | C6990BA707 | Apprenticeship Sponsor | Jun 30, 2011 |
| Waterbury, CT | New England Die Co., Inc. | 04FA8D0E47 | Apprenticeship Sponsor | Jun 30, 2022 |
| Danbury, CT | New England Electric | B3F0960327 | Apprenticeship Sponsor | Jun 30, 2027 |
| Newtown, CT | New England Electrical Contracting, Inc. | 48A63839C5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Windsor Locks, CT | New England Electrical Services, LLC | A0A2977557 | Apprenticeship Sponsor | Jun 30, 2019 |
| East Haddam, CT | NEW ENGLAND ENERGY CONTROLS, INC. | 5AFC5F7E33 | Apprenticeship Sponsor | Jun 30, 2027 |
| Norwich, CT | New England Glass & Mirror Co. | 86DEFEE675 | Apprenticeship Sponsor | Jun 30, 2027 |
| North Branford, CT | New England Heating and Air Conditioning, LLC | 638CA865FE | Apprenticeship Sponsor | Jun 30, 2016 |
| Rocky Hill, CT | NEW ENGLAND IRRIGATION, INC. | AAAD12B386 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Fairfield, CT | New England Lighting | B9E4097324 | Apprenticeship Sponsor | Jun 30, 2027 |
| South Windsor, CT | NEW ENGLAND MECHANICAL SERVICES INC. EMCOR SERVICES | 438BDA9EF9 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bloomfield, CT | New England Officiating Services & Dev. LLC dba NEOS | 67874344FF | Apprenticeship Sponsor | Jun 30, 2026 |
| Greenwich, CT | NEW ENGLAND OIL CO INC | D545DFFEA8 | Home Heating Fuel Dealer + 3 more | Sep 30, 2027 |
| Hartford, CT | New England Piping | E985DF8C09 | Apprenticeship Sponsor | Jun 30, 2010 |
| Plainville, CT | NEW ENGLAND PROPERTY PROS LLC | 9058F25F0C | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| East Tauton, MA | New England Safety Systems, INC. | CF3FB55765 | Apprenticeship Sponsor | Jun 30, 2014 |
| Moosup, CT | New England Service & Controls LLC | 6A2A5B1155 | Apprenticeship Sponsor | Jun 30, 2027 |
| Plainville, CT | New England Service Company | CCD5DE8EE7 | Apprenticeship Sponsor | Jun 30, 2007 |
| Derby, CT | New England Sheet Metal of Shelton, Inc. | 6895F90ED1 | Apprenticeship Sponsor | Jun 30, 2008 |
| Manchester, CT | New England Tool Corp. | 07C8BF6851 | Apprenticeship Sponsor | Jun 30, 2024 |
| Winsted, CT | New Hartford Electric, LLC | 631870CBB6 | Apprenticeship Sponsor | Jun 30, 2023 |
| New Haven, CT | NEW HAVEN BOYS & GIRLS CLUB | 3DE153363D | Youth Camp + 1 more | Jun 30, 2027 |
| New Haven, CT | New Haven Family Alliance | C92E65D00D | Apprenticeship Sponsor | Jun 30, 2005 |
| Northford, CT | New Haven Mechanical Contractors, Inc. | 11FF858136 | Apprenticeship Sponsor | Jun 30, 2007 |
| Hamden, CT | NEW HEIGHTS BARBERSHOP | 8601C4655C | Apprenticeship Sponsor | Jun 30, 2027 |
| Sterling, MA | New Horizons Technologies Inc. | D59197642D | Apprenticeship Sponsor | Jun 30, 2012 |
| Ledyard, CT | New London County Septic Service Inc. | A35A67F543 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| New London, CT | New London Public Schools Facilities Department | DE0ED8DBE8 | Apprenticeship Sponsor | Jun 30, 2027 |
| Waterbury, CT | New Millennium Barbershop | 127C85D2FD | Apprenticeship Sponsor | Jun 30, 2024 |
| Waterbury, CT | NEW OPPORTUNITIES INC | A6E0675039 | Public Charity + 1 more | Sep 30, 2026 |
| Stamford, CT | New Power Electric, LLC | 9AED51C1D1 | Apprenticeship Sponsor | Jun 30, 2025 |
