Apprenticeship Sponsor — page 4 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 | Brushy Hill Plumbing, LLC | 53E66451FE | Apprenticeship Sponsor | Jun 30, 2018 |
| Bantam, CT | Bryant Glass & Shower Doors, LLC | CBAF8FB393 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Watertown, CT | BT Electrical Services, LLC | B11431A8F2 | Apprenticeship Sponsor | Jun 30, 2026 |
| West Haven, CT | btl barbershop llc | 070114F013 | Apprenticeship Sponsor | Jun 30, 2027 |
| Thomaston, CT | BTU Solutions, LLC | 7D04AAA59C | Apprenticeship Sponsor | Jun 30, 2020 |
| Griswold, CT | BTW PLUMBING HEATING AND COOLING, LLC | E7284D8323 | Apprenticeship Sponsor | Jun 30, 2025 |
| Guilford, CT | BUCHTA OIL SERVICE | 23357EDC1C | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Naugatuck, CT | Buck Electric, LLC | C447F3F51E | Apprenticeship Sponsor | Jun 30, 2027 |
| Newington, CT | Buckley Associates, Inc. | B90FDDDFCB | Apprenticeship Sponsor | Jun 30, 2021 |
| Middletown, CT | Bud's Plumbing & Heating, Inc. | C09B97DC51 | Apprenticeship Sponsor | Jun 30, 2018 |
| Shelton, CT | BUDDERFLY, INC. | E48E657B06 | Apprenticeship Sponsor | Jun 30, 2024 |
| Oxford, CT | BUDDY'S FUEL LLC | BCE9A6612F | Apprenticeship Sponsor | Jun 30, 2027 |
| East Haven, CT | Budget Oil Company, Inc. | 28109C83B3 | Apprenticeship Sponsor | Jun 30, 2009 |
| Deep River, CT | Budney & Sons Services, LLC | 7CB8658334 | Apprenticeship Sponsor | Jun 30, 2027 |
| Collinsville, CT | Building Environmental Systems, LLC | 699D27CD2A | Apprenticeship Sponsor | Jun 30, 2023 |
| Waterbury, CT | Bulletproof Systems LLC | D30AD33356 | Apprenticeship Sponsor | Jun 30, 2027 |
| East Haven, CT | Bullseye Refrigeration & A/C Inc. | 54F5DEEE42 | Apprenticeship Sponsor | Jun 30, 2027 |
| Holmes, NY | Burkstrom Plumbing & Heating | A843D9101E | Apprenticeship Sponsor | Jun 30, 2023 |
| Norwalk, CT | Burnham Plumbing & Heating | B47C36C66B | Apprenticeship Sponsor | Jun 30, 2007 |
| Stratford, CT | Burns Construction Company, Inc. | 3EA37E8340 | Apprenticeship Sponsor + 2 more | Jun 30, 2027 |
| Stratford, CT | BURNS CONSTRUCTION COMPANY, INC. (UNION) JATC 478 (UNION) | 6C68B75E92 | Apprenticeship Sponsor | Jun 30, 2027 |
| North Stonington, CT | Burnside Plumbing, Heating & A/C, LLC | 41C6E7CCF3 | Apprenticeship Sponsor | Jun 30, 2027 |
| Moodus, CT | Burr Electric, LLC | C5EB50C341 | Apprenticeship Sponsor | Jun 30, 2007 |
| Waterford, CT | Burr Plumbing & Heating Inc. | 50AF477247 | Apprenticeship Sponsor | Jun 30, 2014 |
| Rocky Hill, CT | Burris Logistics | 7ECB1949B8 | Apprenticeship Sponsor | Jun 30, 2019 |
| Union, CT | Bush Meadow Farm, LLC | 307D3A8C06 | Apprenticeship Sponsor | Jun 30, 2020 |
| Southbury, CT | Butkus Plumbing, LLP | 6FBD2483F0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stafford Springs, CT | BUTLER DIVERSIFIED SERVICES LLC | 08A9643DCF | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Waterford, CT | Buttermore Plumbing LLC | 96A3F97381 | Apprenticeship Sponsor | Jun 30, 2023 |
| Derby, CT | Butterworth Plumbing, LLC | D6D2C3B77F | Apprenticeship Sponsor | Jun 30, 2013 |
| New Milford, CT | Butts Bros. Excavation | C6DC123C3B | Apprenticeship Sponsor | Jun 30, 2024 |
| New Britian, CT | Buzz Electric, LLC | 9DEA0FA7C8 | Apprenticeship Sponsor | Jun 30, 2015 |
| Stamford, CT | Buzzeo Electric LLC | 1769E22696 | Apprenticeship Sponsor | Jun 30, 2008 |
