Apprenticeship Sponsor — page 15 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 |
|---|---|---|---|---|
| Branford, CT | Plumbing Plus | 49D061A405 | Apprenticeship Sponsor | Jun 30, 2017 |
| New Haven, CT | Plumbing Solutions, LLC | 66BDDF8DA1 | Apprenticeship Sponsor | Jun 30, 2019 |
| Norwalk, CT | PLUMBING WORKS LLC | 24E054AA69 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Stafford Springs, CT | Plumbpro, LLC | 6379867453 | Apprenticeship Sponsor | Jun 30, 2009 |
| Berlin, CT | Plumbums, LLC | 38A5F572C6 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Danbury, CT | Plumtrees Plumbing & Heating, LLC | 53221D6DBE | Apprenticeship Sponsor | Jun 30, 2010 |
| Thomaston, CT | Plymouth Glass & Mirror, Inc. | E00459843F | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Plymouth, CT | PLYMOUTH OIL SERVICE | EE21902FDD | Motor Fuel Quality Registration + 3 more | Oct 31, 2027 |
| Bristol, CT | Plymouth Spring Co., Inc. | 8B3E4AB800 | Apprenticeship Sponsor | Jun 30, 2027 |
| Danbury, CT | PMC-STC, Inc. | 8A33F6D384 | Apprenticeship Sponsor | Jun 30, 2027 |
| Lisbon, CT | PMT | 3CBB87EB5C | Apprenticeship Sponsor | Jun 30, 2015 |
| Granby, CT | Poitras Electric Company, The | 2EF5CBF626 | Apprenticeship Sponsor | Jun 30, 2017 |
| New Britain, CT | Polamer Precision, Inc. | 88D910C276 | Apprenticeship Sponsor | Jun 30, 2019 |
| Shelton, Ct, CT | Polica Inc, DBA Mister Sparky Electric | 858D4DF352 | Apprenticeship Sponsor | Jun 30, 2026 |
| Madison, CT | Polo Plumbing & Heating, LLC | 3B81A241FA | Apprenticeship Sponsor | Jun 30, 2027 |
| Orange, CT | Poltech Solutions, LLC | 7FF7C597A5 | Apprenticeship Sponsor | Jun 30, 2012 |
| New Milford, CT | Polytec Electrical Contractors, LLC | F456515C9F | Apprenticeship Sponsor | Jun 30, 2027 |
| Bridgeport, CT | Pond Electric, LLC | 81209BD4C2 | Apprenticeship Sponsor | Jun 30, 2014 |
| Litchfield, CT | Porch Light Electric, LLC | 5C0CDB13C6 | Apprenticeship Sponsor | Jun 30, 2014 |
| Rocky Hill, CT | Porter & Chester Institute | 40382957A7 | Apprenticeship Sponsor | Jun 30, 2011 |
| Portalnd, CT | Portland Board of Education | 2116F2D907 | Apprenticeship Sponsor | — |
| Shelton, CT | Posigen CT, LLC | 8A02E8D090 | Apprenticeship Sponsor | Jun 30, 2026 |
| Bristol, CT | Positano Plumbing, Inc. | 0374BB6ED7 | Apprenticeship Sponsor | Jun 30, 2018 |
| Glastonbury, CT | Positive Energy Electrical Contractors, LLC | 2AFF42F6A7 | Apprenticeship Sponsor | Jun 30, 2015 |
| Easton, CT | Positive Plumbing and Heating LLC | D327C0833B | Apprenticeship Sponsor | Jun 30, 2026 |
| Weston, CT | Positively Electric Plus , LLC | 7EAE7034EE | Apprenticeship Sponsor | Jun 30, 2027 |
| Southington, CT | Possidento Electrical Contractors, LLC | 62A45A34F1 | Apprenticeship Sponsor | Jun 30, 2009 |
| Plainville, CT | Possidento Therrien Electrical Contrs., LLC | 0F0B17B6EF | Apprenticeship Sponsor | Jun 30, 2027 |
| Milford, CT | Potkay Electric, LLC | 26A1D140F3 | Apprenticeship Sponsor | Jun 30, 2024 |
| North Windham, CT | POTTER'S OIL SERVICE INC | FBB458797A | Home Heating Fuel Dealer + 1 more | Sep 30, 2027 |
| Clinton, CT | Powell Plumbing LLC | B1517A81E9 | Apprenticeship Sponsor | Jun 30, 2015 |
| Waterbury, CT | Power Cell Electric, LLC | 2BE9505C11 | Apprenticeship Sponsor | Jun 30, 2025 |
| Fairfield, CT | Power Design Electric, LLC | 8DAC3878F7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Hamden, CT | Power Electric, Inc. | 2781D36CE8 | Apprenticeship Sponsor | Jun 30, 2012 |
| Milford, CT | Power Forward, LLC | F77C0D0127 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | Power Fuels, LLC | EFF00CA405 | Apprenticeship Sponsor | Jun 30, 2013 |
| Burlington, CT | Power Industries, LLC | A1ED73155E | Apprenticeship Sponsor | Jun 30, 2026 |
