Apprenticeship Sponsor — page 11 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 |
|---|---|---|---|---|
| Oxford, CT | Karotech, Inc. | DE6B588777 | Apprenticeship Sponsor | Jun 30, 2027 |
| Southbury, CT | KAS Electric, Inc. | 016B7A9DD3 | Apprenticeship Sponsor | Jun 30, 2010 |
| East Hartford, CT | KASDEN FUEL | 7C1022FFCF | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Orange, CT | Kashmire | F976DAD6CF | Apprenticeship Sponsor | Jun 30, 2027 |
| Danbury, CT | Kate Emilies A Salon llc | B90DBF7210 | Apprenticeship Sponsor | Jun 30, 2027 |
| Andover, CT | Kaulback Design Construction | 942511281D | Apprenticeship Sponsor | Jun 30, 2014 |
| New Canaan, CT | Kavallines Electric, LLC | F6D519827B | Apprenticeship Sponsor | Jun 30, 2026 |
| Tolland, CT | Kawalec Plumbing & Heating, LLC | F15B36BF21 | Apprenticeship Sponsor | Jun 30, 2005 |
| Stratford, CT | Kay Electrical Contractors, LLC | 9C391184B9 | Apprenticeship Sponsor | Jun 30, 2010 |
| Winchester, CT | KayCon Electric LLC | AE9F61E3D7 | Apprenticeship Sponsor | Jun 30, 2024 |
| Andover, CT | KB Rooter Plumbing, LLC | B5997EF190 | Apprenticeship Sponsor | Jun 30, 2013 |
| South Windsor, CT | KEBALO ELECTRIC COMPANY INC | 96043B72DD | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Brookfield, CT | Keeler Electric, Inc. | A39BF97EA7 | Apprenticeship Sponsor | Jun 30, 2010 |
| East Hartland, CT | Keep It Green Irrigation LLC | 70D3B2233E | Apprenticeship Sponsor | Jun 30, 2008 |
| Danielson, CT | KEITH'S HEATING & COOLING | 7BE0A52078 | Apprenticeship Sponsor | Jun 30, 2017 |
| New Milford, CT | Kelley's Heating & Cooling, LLC | 7BD612FB29 | Apprenticeship Sponsor | Jun 30, 2027 |
| South Windsor, CT | Kellner Plumbing & Heating LLC | 9DA328A7ED | Apprenticeship Sponsor | Jun 30, 2017 |
| Cromwell, CT | Kellsec, LLC | 2C5F336E0D | Apprenticeship Sponsor | Jun 30, 2027 |
| Suffield, CT | Kelly Refrigeration & Freezer, INC. | 85B63B0B05 | Apprenticeship Sponsor | Jun 30, 2011 |
| Stratford, CT | Kelly's Well Pump Service | BF224ED330 | Apprenticeship Sponsor | Jun 30, 2027 |
| Newtown, CT | KEN BURNS ELECTRICAL CONTRACTORS, INC. | 8E66B0D5B7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stratford, CT | KEN PARKER PLUMBING & HEATING | 19EC9956CE | Apprenticeship Sponsor | Jun 30, 2025 |
| Putnam, CT | Ken's Electric LLC | 9CCA8AD3D3 | Apprenticeship Sponsor | Jun 30, 2004 |
| Orange, CT | Kenco Cable Contractors Inc. DBA: Kenco Home Systems | C6D7781705 | Apprenticeship Sponsor | Jun 30, 2016 |
| Ridgefield, CT | Kendall Electric Company | 6500BA0BF8 | Apprenticeship Sponsor | Jun 30, 2008 |
| Newtown, CT | Kendro Laboratory Products | 4C3245E3EB | Apprenticeship Sponsor | Jun 30, 2004 |
| Forestville, CT | Kennedy Electrical Contractors, Inc. | 39CA1BD775 | Apprenticeship Sponsor | Jun 30, 2016 |
| Hartford, CT | Kennedy's Plumbing & Heating Inc. | FEAD8A6DDC | Apprenticeship Sponsor | Jun 30, 2022 |
| Berlin, CT | KENNEDY, GUSTAFSON & COLE, INC. | 1F6CE5F01C | Apprenticeship Sponsor | Jun 30, 2027 |
| New Milford, CT | Kenneth Ash Electric | 534AD35271 | Apprenticeship Sponsor | Jun 30, 2009 |
| Stratford, CT | Kenneth Criscione, LLC | D5943BF214 | Apprenticeship Sponsor | Jun 30, 2012 |
| Ridgefield, CT | Kenney Electrical Services, LLC | B2467B4382 | Apprenticeship Sponsor | Jun 30, 2027 |
| Durham, CT | KENSINGTON GLASS & FRAMING CO INC | 1ECB9039F8 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Kensington, CT | Kensington Mechanical Services, LLC | 5F0436E0C2 | Apprenticeship Sponsor | Jun 30, 2023 |
| Kent, CT | Kent Glass, LLC | BCCE3EFF1D | Apprenticeship Sponsor | Jun 30, 2019 |
| Kent, CT | Kent Horticultural Services, Inc. | D0A66227FA | Apprenticeship Sponsor | Jun 30, 2013 |