| Wallingford, CT | BYK USA | 246DB8857B | Operator of Weighing & Measuring Devices + 1 more | Jul 31, 2027 |
| Harwinton, CT | Byrnes Electrical Service LLC | 231925BD24 | Apprenticeship Sponsor | Jun 30, 2007 |
| Moosup, CT | C & C Electrical Contractors, LLC | 9280659B03 | Apprenticeship Sponsor | Jun 30, 2027 |
| Southington, CT | C & C ELECTRICAL SERVICES LLC | C1DFA1475C | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| East Canaan, CT | C & C Plumbing and Heating, Inc. | A02B377E14 | Apprenticeship Sponsor | Jun 30, 2026 |
| Stamford, CT | C & C SERVICE, LLC | DD0CDF853A | Apprenticeship Sponsor | Jun 30, 2027 |
| Woodbury, CT | C & D CUSTOM ELECTRICAL, LLC | EB3F9C16D4 | Apprenticeship Sponsor | Jun 30, 2027 |
| Trumbull, CT | C & E Enterprises LLC | B891C6A3C6 | Apprenticeship Sponsor | Jun 30, 2008 |
| North Stonington, CT | C & G Electric | C1765A6F62 | Apprenticeship Sponsor | Jun 30, 2006 |
| West Suffield, CT | C & G Electric, Inc. | 84845B71D3 | Apprenticeship Sponsor | Jun 30, 2015 |
| Torrington, CT | C & G Heating & Air Conditioning Inc. | 5AFF66FACF | Apprenticeship Sponsor | Jun 30, 2027 |
| Waterbury, CT | C & H ELECTRIC INC | 905268F8CF | Major Contractor + 1 more | Jun 30, 2027 |
| Stratford, CT | C & J Electrical, LLC | A7FAAEAA66 | Apprenticeship Sponsor | Jun 30, 2026 |
| Ashford, CT | C & K Electrical LLC | 7F21FC37AF | Apprenticeship Sponsor | Jun 30, 2026 |
| Hamden, CT | C & M Crocco Heating & Air Conditioning Co. | F5AB550B71 | Apprenticeship Sponsor | Jun 30, 2015 |
| Lakeville, CT | C & M ELECTRIC | 18415EA420 | Apprenticeship Sponsor | Jun 30, 2027 |
| Rocky Hill, CT | C & M Telephone, LLC | AAB59CA3CE | Apprenticeship Sponsor | Jun 30, 2007 |
| Glastonbury, CT | C & N MECHANICAL, INC. | 23E56F72B7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Vernon, CT | C & T Electric Corporation | 5E54E0E9D7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bozrah, CT | C & T Electrical Contractors LLC | B9AA8A1484 | Apprenticeship Sponsor | Jun 30, 2005 |
| Torrington, CT | C H Nickerson & Company Inc. | 0B2CAB0BE6 | Demolition Contractor + 2 more | Sep 30, 2027 |
| Westport, CT | C Solar LLC | 2722BBC163 | Apprenticeship Sponsor | Jun 30, 2010 |
| Coventry, CT | C WARD ELECTRIC LLC | A647851FF0 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Terryville, CT | C-B Manufacturing and Tool Company, Inc. | 84A3EE6CCA | Apprenticeship Sponsor | Jun 30, 2027 |
| Naugatuck, CT | C-CO Technology, Inc. | 457CC299CA | Apprenticeship Sponsor | Jun 30, 2018 |
| Bloomfield, CT | C-TEC SOLAR LLC | 7722CB2F0C | Major Contractor + 2 more | Jun 30, 2027 |
| Watertown, CT | C-Tech Manufacturing Company, LLC | 6017E8F5C1 | Apprenticeship Sponsor | Jun 30, 2019 |
| Westbrook, CT | C. Brown & Son Electric | CA425D8A6B | Apprenticeship Sponsor | Jun 30, 2010 |
| Mohegan Lake, NY | C. Crescenzo Electrical Contractors | 885F4CC3C8 | Apprenticeship Sponsor | Jun 30, 2023 |
| Branford, CT | C.A. Trudeau Plumbing & Heating, LLC | 8394BEC3BA | Apprenticeship Sponsor | Jun 30, 2017 |
| Cheshire, CT | C.B.R.E. INC - CHESHIRE | 2AB32881D6 | Apprenticeship Sponsor | Jun 30, 2027 |
| Hartford, CT | C.B.R.E. INC. - HARTFORD | C989F9BBCE | Apprenticeship Sponsor | Jun 30, 2026 |
| Southbury, CT | C.B.R.E. INC. - SOUTHBURY | AB69882F2B | Apprenticeship Sponsor | Jun 30, 2024 |