| East Hartland, CT | POWER LINE ELECTRIC, LLC | 44B4838637 | Apprenticeship Sponsor | Jun 30, 2025 |
| West Haven, CT | Power Plus Electric & Communications, LLC | BA830A2341 | Apprenticeship Sponsor | Jun 30, 2027 |
| South Glastonbury, CT | Power Point Energy | 68D4F01E5B | Apprenticeship Sponsor | Jun 30, 2023 |
| Southington, CT | Power Pro LLC | AE3A35C7BE | Apprenticeship Sponsor | Jun 30, 2014 |
| Wallingford, CT | Power Pros Electrical Services, LLC | 475C432B89 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | Power Shield, LLC | DFE69B55F2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | Power Solutions, LLC | 50ECCF7A51 | Apprenticeship Sponsor | Jun 30, 2026 |
| Columbia, CT | Power Supply LLC | 3F332B62E3 | Apprenticeship Sponsor | Jun 30, 2009 |
| Farmington, CT | Power Systems Electrical Contractors, LLC | 8739D51466 | Apprenticeship Sponsor | Jun 30, 2027 |
| Avon, CT | Power Unlimited Inc. | CF587A000C | Apprenticeship Sponsor | Jun 30, 2027 |
| Roxbury, CT | Power Up Electric dba Service Stars | 0A76893DFE | Apprenticeship Sponsor | Jun 30, 2013 |
| Enfield, CT | POWER-ON ELECTRIC, LLC | F150502C00 | Apprenticeship Sponsor | Jun 30, 2025 |
| Middlefield, CT | Powerhold, Inc. | 9DCA069986 | Apprenticeship Sponsor | Jun 30, 2016 |
| Norwalk, CT | Powerhouse Electric CT | B27D83DF68 | Apprenticeship Sponsor | Jun 30, 2027 |
| Seymour, CT | Powerhouse Electrical Services, Inc. | 32B3E3F501 | Apprenticeship Sponsor | Jun 30, 2015 |
| West Haven, CT | Powersmart Electric, LLC | FA1ECEBE0A | Apprenticeship Sponsor | Jun 30, 2027 |
| Prospect, CT | Powertech Electric LLC | 21953EBFDD | Apprenticeship Sponsor | Jun 30, 2027 |
| Manchester, CT | PPM Electric, LLC | E2696AB55A | Apprenticeship Sponsor | Jun 30, 2010 |
| Brookfield, CT | PR Electrical Corp. | 6DCEDC0A4E | Apprenticeship Sponsor | Jun 30, 2026 |
| Wallingford, CT | Practical Energy Solutions, Inc. | BE616FE348 | Apprenticeship Sponsor | Jun 30, 2020 |
| South Norwalk, CT | Pramer Fuel Inc. | B3C771DD57 | Apprenticeship Sponsor | Jun 30, 2014 |
| Middletown, CT | Pratt & Whitney Aircraft Group | 1E027C57C9 | Apprenticeship Sponsor | Jun 30, 2026 |
| New Britain, CT | Precise Barber Shop, LLC | 8DAB29738C | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | PRECISE HVAC HOME SERVICES LLC | 3451FAFD19 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Bristol, CT | Precision Air, Inc. | 1D8407BA97 | Apprenticeship Sponsor | Jun 30, 2024 |
| Norwalk, CT | Precision Electric | 7B3F58E645 | Apprenticeship Sponsor | Jun 30, 2008 |
| Monroe, CT | Precision Electric LLC | BAE0373408 | Apprenticeship Sponsor | Jun 30, 2014 |
| East Hartland, CT | Precision Electrical Contracting LLC | 66FC5DFB09 | Apprenticeship Sponsor | Jun 30, 2024 |
| North Haven, CT | Precision Electrical Services LLC | 0D0005E055 | Apprenticeship Sponsor | Jun 30, 2007 |
| North Haven, CT | Precision Electrical Svcs. & Audio/Video, LLC | CB1775BD86 | Apprenticeship Sponsor | Jun 30, 2008 |
| Wallingford, CT | Precision Food Service, Inc. | C753E361F4 | Apprenticeship Sponsor | Jun 30, 2023 |
| East Hampton, CT | Precision Heat & Electric Co. | 410D3FB3B0 | Apprenticeship Sponsor | Jun 30, 2009 |
| New Britain, CT | Precision Mechanical LLC | F22C7E581E | Apprenticeship Sponsor | Jun 30, 2024 |
| Guilford, CT | Precision Mechanical Services, Inc. | 29EC9FDA13 | Apprenticeship Sponsor | Jun 30, 2008 |
| Portland, CT | Precision Plastic Products, Inc. | 740A95FA15 | Apprenticeship Sponsor | Jun 30, 2027 |
| Willimantic, CT | Precision Plumbing & Mechanical LLC | AF70DDDE13 | Apprenticeship Sponsor | Jun 30, 2024 |
| Southbury, CT | Precision Plumbing CT, LLC | ED1388E8BF | Apprenticeship Sponsor | Jun 30, 2027 |
| Berlin, CT | Precision Punch & Tooling | C4CF22D854 | Apprenticeship Sponsor | Jun 30, 2019 |