| Bridgeport, CT | KERIGAN'S FUEL INC | FD52336582 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Terryville, CT | KES Electric LLC | 65714F3668 | Apprenticeship Sponsor | Jun 30, 2009 |
| Hartford, CT | Kessler Construction Co., Inc. | 3D6865A8F7 | Apprenticeship Sponsor | Jun 30, 2008 |
| Hartford, CT | Kessler Installation Corporation | 3877F93193 | Apprenticeship Sponsor | Jun 30, 2011 |
| Bridgeport, CT | Kevin Bria Plumbing & Heating | 7A701BA8F0 | Apprenticeship Sponsor | Jun 30, 2009 |
| Durham, CT | Kevin Johnson Enterprises, LLC | 1443084FF6 | Apprenticeship Sponsor | Jun 30, 2024 |
| Norwalk, CT | Kevin Simpson Plumbing LLC | 7EC64E4927 | Apprenticeship Sponsor | Jun 30, 2028 |
| Old Lyme, CT | Key Electric LLC | 6E478C98D5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Plainville, CT | KGS Associates, LLC | BC21ADC515 | Apprenticeship Sponsor | Jun 30, 2025 |
| Barkhamsted, CT | KH Electrical LLC | 12F7525BAA | Apprenticeship Sponsor | Jun 30, 2026 |
| Fairfield, CT | Khannouchi Electric LLC | EBB8B12362 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bethel, CT | Kilco Electric, LLC | B90F51DBCF | Apprenticeship Sponsor | Jun 30, 2007 |
| New Milford, CT | Kimberly-Clark Corporation | 267E7859AA | Apprenticeship Sponsor | Jun 30, 2023 |
| Newington, CT | King Air Conditioning, LLC | 5D375E78E6 | Apprenticeship Sponsor | Jun 30, 2027 |
| West Haven, CT | King Electric, LLC | 0EC209BD53 | Apprenticeship Sponsor | Jun 30, 2009 |
| Norwalk, CT | KING INDUSTRIES, INC. ROBERT A. KING | 5EC197A2E3 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Bridgeport, CT | Kingdom Cutters Barbershop | 1DE5AFE0E9 | Apprenticeship Sponsor | Jun 30, 2023 |
| Naugatuck, CT | Kingsbury Plumbing & Heating, Inc. | 015FFB70F5 | Apprenticeship Sponsor | Jun 30, 2026 |
| New Britain, CT | Kinky Winks CT LLC | 086677E1AA | Apprenticeship Sponsor | Jun 30, 2026 |
| Monroe, CT | Kinsella Electric, LLC | 9C31B7CCD3 | Apprenticeship Sponsor | Jun 30, 2021 |
| Seymour, CT | Kirk Products Company, Inc. | 82A5DFEC2C | Apprenticeship Sponsor | Jun 30, 2019 |
| Norwalk, CT | KLING BROTHERS BUILDERS LLC | BC42B9C6DF | Apprenticeship Sponsor | Jun 30, 2026 |
| Milford, CT | KLK Electric | 952E9AE92F | Apprenticeship Sponsor | Jun 30, 2016 |
| New Fairfield, CT | KM Electrical, LLC | BC2AC32075 | Apprenticeship Sponsor | Jun 30, 2027 |
| Prospect, CT | KMA Electronic Security, LLC | B77D418485 | Apprenticeship Sponsor | Jun 30, 2010 |
| Branford, CT | KMB Electrical Services LLC | 5AB7F4CE05 | Apprenticeship Sponsor | Jun 30, 2027 |
| Tolland, CT | KMB Jaworski Plumbing & Remodeling, LLC | 93708CF746 | Apprenticeship Sponsor | Jun 30, 2021 |
| Darien, CT | KMG Electrical Contractors, Inc. | A2AD50B1E0 | Apprenticeship Sponsor | Jun 30, 2007 |
| Bristol, CT | KMK Electric LLC | EF0C60E7DC | Apprenticeship Sponsor | Jun 30, 2008 |
| North Haven, CT | KMK Insulation, Inc. | 4170530BA3 | Apprenticeship Sponsor | Jun 30, 2015 |
| Middlefield, CT | KMK Plumbing & Heating | 84E5806678 | Apprenticeship Sponsor | Jun 30, 2026 |
| Manchester, CT | KMV Plumbing LLC | E3575EBCF8 | Apprenticeship Sponsor | Jun 30, 2014 |
| Gales Ferry, CT | Kneeland Heating & Cooling, LLC | 4696AA55B9 | Apprenticeship Sponsor | Jun 30, 2027 |
| Rocky Hill, CT | Knight Electric | 3BA50C3EA3 | Apprenticeship Sponsor | Jun 30, 2014 |
| East Hartford, CT | Knight Investments, LLC | B21E89A984 | Apprenticeship Sponsor | Jun 30, 2020 |
| North Salem, NY | Knight Security Sytems | A3399BA32B | Apprenticeship Sponsor | Jun 30, 2026 |
| Waterford, CT | KOBYLUCK CONSTRUCTION COMPANY | BFFA446514 | Major Contractor + 1 more | Jun 30, 2027 |
| Vernon, CT | Koch Plumbing LLC | 2131CCD8DE | Apprenticeship Sponsor | Jun 30, 2009 |