| Sometown, CT | New Program | F7A8B9D057 | Apprenticeship Sponsor | — |
| Middletown, CT | New Style Hair Studio | 4381FD0058 | Apprenticeship Sponsor | Jun 30, 2027 |
| Orange, CT | New Tech Security, Inc. DBA The Flying Locksmiths | 69AB644826 | Apprenticeship Sponsor | Jun 30, 2019 |
| Bridgeport, CT | New World Electric, LLC | 61FB9FDF0C | Apprenticeship Sponsor | Jun 30, 2025 |
| Berlin, CT | NEWCO Electrical Contracting Services | 7DC53B350E | Apprenticeship Sponsor | Jun 30, 2026 |
| Southington, CT | Newcomb Spring Corp. | 9F06B94A92 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Britain, CT | NewEra Mechanical Services LLC | 883CD6D53C | Apprenticeship Sponsor | Jun 30, 2026 |
| Hartford, CT | Newfield Construction, Inc. | D643EAB793 | Apprenticeship Sponsor | Jun 30, 2010 |
| West Hartford, CT | NEWGATE OIL | 72B3374CF4 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Milford, CT | Newhart Products, Inc. | 7F4A0DD8A3 | Apprenticeship Sponsor | Jun 30, 2025 |
| Newington, CT | NEWINGTON ELECTRIC CO INC | 6AAEA517C3 | Major Contractor + 2 more | Jun 30, 2027 |
| Branford, CT | Newman Electric, LLC | 87EDAE5B2D | Apprenticeship Sponsor | Jun 30, 2013 |
| Middletown, CT | Newmark | E8BB5E8F0D | Apprenticeship Sponsor | Jun 30, 2026 |
| Waterbury, CT | Newmark Medical Components, Inc. | 35046E9E7F | Apprenticeship Sponsor | Jun 30, 2020 |
| Newtown, CT | Newtown Board of Education, Maint. Dept. | B72DE04682 | Apprenticeship Sponsor | Jun 30, 2015 |
| Seymour, CT | Nexgen Electric LLC | 574A2B41F5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Meriden, CT | Next Level Cutz | 938CF70A3C | Apprenticeship Sponsor | Jun 30, 2023 |
| Putnam, CT | Nextgen Security Co. LLC | C495D962C0 | Apprenticeship Sponsor | Jun 30, 2017 |
| Stratford, CT | Nextwave Electrical Contractors, LLC | 1957B71268 | Apprenticeship Sponsor | Jun 30, 2024 |
| Niantic, CT | Niantic Electrical Service | D9A1257D3D | Apprenticeship Sponsor | Jun 30, 2013 |
| Niantic, CT | Niantic Plumbing & Appliance Co., Inc. | 2DBCB88A7C | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Lebanon, CT | Nichols & Son Electric, LLC | A2E330AF4B | Apprenticeship Sponsor | Jun 30, 2027 |
| Madison, CT | Nichols Electric LLC | 0B8BD4D0D6 | Apprenticeship Sponsor | Jun 30, 2022 |
| Norwalk, CT | Nick Cappuccia Electrical & Sons LLC | 3CCD7768CC | Apprenticeship Sponsor | Jun 30, 2022 |
| Plainville, CT | Nickson Industries, Inc. | D4FDE3B763 | Apprenticeship Sponsor | Jun 30, 2020 |
| Greenwich, CT | Nielsen Electric LLC | BA7D997680 | Apprenticeship Sponsor | Jun 30, 2018 |
| Windsor, CT | Niles Electrical LLC | 74133A6F5D | Apprenticeship Sponsor | Jun 30, 2027 |
| Norwalk, CT | Nitzan Nursery School/Congregation BethEl | EDDE3470B0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Beacon Falls, CT | NJB Electrical Services, LLC | C0B2AAD18A | Apprenticeship Sponsor | Jun 30, 2012 |
| Shelton, CT | NJC ELECTRIC, LLC | 26D7D21ED0 | Apprenticeship Sponsor | Jun 30, 2027 |
| East Haven, CT | NJF Electrical Services, LLC | 83423A2457 | Apprenticeship Sponsor | Jun 30, 2026 |
| Harwinton, CT | No Limit Construction | AC124D2587 | Apprenticeship Sponsor | Jun 30, 2027 |