| Shelton, CT | Precision Resource Incorporated | FD96AB10A1 | Apprenticeship Sponsor | Jun 30, 2027 |
| Milford, CT | Precision Sensors | BD5C4DEFA7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Brookfield, CT | Preferred Air Systems, Inc. | 7F2812C48D | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Watertown, CT | Preferred CNC LLC | 845800E946 | Apprenticeship Sponsor | Jun 30, 2026 |
| Berlin, CT | Preferred Electric, LLC | 33A6835894 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ridgefield, CT | Preferred Electrical Contractors, Inc. | 06E97B919F | Apprenticeship Sponsor | Jun 30, 2025 |
| East Haven, CT | Preferred Plumbing & Drain Services LLC | 5D12C11D11 | Apprenticeship Sponsor | Jun 30, 2027 |
| Cheshire, CT | PREFERRED PROPERTIES LANDSCAPING INC | C1F0C0829B | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Manchester, CT | Preferred Services Inc. | 53AF55CAD1 | Apprenticeship Sponsor | Jun 30, 2016 |
| Shelton, CT | Preferred Tool & Die, Inc. | 8BA71567AF | Apprenticeship Sponsor | Jun 30, 2025 |
| Danbury, CT | Preferred Utilities Manufacturing Company | 306CDCAD5F | Apprenticeship Sponsor | Jun 30, 2027 |
| Wallingford, CT | PremAir Heating & Cooling, LLC | FB1252401F | Apprenticeship Sponsor | Jun 30, 2011 |
| Bridgeport, CT | Premier Electric Co., Inc. | 2F6F04DC87 | Apprenticeship Sponsor | Jun 30, 2022 |
| Norwalk, CT | Premier Electric of Norwalk LLC | FA70E32FD6 | Apprenticeship Sponsor | Jun 30, 2018 |
| Hartford, CT | Premier Electrical Contractor LLC | D58CC5C9D2 | Apprenticeship Sponsor | Jun 30, 2022 |
| Wallingford, CT | Premier Group, LLC | 48A7714B42 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Mystic, CT | Premier Mechanical, LLC. | F81A7DE9EB | Apprenticeship Sponsor | Jun 30, 2017 |
| Groton, CT | Premier Services Group, Inc. | 1DD3724037 | Apprenticeship Sponsor | Jun 30, 2011 |
| New Haven, CT | Premiere Plumbing & Heating Co. Inc. | D635DF468C | Apprenticeship Sponsor | Jun 30, 2013 |
| Danbury, CT | Premium Electric Corp. | A991A98E4B | Apprenticeship Sponsor | Jun 30, 2020 |
| Morris, CT | Premium Northeast Plumbing LLC | FC0A3DD619 | Apprenticeship Sponsor | Jun 30, 2026 |
| North Haven, CT | Prentiss Electric LLC | 8A2A192AAD | Apprenticeship Sponsor | Jun 30, 2016 |
| Watertown, CT | Presspart, T & M Inc. | 680921B0E6 | Apprenticeship Sponsor | Jun 30, 2006 |
| Newtown, CT | Prestige Electric LLC | 4B738052B4 | Apprenticeship Sponsor | Jun 30, 2016 |
| East Hartford, CT | Prestige Plumbing, LLC | E817799EE7 | Apprenticeship Sponsor | Jun 30, 2025 |
| Milford, CT | Prestige Tool Mfg., LLC | BC32B343EB | Apprenticeship Sponsor | Jun 30, 2018 |
| Windsor Locks, CT | Prevolt, LLC | FF04C02688 | Apprenticeship Sponsor | Jun 30, 2026 |
| West Hartford, CT | Pride Improvement LLC | 2CD7C05A55 | Apprenticeship Sponsor | Jun 30, 2011 |
| North Haven, CT | Primary Electric Inc. | B058CA24E8 | Apprenticeship Sponsor | Jun 30, 2020 |
| Manchester, CT | Primary Technology Solutions | BAA160191F | Apprenticeship Sponsor | Jun 30, 2007 |
| Norwich, CT | PRIME ELECTRIC LLC | 2DE070B6EB | Major Contractor + 3 more | Jun 30, 2027 |
| West Haven, CT | Prime Plumbing, Heating & Cooling, LLC | E9CA9F6375 | Apprenticeship Sponsor | Jun 30, 2025 |
| New Milford, CT | Prime Solutions, Inc. | 30DCCF781F | Apprenticeship Sponsor | Jun 30, 2015 |
| Norwalk, CT | Primos barbershop | 80DFA920E6 | Apprenticeship Sponsor | Jun 30, 2027 |
| Milford, CT | Princess Hair Designers | 07D30CEBF9 | Apprenticeship Sponsor | — |
| Berlin, CT | Priority Electric, Inc. | 6C73FCB6CD | Apprenticeship Sponsor | Jun 30, 2027 |
| Ansonia, CT | Priority Electrical Infrastructures | F02F57C037 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bloomfield, CT | Priority Fuel, Inc | BC62A71710 | Apprenticeship Sponsor | Jun 30, 2012 |