| Bozrah, CT | Kofkoff Egg Farms | ED5A2DA2AD | Apprenticeship Sponsor | Jun 30, 2012 |
| Fairfield, CT | Kolbusz Electric Co. | 7288D9685A | Apprenticeship Sponsor | Jun 30, 2022 |
| Waterford, CT | Koller Turf Irrigation | 4A85F38504 | Apprenticeship Sponsor | Jun 30, 2013 |
| East Windsor, CT | Koma Precision | 028A609C94 | Apprenticeship Sponsor | Jun 30, 2026 |
| East Berlin, CT | Konecranes, Inc. | 9BA6A49DC5 | Apprenticeship Sponsor | Jun 30, 2018 |
| Torrington, CT | Konopka Electric LLC | 4F6F48006C | Apprenticeship Sponsor | Jun 30, 2027 |
| Yantic, CT | Konow Electric | FC90B345DB | Apprenticeship Sponsor | Jun 30, 2011 |
| Southbury, CT | Kosheluk Pump Service, Inc. | 0F0A479BA7 | Apprenticeship Sponsor | Jun 30, 2026 |
| Colchester, CT | Koss Construction, LLC | D9CB599249 | Apprenticeship Sponsor | Jun 30, 2021 |
| Fairfield, CT | KOSTANTINO ELECTRIC CORP. | 3F3D0E4A55 | Apprenticeship Sponsor | Jun 30, 2026 |
| North Haven, CT | KOZLOSKI PLUMBING LLC | 183724098E | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Baltic, CT | KRAECO Electric, INC. | 55D1FC74D7 | Apprenticeship Sponsor | Jun 30, 2010 |
| New Haven, CT | Krall Coal & Oil Company, Inc. | 0BF3CC9193 | Apprenticeship Sponsor | Jun 30, 2022 |
| Waterbury, CT | Kreation Beauty Salon | D027800D11 | Apprenticeship Sponsor | Jun 30, 2025 |
| Stamford, CT | Krk Plumbing And Heating | 7AC43A5039 | Apprenticeship Sponsor | Jun 30, 2027 |
| Middletown, CT | KRONENBERGER & SONS RESTORATION, LLC. KRONENBERGER & SONS RESTORATION LLC | A47D58A46D | Asbestos Contractor + 4 more | Sep 30, 2027 |
| Suffield, CT | KRUPA OIL CO | A95C0054B2 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Suffield, CT | Krystal Woods Developers, LLC | BCA798FC24 | Apprenticeship Sponsor | Jun 30, 2011 |
| Bolton, CT | KSB Electric, LLC | CDAABA5AF4 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | KT Electric, LLC | 031BC32A19 | Apprenticeship Sponsor | Jun 30, 2017 |
| Oxford, CT | KTI Utility Construction & Maintenance, LLC | 9C6EDC72BA | Apprenticeship Sponsor | Jun 30, 2027 |
| Newington, CT | Kud-Pro Plumbing & Drain Cleaning, LLC | B582E8EB2D | Apprenticeship Sponsor | Jun 30, 2027 |
| East Hartford, CT | Kurker Electric, Inc. | DBE433677B | Apprenticeship Sponsor | Jun 30, 2022 |
| East Hartford, CT | KV MECHANICAL CONTRACTORS, INC. | 030329EF12 | Apprenticeship Sponsor | Jun 30, 2025 |
| Orange, CT | KX Industries LP | 32A4B928FA | Apprenticeship Sponsor | Jun 30, 2007 |
| Mystic, CT | Kyrsten Mae Artistry LLC | 57B0765553 | Apprenticeship Sponsor | Jun 30, 2027 |
| Middlefield, CT | L & I Refrigeration, Inc. | 92015DBC44 | Apprenticeship Sponsor | Jun 30, 2026 |
| Stratford, CT | L & L Electric | B74B7FEE11 | Apprenticeship Sponsor | Jun 30, 2010 |
| Goshen, CT | L & L MECHANICAL, LLC | 94D5E430C7 | Apprenticeship Sponsor | Jun 30, 2027 |
| North Branford, CT | L & M Electric, LLC | CFCF8D9348 | Apprenticeship Sponsor | Jun 30, 2027 |
| East Woodstock, CT | L & M Refrigeration | 3E92C632F8 | Apprenticeship Sponsor | Jun 30, 2017 |
| Colchester, CT | L & M Sheetmetal, LLC | 3C3DADB0E6 | Apprenticeship Sponsor | Jun 30, 2018 |
| Torrington, CT | L & P Plumbing & Well Service, LLC | AE8C14870C | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | L & R Mechanical Services, LLC | 970356F2EC | Apprenticeship Sponsor | Jun 30, 2027 |
| Westport, CT | L H GAULT & SON L H GAULT & SON INC | B0C8955FF6 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| New Haven, CT | L HOLZNER ELECTRIC CO | 01CDFCF0CC | Major Contractor + 1 more | Jun 30, 2027 |
| Middletown, CT | L Train Electric, LLC | 0BA6C756D4 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| South Glastonbury, CT | L V FUEL CO LLC | 8A813CA1B9 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Meriden, CT | L. Suzio Concrete Company Operatoring Engineers JATC 478 | 8A86670E02 | Apprenticeship Sponsor | Jun 30, 2019 |