| Terryville, CT | NOAH'S ELECTRICAL SOLUTIONS LLC | E911AEAC86 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ledyard, CT | Noank Electric Electrical Contractors LLC | 18B0E6B947 | Apprenticeship Sponsor | Jun 30, 2027 |
| Glastonbury, CT | NOHO ZEPHYR NORTHEAST LLC DEGREE HEATING AND COOLING | E2A3280BB2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Wethersfield, CT | Nolco Plumbing | 6F0D46DF4E | Apprenticeship Sponsor | Jun 30, 2027 |
| Danbury, CT | NORBERT E MITCHELL CO INC | 6216B67909 | Retail Dairy Store + 6 more | Jun 30, 2028 |
| Simsbury, CT | Norden Mechanical Services, Inc. | D6E3A6EDF9 | Apprenticeship Sponsor | Jun 30, 2017 |
| Brookfield, CT | Nordex, Inc. | E0C77EB4A6 | Apprenticeship Sponsor | Jun 30, 2027 |
| Southington, CT | Nordic Air Heating & Cooling, LLC | E357CC195D | Apprenticeship Sponsor | Jun 30, 2012 |
| Meriden, CT | Norm Belval Air Conditioning & Heating, Inc. | 56879E188A | Apprenticeship Sponsor | Jun 30, 2015 |
| Northford, CT | NORTH AIR SYSTEMS, LLC | 5A3DB610EA | Apprenticeship Sponsor | Jun 30, 2027 |
| Shelton, CT | North American Protection Inc. | 7223846420 | Apprenticeship Sponsor | Jun 30, 2013 |
| Wallingford, CT | NORTH ATLANTIC STATES CARPENTERS TRAINING FUND | 8F4446B1E7 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Milford, CT | North East Imperial Electric LLC dba Imperial Electric | 7BBB659965 | Apprenticeship Sponsor | Jun 30, 2008 |
| Old Saybrook, CT | North East Irrigation | 38601A8926 | Apprenticeship Sponsor | Jun 30, 2027 |
| Plainville, CT | North Electrical, LLC | DAB27B6BAD | Apprenticeship Sponsor | Jun 30, 2027 |
| Goshen, CT | North Goshen Plumbing and Heating | EDF8FCBF00 | Apprenticeship Sponsor | Jun 30, 2013 |
| North Haven, CT | North Haven Electric, LLC | D4324AF40E | Apprenticeship Sponsor | Jun 30, 2025 |
| North Haven, CT | North Haven Mechanical Contractors, Inc. | 498898F9C8 | Apprenticeship Sponsor | Jun 30, 2026 |
| Bethany, CT | NORTH HAVEN SEWER CO., INC. | 89AD847848 | Apprenticeship Sponsor | Jun 30, 2026 |
| Trumbul, CT | North Star Homes, LLC | 48D146D46B | Apprenticeship Sponsor | Jun 30, 2025 |
| Sterling, CT | Northeast Comfort Solutions | 1424EB9AD5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Rocky Hill, CT | Northeast Dist. Roofers/Waterproofers LU#9 | 58D8B118F0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Rocky Hill, CT | Northeast Electrical Contractors LLC | A1800F0357 | Apprenticeship Sponsor | Jun 30, 2010 |
| Terryville, CT | Northeast Fire Prevention, Inc. | 792826D1E7 | Apprenticeship Sponsor | Jun 30, 2014 |
| Bridgeport, CT | Northeast Generator of Connecticut, Inc. | BE8F6500D0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bethany, CT | Northeast Heating & Cooling | 8B8532DC8B | Apprenticeship Sponsor | Jun 30, 2027 |
| Falls Village, CT | Northeast HVAC Design LLC | 91D5BA4448 | Apprenticeship Sponsor | Jun 30, 2027 |
| Moosup, CT | Northeast Mechanical | 14DE0D97D9 | Apprenticeship Sponsor | Jun 30, 2004 |
| Moosup, CT | Northeast Plumbing & Heating LLC | 451D929B6E | Apprenticeship Sponsor | Jun 30, 2015 |
| Manchester, CT | NORTHEAST PROTECTION PARTNERS, INC. | 8B73D4B8A8 | Apprenticeship Sponsor | Jun 30, 2027 |