| Ansonia, CT | Priority Plumbing & Heating, LLC | EFF6589250 | Apprenticeship Sponsor | Jun 30, 2026 |
| Cheshire, CT | PRIORITY SOLAR LLC | 697EA32AF0 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Wolcott, CT | Pro Energy Lighting LLC DBA - Total Energy Electric, INC. | B7B78F717F | Apprenticeship Sponsor | Jun 30, 2012 |
| Gales Ferry, CT | Pro Plumbing | 9467BE0297 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Milford, CT | Pro Plumbing & Heating Inc. | 09109E4CBC | Apprenticeship Sponsor | Jun 30, 2011 |
| North Haven, CT | Pro Plumbing and Drain Services | 508A405326 | Apprenticeship Sponsor | Jun 30, 2025 |
| East Hartford, CT | PRO SYSTEMS EXPERTS LLC NEXT GENERATION ALARMS | 832DD62765 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Southington, CT | Pro Tec Electrical Services LLC | B411703872 | Apprenticeship Sponsor | Jun 30, 2022 |
| East Hartford, CT | PRO-7 FIRE PROTECTION, LLC | 49012F8A1A | Apprenticeship Sponsor | Jun 30, 2027 |
| Bethlehem, CT | PRO-ELECTRIC INC. | 33A8256204 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bloomfield, CT | PRO-MECH INC | AB34A07D7B | Major Contractor + 1 more | Jun 30, 2027 |
| Easton, CT | Procaccini Plumbing & Heating, LLC | D018178D5E | Apprenticeship Sponsor | Jun 30, 2021 |
| Taftville, CT | Procko Electric | 99628BF0C8 | Apprenticeship Sponsor | Jun 30, 2009 |
| Kensington, CT | ProCom Telecommunications Corporation | C6259C48C1 | Apprenticeship Sponsor | Jun 30, 2011 |
| Meriden, CT | Production Equipment Co. | 91F2541FBF | Apprenticeship Sponsor | Jun 30, 2020 |
| East Hampton, CT | Professional Electric Corp. | 6B78414188 | Apprenticeship Sponsor | Jun 30, 2025 |
| Deep River, CT | Professional Electric Service Co. | 95F1EFE58D | Apprenticeship Sponsor | Jun 30, 2005 |
| Canton, MA | PROFESSIONAL ELECTRICAL CONTRACTORS OF CT | 46ED075054 | Apprenticeship Sponsor | Jun 30, 2027 |
| Orange, CT | Professional Electrical Services, LLC | DF05EDEB8D | Apprenticeship Sponsor | Jun 30, 2026 |
| Assonet, MA | Professional Fire & Security, Inc. | 54D3318E4A | Apprenticeship Sponsor | Jun 30, 2015 |
| Colchester, CT | Professional Protection LLC | 4C6B6BC309 | Apprenticeship Sponsor | Jun 30, 2017 |
| Southbury, CT | Professional Pump Service LLC | 5EB314DB26 | Apprenticeship Sponsor | Jun 30, 2009 |
| Stamford, CT | Professional Security Group | 0C4C8AF990 | Apprenticeship Sponsor | Jun 30, 2025 |
| Kensington, CT | Professional Security Systems, LLC | C869418DE3 | Apprenticeship Sponsor | Jun 30, 2021 |
| Ridgefield, CT | Professional Water Systems, Inc. | 3122A704EE | Apprenticeship Sponsor | Jun 30, 2027 |
| Rocky Hill, CT | Professional Wiring Resources, LLC | 7B50343198 | Apprenticeship Sponsor | Jun 30, 2018 |
| Darien, CT | Proficient Electric LLC | 6C979B7671 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Harwinton, CT | ProFlow Plumbing & Heating LLC | 2F7EAC7199 | Apprenticeship Sponsor | Jun 30, 2026 |
| Bridgewater, CT | Programmed Systems LLC | 8CAF90990A | Apprenticeship Sponsor | Jun 30, 2009 |
| Derby, CT | Progressive Mechanical, LLC | 802C5EBF46 | Apprenticeship Sponsor | Jun 30, 2010 |
| South Windsor, CT | Progressive Sheet Metal, LLC | E30C00F2F2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Glastonbury, CT | Projects, Inc. | 6C5B9D169E | Apprenticeship Sponsor | Jun 30, 2027 |
| Brookfield, CT | PRONTO ENVIRONMENTAL CO INC | C5A8AEF45E | Major Contractor + 2 more | Jun 30, 2027 |
| Bethel, CT | Pronto Plumbing & Heating Inc. | 6DD9C7286C | Apprenticeship Sponsor + 1 more | Jun 30, 2028 |
| Wallingford, CT | Proper Ventilation, LLC | B35C1258C9 | Apprenticeship Sponsor | Jun 30, 2022 |
| Trumbull, CT | Property Protection Consulting, LLC | D3793A4965 | Apprenticeship Sponsor | Jun 30, 2026 |