| Stamford, CT | L.C. Schede & Sons, Inc. | 090D1B196B | Apprenticeship Sponsor | Jun 30, 2027 |
| Danbury, CT | L.G. Electric LLC | BE235AA05F | Apprenticeship Sponsor | Jun 30, 2012 |
| Berlin, CT | L.J. ELECTRIC CO. INC. | 5E7A4BA1E2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Manchester, CT | L.M. Gill Welding & Manufacturing, LLC | AAFBB1A918 | Apprenticeship Sponsor | Jun 30, 2027 |
| Fairfield, CT | L.P. Topar Oil Co. | D2BFCA4C04 | Apprenticeship Sponsor | Jun 30, 2015 |
| Madison, CT | L.R.A. Electric Inc. | 904C8B5A94 | Apprenticeship Sponsor | Jun 30, 2010 |
| Unionville, CT | La Bella Chateau Salon & Spa | 8A01BBCE28 | Apprenticeship Sponsor | — |
| Rocky Hill, CT | LA Mechanical Services, LLC | 3A6CC9ECD0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Hartford, CT | LA Plumbing & Heating LLC | 79201A77CB | Apprenticeship Sponsor | Jun 30, 2025 |
| Bristol, CT | LAB Security Systems Corp. | 0F7AF1D0E0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Watertown, CT | Labbe Heating & Cooling, LLC | 5945E9B6B6 | Apprenticeship Sponsor | Jun 30, 2026 |
| Norwalk, CT | Labco Heating & A/C, LLC. | 18DE34CA00 | Apprenticeship Sponsor | Jun 30, 2022 |
| Coventry, CT | LaBelle Electric LLC | C0A3294CA4 | Apprenticeship Sponsor | Jun 30, 2004 |
| Norwalk, CT | LaBonte Plumbing | D93BCCD852 | Apprenticeship Sponsor | Jun 30, 2026 |
| Milford, CT | Labozzo Electric Corp. | 638AD787A2 | Apprenticeship Sponsor | Jun 30, 2024 |
| Chaplin, CT | LaCasse Electric | EE5D1308C3 | Apprenticeship Sponsor | Jun 30, 2018 |
| Harwinton, CT | Lafferty Enterprises | 2D886C1F0C | Apprenticeship Sponsor | Jun 30, 2025 |
| North Windham, CT | LaFlamme Plumbing & Heating, LLC | 46979C20BE | Apprenticeship Sponsor | Jun 30, 2025 |
| Danielson, CT | LAFLECHE & SONS ELECTRIC LLC | 4B27C9D62D | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Auburn, MA | Lafleur Electrical Co., Inc. | 3B83D604EC | Apprenticeship Sponsor | Jun 30, 2021 |
| Windsor, CT | LaFleur's Oil Heat Specialists, LLC | 0175A16FFC | Apprenticeship Sponsor | Jun 30, 2011 |
| Danielson, CT | LaFollette Electric, Inc. | D507CEB859 | Apprenticeship Sponsor | Jun 30, 2006 |
| Thompson, CT | LAFRAMBOISE WELL DRILLING, INC. | F8F789027B | Apprenticeship Sponsor | Jun 30, 2027 |
| Lisbon, CT | Lagace Electric LLC | 8A531DB658 | Apprenticeship Sponsor | Jun 30, 2027 |
| Milford, CT | Lagasse Electric, LLC | 59D6C8A1BF | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | LAKE COMPOUNCE FESTIVAL FUN PARKS DBA LAKE COMPOUNCE | 52F0761B87 | Operator of Weighing & Measuring Devices + 4 more | Jul 31, 2027 |
| Avon, CT | Lakeside Electric, LLC | B2B1253777 | Apprenticeship Sponsor | Jun 30, 2018 |
| Old Saybrook, CT | Laliberte Electric LLC | 543978BC9C | Apprenticeship Sponsor | Jun 30, 2009 |
| Quaker Hill, CT | Lamb Mechanical, LLC | 2E2ECB4462 | Apprenticeship Sponsor | Jun 30, 2010 |
| Oxford, MA | LaMountain Bros Inc. | 014C6C4DF3 | Demolition Contractor + 2 more | Sep 30, 2027 |
| Ledyard, CT | Lamphere Plumbing & Heating | 4675A64395 | Apprenticeship Sponsor | Jun 30, 2012 |
| Milford, CT | Land & Sea Security Systems, LLC | EC1FFDD66D | Apprenticeship Sponsor | Jun 30, 2009 |
| Danbury, CT | Landmark Air Systems, Inc. | D7887201CB | Apprenticeship Sponsor | Jun 30, 2027 |
| Monroe, CT | Landmark Electric, LLC | 3B91D9E58C | Apprenticeship Sponsor | Jun 30, 2027 |
| New Britain, CT | Landmark Electrical Contractors LLC | 7108C81844 | Apprenticeship Sponsor | Jun 30, 2027 |
| Windsor Locks, CT | Landry Communications, LLC | 3009EA504F | Apprenticeship Sponsor | Jun 30, 2023 |
| Torrington, CT | Landucci Heating & Cooling Inc. | 5C8B135A20 | Apprenticeship Sponsor | Jun 30, 2024 |