| East Windsor, CT | Northeast Refrigeration & Insulation Contractor, Inc. | 207AD6642F | Apprenticeship Sponsor | Jun 30, 2008 |
| Farmington, CT | NORTHEAST TOWERS INC | B7A504E6F0 | Major Contractor + 1 more | Jun 30, 2027 |
| Brookfield, CT | NORTHEASTERN AIR SYSTEMS, LLC | 41FB79FB38 | Apprenticeship Sponsor | Jun 30, 2026 |
| Middlefield, CT | Northeastern Communications & Electrical, LLC | C19C5628CB | Apprenticeship Sponsor | Jun 30, 2027 |
| Enfield, CT | NorthEastern Sheet Metal Co., Inc. | 168CC30050 | Apprenticeship Sponsor | Jun 30, 2027 |
| Danbury, CT | Northern Comfort Mechanical, LLC | F833A4F23B | Apprenticeship Sponsor | Jun 30, 2027 |
| Cheshire, CT | Northern Comfort Services, LLC | 05C05AA97D | Apprenticeship Sponsor | Jun 30, 2022 |
| Sarasota, FL | Northern Cross Fire Protection, LLC | 104E686546 | Apprenticeship Sponsor | Jun 30, 2027 |
| Newtown, CT | Northern Lights Electric Inc. | 209D88ABEA | Apprenticeship Sponsor | Jun 30, 2027 |
| Bolton, CT | Northern Lights Electrical, LLC | AF53978DAC | Apprenticeship Sponsor | Jun 30, 2027 |
| East Norwalk, CT | Northern Plumbing & Heating | 12A06BF4E7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | Northfield Energy, LLC | 49749DE32E | Apprenticeship Sponsor | Jun 30, 2019 |
| Southington, CT | Northstar Service LLC | E394A9FE37 | Apprenticeship Sponsor | Jun 30, 2027 |
| Litchfield, CT | Northwest Alarm & Security Systems, LLC | 84F373DC39 | Apprenticeship Sponsor | Jun 30, 2012 |
| Canaan, CT | Northwest CT Contracting, LLC | A6D72AC2EF | Apprenticeship Sponsor | Jun 30, 2024 |
| Falls Village, CT | Northwest Radiant Heating Systems | BD2B00C1D9 | Apprenticeship Sponsor | Jun 30, 2010 |
| Norwalk, CT | Norwalk Electricians JATC Local Union 208 | 8627A6CF98 | Apprenticeship Sponsor | Jun 30, 2010 |
| Norwalk, CT | Norwalk Fire Department | 9046FFCD15 | Apprenticeship Sponsor | Jun 30, 2023 |
| Norwalk, CT | Norwalk Hospital | C26F67A6EF | Apprenticeship Sponsor | Jun 30, 2006 |
| Norwich, CT | Norwich Bulletin | 5C768D696B | Apprenticeship Sponsor | Jun 30, 2009 |
| Norwich, CT | NORWICH PUBLIC UTILITIES | D0996BCA3A | Retail Gasoline Dealer + 3 more | Oct 31, 2027 |
| Chicopee, MA | Notch Mechanical Constructors att: Kristin | 85722B43ED | Apprenticeship Sponsor | Jun 30, 2027 |
| North Brandford, CT | Notchick And Sons Electric, LLC | C0154F8CB8 | Apprenticeship Sponsor | Jun 30, 2027 |
| Waterbury, CT | NOUJAIM TOOL CO., INC. | B93927C54B | Apprenticeship Sponsor | Jun 30, 2027 |
| North Haven, CT | Nova Piping Company | 80D6FE30DE | Apprenticeship Sponsor | Jun 30, 2013 |
| Burlington, CT | Novare Electronics, LLC | A02F2FEFBA | Apprenticeship Sponsor | Jun 30, 2020 |
| Griswold, CT | Novick Mechanical LLC | 04DD44F428 | Apprenticeship Sponsor | Jun 30, 2026 |
| Bristol, CT | Novo Precision, LLC | 22E7B655C1 | Apprenticeship Sponsor | Jun 30, 2027 |
| Southington, CT | Now Mechanical, LLC | 88DAB2A7CC | Apprenticeship Sponsor | Jun 30, 2016 |
| North Haven, CT | Now Security Systems, Inc. | E439E88609 | Apprenticeship Sponsor | Jun 30, 2017 |
Alphabetical order — this site ranks no one. Businesses with at least one active credential in the Connecticut eLicensing file of October 1, 2026. How to read this.