| Andover, CT | Propower, LLC dba Mister Sparky | EB926B92E6 | Apprenticeship Sponsor | Jun 30, 2009 |
| Southington, CT | PROSERVICE HVAC & PLUMBING | 874C882BA6 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Prospect, CT | Prospect Machine Products | B37C93FEB6 | Apprenticeship Sponsor | Jun 30, 2023 |
| Andover, CT | Protech Services, LLC | 47BC567295 | Apprenticeship Sponsor | Jun 30, 2008 |
| Waterbury, CT | Protect America Corporation dba Dynamark Security Secure Net | D7627751A5 | Apprenticeship Sponsor | Jun 30, 2027 |
| North Haven, CT | Protection One Alarm Monitoring, Inc. | 8CAA6CBBB6 | Apprenticeship Sponsor | Jun 30, 2021 |
| East Hartford, CT | Protek Security Systems Inc. | C78623EAD0 | Apprenticeship Sponsor | Jun 30, 2012 |
| North Haven, CT | Protek Security, LLC | D611F9743C | Apprenticeship Sponsor | Jun 30, 2024 |
| Coventry, CT | Pruneau Electric | F72E4C74C1 | Apprenticeship Sponsor | Jun 30, 2016 |
| Trumbull, CT | Prusasky Electric Inc. | 1DCABF60F0 | Apprenticeship Sponsor | Jun 30, 2011 |
| Willimantic, CT | Prysmian Group | CE2ADA41FC | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | PSC Mechanical, LLC | 818B6A688A | Apprenticeship Sponsor | Jun 30, 2027 |
| Oxford, CT | PTA CORPORATION | A79995E94B | Apprenticeship Sponsor | Jun 30, 2015 |
| Hartford, CT | Puerto Pelo by Mary LLC | B7D48E76AF | Apprenticeship Sponsor | Jun 30, 2023 |
| Middletown, CT | Puorro Electric LLC | 8BF2E11B0E | Apprenticeship Sponsor | Jun 30, 2010 |
| Waterford, CT | Pure Energy, LLC | BD0E1D83BC | Apprenticeship Sponsor | Jun 30, 2025 |
| Oxford, CT | Pure Platinum Hair Studio | F12AFFC7F6 | Apprenticeship Sponsor | — |
| Prospect, CT | Pure Power Electric, LLC | 63FD4F7C50 | Apprenticeship Sponsor | Jun 30, 2027 |
| Moodus, CT | Pure Water Plumbing | 32758A8DA7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Greenwich, CT | Putnam Electrical Maintenance Co. Inc. | 39D9E01C88 | Apprenticeship Sponsor | Jun 30, 2004 |
| Dayville, CT | Putnam Plastics Corporation | 102CF1D99F | Apprenticeship Sponsor | Jun 30, 2027 |
| Old Saybrook, CT | Pye & Hogan Machine Company | 43C8EA886E | Apprenticeship Sponsor | Jun 30, 2004 |
| Middletown, CT | PYE-BARKER FIRE & SAFETY | EF9AC2FAC5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Brookfield, CT | PYE-BARKER FIRE & SAFETY, LLC BROOKFIELD | 8852E924B5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Uncasville, CT | Q's Plumbing and Heating, LLC | 269ED62325 | Apprenticeship Sponsor | Jun 30, 2024 |
| North Haven, CT | QC Electric, LLC | D989D814D5 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| East Haven, CT | QDS Electric LLC | EFC3A8D75E | Apprenticeship Sponsor | Jun 30, 2011 |
| Windsor Locks, CT | QE Solar Electrical Services, LLC | EF92845BA7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Quaker Hill, CT | Quaker Hill Plumbing & Heating, LLC | DBF449BD62 | Apprenticeship Sponsor | Jun 30, 2011 |
| Hamden, CT | Quality Builders, LLC | 16BC3E7A24 | Apprenticeship Sponsor | Jun 30, 2026 |
| North Branford, CT | Quality Electric Inc. | 40CC56B4E5 | Apprenticeship Sponsor | Jun 30, 2026 |
| Niantic, CT | Quality Electric Service Inc. | F78134C794 | Apprenticeship Sponsor | Jun 30, 2008 |
| Manchester, CT | Quality Electrical Work LLC | 69C6EC2671 | Apprenticeship Sponsor | Jun 30, 2007 |
| Wallingford, CT | Quality Engineering Services, Inc. | C7C4D8FF8A | Apprenticeship Sponsor | Jun 30, 2027 |
| Watertown, CT | Quality Glass Works, Inc. | 29D737034E | Apprenticeship Sponsor | Jun 30, 2020 |
| East Windsor, CT | QUALITY HEATING & COOLING LLC DBA AIR SERVE OF NORTH AMERICA | 17B81D6CBF | Apprenticeship Sponsor | Jun 30, 2026 |
| Berlin, CT | Quality Home Systems & A/C, LLC | 6BD406E4B4 | Apprenticeship Sponsor | Jun 30, 2023 |
| East Haven, CT | Quality Mechanical Corporation | E454541421 | Apprenticeship Sponsor | Jun 30, 2027 |