| Derby, CT | Lane Electrical Partners | AC0B8B3F82 | Apprenticeship Sponsor | Jun 30, 2026 |
| South Windsor, CT | LANE VALENTE INDUSTRIES INC | AF61A19143 | Major Contractor + 1 more | Jun 30, 2027 |
| Bridgeport, CT | LANESE CONSTRUCTION INC | 04A57DAD26 | Major Contractor + 3 more | Jun 30, 2027 |
| Morris, CT | Langer Electric LLC | A80BC952A3 | Apprenticeship Sponsor | Jun 30, 2009 |
| Stafford Springs, CT | Langworthy Electrical Contractors | 77E163B92E | Apprenticeship Sponsor | Jun 30, 2007 |
| Manchester, CT | Langworthy Electrical Services, LLC | A2F338F5B5 | Apprenticeship Sponsor | Jun 30, 2021 |
| Glastonbury, CT | Lantern Electrical, LLC | 9D41FD8044 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Goshen, CT | LaPlaca Oil, Inc. | 05170095F7 | Apprenticeship Sponsor | Jun 30, 2025 |
| Plainfield, CT | LaPorte & Sons Plumbing | C2B5E67D61 | Apprenticeship Sponsor | Jun 30, 2017 |
| Bolton, CT | Larco Machine Company, Inc. | 5E26F423F0 | Apprenticeship Sponsor | Jun 30, 2007 |
| Meriden, CT | LAROSA BUILDING GROUP LLC | EC6EA3EC7A | Major Contractor + 4 more | Jun 30, 2027 |
| Meriden, CT | LaRosa Construction Co | 18720D4222 | Demolition Contractor + 1 more | Mar 31, 2027 |
| Meriden, CT | LAROSA EARTH GROUP LLC | C5F9F08052 | Major Contractor + 1 more | Jun 30, 2027 |
| Washington Depot, CT | Larry Low Electric LLC | 0AA9045701 | Apprenticeship Sponsor | Jun 30, 2020 |
| New Britain, CT | Las Dominicanas Salon | BFC13C013C | Apprenticeship Sponsor | Jun 30, 2020 |
| Stratford, CT | Lasko Irrigation Contractors, LLC | DE8543C0DA | Apprenticeship Sponsor | Jun 30, 2009 |
| Plainville, CT | LASSEN HEATING & COOLING LLC | 3DD5F0DF0F | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Pequabuck, CT | Lassy Technical Machining, LLC | 1F5A8C0ED1 | Apprenticeship Sponsor | Jun 30, 2009 |
| Stratford, CT | Lastra Electric LLC | D96ACE4510 | Apprenticeship Sponsor | Jun 30, 2027 |
| Hartford, CT | Latec, LLC | 9846DAA8DD | Apprenticeship Sponsor | Jun 30, 2019 |
| Bristol, CT | Lauretti Plumbing Installs LLC | 823B719E28 | Apprenticeship Sponsor | Jun 30, 2014 |
| Thomaston, CT | Lavergne Electric | 84F3946452 | Apprenticeship Sponsor | Jun 30, 2026 |
| Ludlow, MA | Lavertue Electric, Inc. | 53D12742DE | Apprenticeship Sponsor | Jun 30, 2019 |
| Canton, CT | Lawler Electric & Design, Inc. | A2E69CDFD0 | Apprenticeship Sponsor | Jun 30, 2013 |
| New London, CT | LAWRENCE + MEMORIAL HOSPITAL | 8D87815F57 | General Hospital + 3 more | Mar 31, 2027 |
| Milford, CT | Lawrence Electric, LLC | B49F5BE7F2 | Apprenticeship Sponsor | Jun 30, 2021 |
| Woodstock, CT | Lawrence Salo Electrical Contractor, Inc. | AADC0192D5 | Apprenticeship Sponsor | Jun 30, 2009 |
| New Haven, CT | LAYDON INDUSTRIES LLC | 11E33A5E4C | Demolition Contractor + 4 more | Jun 30, 2027 |
| North Haven, CT | Layer #1 Communications LLC | 0C9A2AB9F0 | Apprenticeship Sponsor | Jun 30, 2007 |
| Fairfield, CT | Lazor Electric LLC | 740D86D729 | Apprenticeship Sponsor | Jun 30, 2008 |
| Manchester, CT | LB Electrical Services, LLC | 542DEBAE5A | Apprenticeship Sponsor | Jun 30, 2017 |
| New Haven, CT | LB Fire Protection | B50F6372B2 | Apprenticeship Sponsor | Jun 30, 2019 |
| Brookfield, CT | LB's of Brookfield | 1C94E96499 | Apprenticeship Sponsor | Jun 30, 2025 |
| Brewster, NY | LBR Mechanical Corp | A20581A70A | Apprenticeship Sponsor | Jun 30, 2027 |
| Madison, CT | LC Electric, Inc. | 6E35FDE675 | Apprenticeship Sponsor | Jun 30, 2027 |
| East Hartford, CT | LC MECHANICAL, LLC | A8A94674DA | Apprenticeship Sponsor | Jun 30, 2027 |
| Danbury, CT | LEAHY'S FUELS INC | 20FE6DEF34 | Home Heating Fuel Dealer + 4 more | Sep 30, 2027 |