| Torrington, CT | Quality Mechanical Service LLC | 13657A43AD | Apprenticeship Sponsor | Jun 30, 2022 |
| Windsor Locks, CT | QUALITY PLUMBING & DRAIN SERVICES LLC | 1171299D1E | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Dayville, CT | Quality Plumbing & Heating, LLC | 90BB1D944C | Apprenticeship Sponsor | Jun 30, 2025 |
| Clinton, CT | QUALITY PROPANE INC | 2ACAD175FB | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Bristol, CT | Quality Wire EDM | D055D17DB4 | Apprenticeship Sponsor | Jun 30, 2021 |
| Sterling, CT | Quiet Corner Plumbing LLC | 063C395D2D | Apprenticeship Sponsor | Jun 30, 2009 |
| North Windham, CT | Quiet Corners Mechanical Services, LLC | C4B5D89627 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ansonia, CT | Quigley Electric | 07B957AA57 | Apprenticeship Sponsor | Jun 30, 2018 |
| Ridgefield, CT | Quinn Electrical Contracting, LLC | 91A00C4568 | Apprenticeship Sponsor | Jun 30, 2006 |
| North Haven, CT | Quinn Plumbing & Heating, LLC | 844F5BC41D | Apprenticeship Sponsor | Jun 30, 2027 |
| Westport, CT | Quinoco, Inc. | EBAAE2348D | Apprenticeship Sponsor | Jun 30, 2027 |
| Guilford, CT | R & B Refrigeration, Inc. | 1706167829 | Apprenticeship Sponsor | Jun 30, 2027 |
| Guilford, CT | R & B Sheetmetal Inc. | DDEBF807AF | Apprenticeship Sponsor | Jun 30, 2005 |
| Bristol, CT | R & C ELECTRIC LLC | 1836D7F348 | Major Contractor + 2 more | Jun 30, 2027 |
| Old Lyme, CT | R & D Electric, LLC | B38E04CE26 | Apprenticeship Sponsor | Jun 30, 2019 |
| Storrs, CT | R & E Electric, LLC | BD30DA04B8 | Apprenticeship Sponsor | Jun 30, 2012 |
| Plymouth, CT | R & E HEATING AND AIR CONDITIONING, LLC | B20BF30015 | Apprenticeship Sponsor | Jun 30, 2018 |
| Thomaston, CT | R & G Precision Tool, Inc. DBA Alta Precision Industries Inc. | C711C6168F | Apprenticeship Sponsor | Jun 30, 2007 |
| Brookfield, CT | R & J Electrical Contractors, LLC | C0AE0D0589 | Apprenticeship Sponsor | Jun 30, 2024 |
| Ansonia, CT | R & J Scarpa Plumbing Service LLC | 374C0C5425 | Apprenticeship Sponsor | Jun 30, 2009 |
| Danbury, CT | R & L HOME SERVICES LLC | FC96BC6570 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Bethlehem, CT | R & L Plumbing & Heating LLC | 41FFCB43C5 | Apprenticeship Sponsor | Jun 30, 2018 |
| Plantsville, CT | R & M Painting LLC | 427B4246C2 | Apprenticeship Sponsor | Jun 30, 2010 |
| Stratford, CT | R & M SITEWORK, LLC | 743A351971 | Apprenticeship Sponsor | Jun 30, 2027 |
| Waterford, CT | R & R Electric Service, LLC | 626FF1E0DA | Apprenticeship Sponsor | Jun 30, 2005 |
| Bridgeport, CT | R & R Heating and Cooling | 03E3ADDBF3 | Apprenticeship Sponsor | Jun 30, 2024 |
| Milford, CT | R & R MECHANICAL SERVICES | 38F6C4402D | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Manchester, CT | R & R Plumbing & Heating, Inc. | 37D396331F | Apprenticeship Sponsor | Jun 30, 2013 |
| Meriden, CT | R & R Plumbing, LLC | 9017522433 | Apprenticeship Sponsor | Jun 30, 2022 |
| Winsted, CT | R & S Oil Burner Service, Inc. | 13DB841944 | Apprenticeship Sponsor | Jun 30, 2010 |
| Salem, CT | R & W HEATING ENERGY SOLUTIONS LLC | 9255AA812F | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Fairfield, CT | R C BIGELOW INC | 0BD28401F7 | Food Manufacturing Establishment + 2 more | Jun 30, 2027 |
| Litchfield, CT | R J Electric | 709014E784 | Apprenticeship Sponsor | Jun 30, 2008 |
| Weatogue, CT | R J Romitelli Plumbing & Heating | 1099C5D4C9 | Apprenticeship Sponsor | Jun 30, 2015 |
| New Haven, CT | R. A. Ronshagen Mechanical Services | FE24127E5C | Apprenticeship Sponsor | Jun 30, 2007 |
| Norwalk, CT | R. E. Lee, Inc. | 315E4452B2 | Apprenticeship Sponsor | Jun 30, 2006 |
| North Canaan, CT | R. Foley Electric, LLC | 7873705D77 | Apprenticeship Sponsor | Jun 30, 2027 |