| Avon, CT | Leary Electrical Services, LLC | 53CBCA7EE8 | Apprenticeship Sponsor | Jun 30, 2027 |
| Seymour, CT | LeClaire Heating & Air LLC | 183EDD6551 | Apprenticeship Sponsor | Jun 30, 2022 |
| East Hartford, CT | LED Electric, LLC | 8112716935 | Apprenticeship Sponsor | Jun 30, 2019 |
| Groton, CT | Ledge Light Electric, LLC | 7F7E8A9AEE | Apprenticeship Sponsor | Jun 30, 2026 |
| Groton, CT | Ledge Light Plumbing & Heating, LLC | 8E3C0C3CA5 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Milford, CT | Lee Seward Plumbing & Heating Inc. | EBCB4CE4CC | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | Lee Spring Company | D6154ABF64 | Apprenticeship Sponsor | Jun 30, 2023 |
| Middletown, CT | Legacy Mechanical Group, Inc., The | 6F29277A08 | Apprenticeship Sponsor | Jun 30, 2013 |
| Vernon, CT | Legendary Looks Barbershop | E104001A83 | Apprenticeship Sponsor | Jun 30, 2025 |
| Meriden, CT | Legendz Barbershop, LLC | 359135D5C6 | Apprenticeship Sponsor | Jun 30, 2027 |
| Middletown, CT | Leggett & Platt Aerospace | 02753876D9 | Apprenticeship Sponsor | Jun 30, 2022 |
| Enfield, CT | Lego Systems Inc. | EE5CE6C695 | Apprenticeship Sponsor | Jun 30, 2018 |
| Waterbury, CT | Lehigh Fuel, Inc. | 53DBDAD573 | Apprenticeship Sponsor | Jun 30, 2014 |
| New Haven, CT | Leila Day Nurseries Incorporated | 94E6F5A71A | Apprenticeship Sponsor | Jun 30, 2026 |
| Windsor, CT | Leipold, Inc. | 41E24A6CC5 | Apprenticeship Sponsor | Jun 30, 2018 |
| Hartford, CT | LeMay Oil Company, Inc. | 1C81E3EB36 | Apprenticeship Sponsor | Jun 30, 2012 |
| New Hartford, CT | LeMieux Mechanical, LLC | 3926F8F6B3 | Apprenticeship Sponsor | Jun 30, 2016 |
| Madison, CT | Lemley Electric, LLC | 49E62FFB38 | Apprenticeship Sponsor | Jun 30, 2016 |
| Trumbull, CT | Lenahans Plumbing and Heating | 39202EEB53 | Apprenticeship Sponsor | Jun 30, 2024 |
| Hebron, CT | Lenco Electrical Contractors | C328B0A2A6 | Apprenticeship Sponsor | Jun 30, 2025 |
| North Stonington, CT | Lenihan Electric LLC | 0A7A462A58 | Apprenticeship Sponsor | Jun 30, 2027 |
| East Windsor, CT | LENNOX NATIONAL ACCOUNT SERVICES, LLC | EF3A309E80 | Apprenticeship Sponsor | Jun 30, 2027 |
| Waterford, CT | Lentz Plumbing Heating & Air Conditioning LLC | 0FB38DB029 | Apprenticeship Sponsor | Jun 30, 2008 |
| Kent, CT | Lenz Electric | 9F101152BF | Apprenticeship Sponsor | Jun 30, 2013 |
| Bridgeport, CT | Leo Construction | E68C2D4147 | Apprenticeship Sponsor | Jun 30, 2012 |
| South Windsor, CT | Leo J. Bond Plumbing & Heating | BC75E0DB04 | Apprenticeship Sponsor | Jun 30, 2017 |
| Canterbury, CT | LEPINE & FAMILY ELECTRIC, LLC | 2BA12566A8 | Apprenticeship Sponsor | Jun 30, 2024 |
| Burlington, CT | LeSage Plumbing LLC | 0BC3B3661F | Apprenticeship Sponsor | Jun 30, 2020 |
| Norwalk, CT | Lesko Plumbing & Heating, LLC | 84639EF78C | Apprenticeship Sponsor | Jun 30, 2020 |
| Lebanon, CT | Lessard Air Conditioning & Heating LLC | DD5E102053 | Apprenticeship Sponsor | Jun 30, 2007 |
| Tolland Ct 06084, CT | Lestage Heating and Cooling, LLC | 52E98CBEBB | Apprenticeship Sponsor | Jun 30, 2026 |
| Bristol, CT | Letalien Electric Co. LLC | 174A3DCFDC | Apprenticeship Sponsor | Jun 30, 2008 |
| Terryville, CT | LeVasseur Electric and Construction LLC | FA4E656E84 | Apprenticeship Sponsor | Jun 30, 2005 |
| New Milford, CT | Levay Electric LLC | 734A7D97FA | Apprenticeship Sponsor | Jun 30, 2004 |
| Trumbull, CT | LEVCO TECH INC | A840B49176 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Killingly, CT | Levesque Electric, LLC | 0E7D9C6027 | Apprenticeship Sponsor | Jun 30, 2023 |
| Northford, CT | Lewin Electric, Inc. | 5DED2B5228 | Apprenticeship Sponsor | Jun 30, 2025 |
| North Grosvenordale, CT | Lewis Electric | 358B9899E1 | Apprenticeship Sponsor | Jun 30, 2027 |