| Newington, CT | R. Follo & Sons Plumbing, LLC | 1507908F6A | Apprenticeship Sponsor | Jun 30, 2023 |
| Bristol, CT | R. Laviero Plumbing,Heating & A/C, LLC | 71D8D2AD89 | Apprenticeship Sponsor | Jun 30, 2010 |
| Tolland, CT | R. M. Hansen Electrical Contractor, Inc. | 4B7089F7BB | Apprenticeship Sponsor | Jun 30, 2011 |
| Greenwich, CT | R. Parent & Electric | C539754B89 | Apprenticeship Sponsor | Jun 30, 2011 |
| East Berlin, CT | R. PELTON BUILDERS, INC. | 0ADF5380F4 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Somers, CT | R. Pettee Electric LLC | F2452FEFBB | Apprenticeship Sponsor | Jun 30, 2014 |
| Stratford, CT | R. Piro Electric, LLC | 3138E31845 | Apprenticeship Sponsor | Jun 30, 2027 |
| Terryville, CT | R. ROSS MECHANICAL INC. | 8EB175433B | Apprenticeship Sponsor | Jun 30, 2027 |
| New Haven, CT | R. S. Petrillo Company, Inc. | 5689717FFC | Apprenticeship Sponsor | Jun 30, 2009 |
| North Haven, CT | R.A. Levine Company | 845EE8AF5C | Apprenticeship Sponsor | Jun 30, 2027 |
| Wolcott, CT | R.A.C. Electric | 965E511D0E | Apprenticeship Sponsor | Jun 30, 2027 |
| Ellington, CT | R.A.C. Plumbing & Heating | C98B0586E4 | Apprenticeship Sponsor | Jun 30, 2009 |
| Groton, CT | R.B. Kent & Son, Inc. | 19D3E50C69 | Apprenticeship Sponsor | Jun 30, 2027 |
| Somers, CT | R.C.S. Electric, LLC | 045B808915 | Apprenticeship Sponsor | Jun 30, 2008 |
| Shelton, CT | R.D. Scinto, Inc. | 64C958F32A | Apprenticeship Sponsor | Jun 30, 2027 |
| North Stonington, CT | R.D. Vandale Electric Co. Inc. | 3EA59EE3F7 | Apprenticeship Sponsor | Jun 30, 2015 |
| Centerbrook, CT | R.E. Godwin & Sons, LLC | 7750EA5525 | Apprenticeship Sponsor | Jun 30, 2027 |
| Burlington, CT | R.E.C. Electric, LLC | 56EF1911E1 | Apprenticeship Sponsor | Jun 30, 2006 |
| Wallingford, CT | R.F. Hass & Sons Inc. | 6B030C41C5 | Apprenticeship Sponsor | Jun 30, 2026 |
| Colchester, CT | R.J. Electric LLC | 5A1031542E | Apprenticeship Sponsor | Jun 30, 2017 |
| Coventry, CT | R.J. Ouellette Plumbing & Heating, Inc. | 0EB717CD49 | Apprenticeship Sponsor | Jun 30, 2018 |
| Meriden, CT | R.J. Patton Co., Inc. | E794B6C170 | Apprenticeship Sponsor | Jun 30, 2004 |
| Norwalk, CT | R.J. Powers Plumbing & Heating Co. | AF95CB3CE9 | Apprenticeship Sponsor | Jun 30, 2007 |
| North Windham, CT | R.J. Riquier, Inc. | AA0AC485AB | Apprenticeship Sponsor | Jun 30, 2022 |
| Hartford, CT | R.K. Insulation Contractors, Inc. | E70F9E13B2 | Apprenticeship Sponsor | Jun 30, 2006 |
| Monroe, CT | R.L. Simansky Electric | EB2B5F9F3E | Apprenticeship Sponsor | Jun 30, 2011 |
| Cos Cob, CT | R.M. Harris Electrical Contractors, Inc. | 358CF2E796 | Apprenticeship Sponsor | Jun 30, 2027 |
| Madison, CT | R.M. Macy Plumbing, LLC | 1241592868 | Apprenticeship Sponsor | Jun 30, 2022 |
| Milford, CT | R.M.S. Electric, LLC | E39CCF5F48 | Apprenticeship Sponsor | Jun 30, 2010 |
| Northford, CT | R.P. Electric, LLC | 75DFFA10E1 | Apprenticeship Sponsor | Jun 30, 2020 |
| Enfield, CT | R.P.S. Associates of New England Inc. | 287566794F | Apprenticeship Sponsor | Jun 30, 2026 |
| Cheshire, CT | R.R. Electric, LLC | CAD39178BB | Apprenticeship Sponsor | Jun 30, 2025 |
| Hartford, CT | R.T. CAPOBIANCO PLUMBING & HEATING INC | D05E292617 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| New London, CT | R11 ELECTRICAL SOLUTIONS LLC | C990DA14EE | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Ellington, CT | RAC Mechanical LLC | 722DD2387C | Apprenticeship Sponsor | Jun 30, 2027 |
| Plainville, CT | Racine Electric, LLC | 24016CB21E | Apprenticeship Sponsor | Jun 30, 2015 |
| Higganum, CT | Raczka Electric, Inc. | 4AE8B1B09E | Apprenticeship Sponsor | Jun 30, 2010 |
| Bristol, CT | Radcliffe Wire, INC. | 2393E1C83A | Apprenticeship Sponsor | Jun 30, 2012 |