| Hartford, CT | Lewis Electrical Services, LLC | A21C2B2174 | Apprenticeship Sponsor | Jun 30, 2014 |
| Fairfield, CT | Lexco, Inc. | 4D214C3DB2 | Apprenticeship Sponsor | Jun 30, 2011 |
| Watertown, CT | LF Electric LLC | B9B30B35D2 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Britain, CT | LG Cooling & Heating, LLC | FAAC0A4A34 | Apprenticeship Sponsor | Jun 30, 2022 |
| Bridgeport, CT | Liberty Auto & Electric Company, Inc. | 5AC2A276E1 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Middletown, CT | Liberty Bank | 575237B782 | Apprenticeship Sponsor + 2 more | Jun 30, 2020 |
| South Windsor, CT | Liberty Landscapes, LLC | 9F0DDE7977 | Pesticide Application Business Registration + 2 more | Aug 31, 2027 |
| Waterford, CT | Liberty Mechanical Inc. | 35122B06B3 | Apprenticeship Sponsor | Jun 30, 2011 |
| Greenwich, CT | Liberty P & H LLC | BAB7CE9BC2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ellington, CT | LIBERTY PLUMBING, LLC | 71E9C3F36D | Apprenticeship Sponsor | Jun 30, 2027 |
| Terryville, CT | Lickwar Electric LLC | 64B8ACF1BA | Apprenticeship Sponsor | Jun 30, 2026 |
| Danielson, CT | Lifeway Mobility Freedom Lifts LLC | 4756094A06 | Apprenticeship Sponsor | Jun 30, 2027 |
| Old Saybrook, CT | Lighthouse Electric, LLC | F59CCDF874 | Apprenticeship Sponsor | Jun 30, 2027 |
| Cromwell, CT | Lighthouse Enterprises, Inc. | C9BC7BF434 | Apprenticeship Sponsor | Jun 30, 2027 |
| Norwalk, CT | LIGHTHOUSE HEATING & COOLING, LLC | 9F6487A2A8 | Apprenticeship Sponsor | Jun 30, 2027 |
| Wilmington, MA | Lighting Retrofit Services, Inc. | 95E6423F15 | Apprenticeship Sponsor | Jun 30, 2026 |
| Waterbury, CT | Lighting Services Inc | 76A20103DC | Apprenticeship Sponsor | Jun 30, 2027 |
| Barkhamsted, CT | Lightstat Inc. | 5A15821F91 | Apprenticeship Sponsor | Jun 30, 2018 |
| Bridgeport, CT | Lightyear Electric & Remodel LLC | 37A9982318 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Derby, CT | Limelight Systems | D280FF513F | Apprenticeship Sponsor | Jun 30, 2011 |
| Windsor, CT | Limitless Electric LLC | 88854757E1 | Apprenticeship Sponsor | Jun 30, 2027 |
| Manchester, CT | Limitless Mechanical Services LLC | 4892E79468 | Apprenticeship Sponsor | Jun 30, 2027 |
| Alpharetta, GA | LIN R ROGERS ELECTRICAL CONTRACTORS INC | A42AE6F254 | Major Contractor + 1 more | Jun 30, 2027 |
| Canaan, CT | LINDELL FUELS INC | 431B3CCE6F | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Brimfield, MA | Lindsay Electrical Contractors | 871740C8F4 | Apprenticeship Sponsor | Jun 30, 2014 |
| Stratford, CT | LINDSEY'S HOUSE EARLY LEARNING CENTER | 071AA3A7D2 | Child Care Center + 1 more | Jan 31, 2029 |
| Waterbury, CT | LINE ELECTRICAL CONTRACTORS, INC. | 42C6C2329E | Apprenticeship Sponsor | Jun 30, 2009 |
| Wolcott, CT | Line Manufacturing | ABBA48BDCA | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | Linear Engineering LLC | 2E8ED566F7 | Apprenticeship Sponsor | Jun 30, 2012 |
| New Britain, CT | LINK MECHANICAL SERVICES, INC. | EC7577B6B2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Orange, CT | Linsley Electric Inc. | 9A13FBAABD | Apprenticeship Sponsor | Jun 30, 2026 |
| Wolcott, CT | Lion Volt Electric, LLC | 12E0F1A705 | Apprenticeship Sponsor | Jun 30, 2025 |
| Pelham, NY | LIPPOLIS ELECTRIC, INC. | 6529AFCD7E | Apprenticeship Sponsor | Jun 30, 2025 |
| Plainville, CT | Lipski Electric | 0706A6BE57 | Apprenticeship Sponsor | Jun 30, 2007 |
| Litchfield, CT | Litchfield County Electric, Inc. | 0C9919867A | Apprenticeship Sponsor | Jun 30, 2009 |
| New Milford, CT | Litchfield Hills Plumbing, LLC | 025401B893 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bethlehem, CT | Little Town Mechanical Contractors, Inc. | 2BA765181F | Apprenticeship Sponsor | Jun 30, 2018 |