| East Hartford, CT | Radiant Electric Company | 0CDB927224 | Apprenticeship Sponsor | Jun 30, 2026 |
| Meriden, CT | Radio Frequency Systems | 9F614C8F85 | Apprenticeship Sponsor | Jun 30, 2013 |
| Milford, CT | Rainmaker Irrigation LLC | 32122CD4BE | Apprenticeship Sponsor | Jun 30, 2013 |
| Lisbon, CT | Rainville Plumbing & Heating | 73B411A70D | Apprenticeship Sponsor | Jun 30, 2006 |
| New Britain, CT | Ralph C. Electric, LLC | BE2C40F3F9 | Apprenticeship Sponsor | Jun 30, 2022 |
| Stamford, CT | Ralph D. Russo Plumbing & Heating | D2C02175D2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ansonia, CT | Ralph Mann & Sons, Inc. | 6151B0F066 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Southington, CT | Ralph P. Warner & Son Plumbing & Heating | B33F477298 | Apprenticeship Sponsor | Jun 30, 2010 |
| Stamford, CT | Ralph R. Sparan Plumbing | 1A6D1D0390 | Apprenticeship Sponsor | Jun 30, 2009 |
| Westport, CT | RAM Alarm Services, Inc. | F6833BE484 | Apprenticeship Sponsor | Jun 30, 2018 |
| Middlefield, CT | Ramar-Hall, Inc. | E061CD3EA8 | Apprenticeship Sponsor | Jun 30, 2019 |
| Danbury, CT | Ramey Electric LLC | 1DBC2A9F70 | Apprenticeship Sponsor | Jun 30, 2020 |
| Montville, CT | RAND-WHITNEY CONTAINERBOARD, LP | E90502B26E | Apprenticeship Sponsor | Jun 30, 2027 |
| Hamden, CT | Random Access Technologies dba Kolram Electric | 6C6D3CA5B5 | Apprenticeship Sponsor | Jun 30, 2012 |
| Stamford, CT | Ranger Electric Service | 37791152A9 | Apprenticeship Sponsor | Jun 30, 2027 |
| West Haven, CT | Rapid Plumbing Service, Inc. | 8BCF835B5A | Apprenticeship Sponsor | Jun 30, 2008 |
| Columbia, CT | Rapid Service LLC | 5094209002 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Milford, CT | Raps Plumbing & Heating, Inc. | F6394AED79 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Berlin, CT | Raptor Scientific | D9ABD52174 | Apprenticeship Sponsor | Jun 30, 2026 |
| Enfield, CT | Rathbun Electric, LLC | BCA6C815BD | Apprenticeship Sponsor | Jun 30, 2023 |
| Bridgeport, CT | Ratick Combustion INC | 5DDE939FD4 | Apprenticeship Sponsor | Jun 30, 2011 |
| Farmington, CT | Ravex Systems, Inc. | 52D75DAB30 | Apprenticeship Sponsor | Jun 30, 2027 |
| Easton, CT | Ray Brown & Sons Electrical Contractors | D433289242 | Apprenticeship Sponsor | Jun 30, 2012 |
| Stratford, CT | Ray Brown Electric, LLC | F2C0F9B264 | Apprenticeship Sponsor | Jun 30, 2027 |
| East Granby, CT | Ray Crane Construction Co. | C54C098FC7 | Apprenticeship Sponsor | Jun 30, 2009 |
| Hamden, CT | Ray Eramo Plumbing & Heating, Inc. | B32001B47A | Apprenticeship Sponsor | Jun 30, 2009 |
| Southport, CT | Ray Flanagan, Inc. | E9AEAEAE8F | Apprenticeship Sponsor | Jun 30, 2024 |
| Shelton, CT | Ray Gooley & Son, Inc. | 55449037DE | Apprenticeship Sponsor | Jun 30, 2004 |
| Darien, CT | Ray McGowan & Sons Plumbing & Heating, LLC | BF73B992E4 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Vernon, CT | Ray Page Plumbing Incorporated | A6F4093D9A | Apprenticeship Sponsor | Jun 30, 2027 |
| Bozrah, CT | Ray Szymanski Electrical Contractor | 8B58A6D5F7 | Apprenticeship Sponsor | Jun 30, 2015 |
| West Haven, CT | Ray's Air Systems, LLC | 4D1921DB9E | Apprenticeship Sponsor | Jun 30, 2027 |
| Redding, CT | Ray's Electric | 8E22050805 | Apprenticeship Sponsor | Jun 30, 2021 |
| Willimantic, CT | Ray's Electric Co. | 6EF4C13AF8 | Apprenticeship Sponsor | Jun 30, 2005 |
| North Windham, CT | Ray-G's Clean Cuts, LLC | 979B2144C2 | Apprenticeship Sponsor | Jun 30, 2024 |
| Bloomfield, CT | RayGinn Mfg, LLC | 7BFE71A7D3 | Apprenticeship Sponsor | Jun 30, 2022 |
| Hamden, CT | Raymon Tool, LLC | BF8CA2340D | Apprenticeship Sponsor | Jun 30, 2021 |
| Milford, CT | RAYZOR ELECTRIC, LLC | 2208A29E00 | Apprenticeship Sponsor | Jun 30, 2027 |
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.