| Norwalk, CT | Live-Wire-Electric, LLC | 8C4E0238AB | Apprenticeship Sponsor | Jun 30, 2025 |
| Norwich, CT | LJ All Star Cuts Barbershop, LLC | A39EADD728 | Apprenticeship Sponsor | Jun 30, 2025 |
| Burlington, CT | LMH Electric LLC | D522E80E9D | Apprenticeship Sponsor | Jun 30, 2027 |
| Milford, CT | Logan Commercial Service, Inc. | F0CC55AE61 | Apprenticeship Sponsor | Jun 30, 2018 |
| Danbury, CT | Lombardi Plumbing & Heating, LLC | 7952D0B1C9 | Apprenticeship Sponsor | Jun 30, 2007 |
| Enfield, CT | Londo Plumbing LLC | 3EE89180DF | Apprenticeship Sponsor | Jun 30, 2025 |
| Clinton, CT | Long Hill Energy, LLC | A88B9284E9 | Apprenticeship Sponsor | Jun 30, 2026 |
| Enfield, CT | LONGHI LANDSCAPE CONSTRUCTION & FARM INC | FA2E8A844C | New Home Construction Contractor + 2 more | Mar 31, 2027 |
| Stratford, CT | Longo Electric, Inc. | 27B18572F3 | Apprenticeship Sponsor | Jun 30, 2027 |
| Wilton, CT | Loren Findorak Drilling, Inc. | EDDEC5C81C | Apprenticeship Sponsor | Jun 30, 2015 |
| Torrington, CT | Lorenzo Plumbing & Heating LLC | 6C9CA198B6 | Apprenticeship Sponsor | Jun 30, 2024 |
| Danielson, CT | Lou Mayo Plumbing and Heating | 7469BB1C52 | Apprenticeship Sponsor | Jun 30, 2027 |
| Sharon, CT | Loucks Electric, LLC | A0E5DBEB51 | Apprenticeship Sponsor | Jun 30, 2016 |
| North Haven, CT | Louis D'amora Electrical Services, LLC | 91F2317CBD | Apprenticeship Sponsor | Jun 30, 2019 |
| Plainville, CT | LOUREIRO ENGINEERING ASSOCIATES INC | 79936CCBF0 | Landscape Architecture Firm + 4 more | Jul 31, 2027 |
| Enfield, CT | LOUTH CALLAN RENEWABLES LLC | C8FD2E212C | Major Contractor + 1 more | Jun 30, 2027 |
| Derby, CT | Love Hunter Watches, LLC | 584D2645E5 | Apprenticeship Sponsor | Jun 30, 2024 |
| Broad Brook, CT | Lovett Heating and Cooling LLC | 90003AC45F | Apprenticeship Sponsor | Jun 30, 2027 |
| Westbrook, CT | Lovine Electric | 59264AD6B9 | Apprenticeship Sponsor | Jun 30, 2006 |
| Hartford, CT | LPS Lawson Power Source | 1C7C7FD7D0 | Apprenticeship Sponsor | Jun 30, 2027 |
| South Windsor, CT | LPT1 Computers, LLP | EABCDFE34D | Apprenticeship Sponsor | Jun 30, 2009 |
| Granby, CT | LS Remodeling LLC | C4C4EDCDDE | Apprenticeship Sponsor | Jun 30, 2009 |
| Wilton, CT | Lucci Electric Inc. | 14CC3FA525 | Apprenticeship Sponsor | Jun 30, 2027 |
| West Haven, CT | Luciano Plumbing & Heating | 7088BCCFA2 | Apprenticeship Sponsor | Jun 30, 2009 |
| Wallingford, CT | LUCIBELLO ELECTRIC CO INC | 2055A82547 | Major Contractor + 1 more | Jun 30, 2027 |
| Stamford, CT | Lucky Lawn Irrigation, LLC | C2B0891398 | Apprenticeship Sponsor | Jun 30, 2015 |
| Danbury, CT | Lucre Enterprises Inc. | B08F658950 | Apprenticeship Sponsor | Jun 30, 2010 |
| Tolland, CT | Luginbuhl Plumbing & Services | B6EE83EE69 | Apprenticeship Sponsor | Jun 30, 2027 |
| Willimantic, CT | Luke Poulin | 8EEB7F912A | Apprenticeship Sponsor | Jun 30, 2013 |
| New Haven, CT | LULAC HEAD START | 1153A5E927 | Child Care Center + 1 more | Mar 31, 2029 |
| Durham, CT | Luminous Environments, LLC | 8A911224D8 | Apprenticeship Sponsor | Jun 30, 2027 |
| Watertown, CT | Lupo Electric, LLC | CDB5518729 | Apprenticeship Sponsor | Jun 30, 2027 |
| Avon, CT | Lustre Salon | 4FEB03E4A7 | Apprenticeship Sponsor | — |
| Brookfield, CT | Lutrus Electric, LLC | 1DDEC5661F | Apprenticeship Sponsor | Jun 30, 2027 |
| Middletown, CT | Luxe Beauty Lounge | FD4947C7B8 | Apprenticeship Sponsor | Jun 30, 2027 |
| Woodbury, CT | LV Electric, LLC | 6817958DE2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Middletown, CT | Lyman Products Corporation | 4D10EEA55C | Apprenticeship Sponsor | Jun 30, 2027 |
| Newington, CT | Lynn Welding Co., Inc. | DC414F6F06 | Apprenticeship Sponsor | Jun 30, 2024 |
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.