| West Haven, CT | C.E.S. Inc. "Current Electrical Solutions" | EC40F432C5 | Apprenticeship Sponsor | Jun 30, 2010 |
| Watertown, CT | C.G.L. Inc. dba Anco Tool | A9D44F770A | Apprenticeship Sponsor | — |
| Willimantic, CT | C.J. Electrical Services, LLC | 24CE878B7E | Apprenticeship Sponsor | Jun 30, 2009 |
| New Haven, CT | C.J. Fucci Construction Inc. Operatin Engineers of Ct JATC 478 | BFD6DAC596 | Apprenticeship Sponsor | Jun 30, 2024 |
| Bethel, CT | C.J.'s Plumbing Services, LLC | 6F3B33C8AC | Apprenticeship Sponsor | Jun 30, 2027 |
| Coventry, CT | C.N. Electric Company | 3B59FD57EA | Apprenticeship Sponsor | Jun 30, 2022 |
| Durham, CT | C.O. Electric | 66B3A4DEEB | Apprenticeship Sponsor | Jun 30, 2007 |
| Danbury, CT | C.P. & Sons Electric, LLC | 82ECA4B103 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ivoryton, CT | C.P. Burdick & Son Inc. | E5AEAB0396 | Apprenticeship Sponsor | Jun 30, 2019 |
| Grosvenordale, CT | C.R. Trudeau & Sons Plumbing & Heating | 82F0339D23 | Apprenticeship Sponsor | Jun 30, 2027 |
| Wolcott, CT | C.R.I.S. LLC | FB7FB423EB | Apprenticeship Sponsor | Jun 30, 2008 |
| Middletown, CT | C.S. Magnano Plumbing & Heating Contr., LLC | 69196DF52E | Apprenticeship Sponsor | Jun 30, 2023 |
| Stratford, CT | C.T. Electrical Construction Co. Inc. | B3CE8015E6 | Apprenticeship Sponsor | Jun 30, 2005 |
| West Haven, CT | C.T.S. HEATING & COOLING, INC. | 6B08909C81 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | C.V. Longo Mechanical Service Inc. | FADE968D1C | Apprenticeship Sponsor | Jun 30, 2027 |
| North Windham, CT | C.W. Knight Oil & Heating, LLC | 883DF949AC | Apprenticeship Sponsor | Jun 30, 2025 |
| Chaplin, CT | C.W. Knight Oil & Heating, LLC | 83093F8F7F | Apprenticeship Sponsor | Jun 30, 2013 |
| Norwalk, CT | C.W. Pond Contractors, Inc. | BC20F81363 | Apprenticeship Sponsor | Jun 30, 2011 |
| Wolcott, CT | C/N Electrical Construction Co. | A8D7F964F1 | Apprenticeship Sponsor | Jun 30, 2006 |
| Meriden, CT | Cable Management, LLC | 7FCDE7CAEE | Apprenticeship Sponsor | Jun 30, 2023 |
| North Haven, CT | Cable Systems North Haven, Inc. | FD61EA74EF | Apprenticeship Sponsor | Jun 30, 2011 |
| Norwalk, CT | Cabling Technologies, LLC | 7F1021684D | Apprenticeship Sponsor | Jun 30, 2012 |
| Colchester, CT | Cady Oil LLC | 540B0B2984 | Apprenticeship Sponsor | Jun 30, 2008 |
| Hamden, CT | CAG Electrical Co. Inc. | 240BE22372 | Apprenticeship Sponsor | Jun 30, 2027 |
| North Haven, CT | Cahill Electrical Services, LLC | AF07FB45F5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Hamden, CT | Cain Electrical, LLC | 2B11482FB6 | Apprenticeship Sponsor | Jun 30, 2006 |
| Wallingford, CT | Caires Plumbing LLC | B45156CF1F | Apprenticeship Sponsor | Jun 30, 2008 |
| Torrington, CT | Cal Electrical, LLC | 954C6A0506 | Apprenticeship Sponsor | Jun 30, 2025 |
| East Haven, CT | Calabrese Electric, LLC | DBFBB6A6FF | Apprenticeship Sponsor | Jun 30, 2015 |
| Waterford, CT | CALKINS ELECTRIC | C27C045C35 | Apprenticeship Sponsor | Jun 30, 2027 |
| Farmington, CT | Call The Bee H, C, P & Electrical Formerly Busy Bee | C9FA1F7C81 | Apprenticeship Sponsor | Jun 30, 2027 |
| Trumbull, CT | Call the Plumber | F2B15504FE | Apprenticeship Sponsor | Jun 30, 2027 |
| Enfield, CT | Callahan's Plumbing & Heating | 303BF30DDC | Apprenticeship Sponsor | Jun 30, 2024 |
| Cheshire, CT | Calo Electric, LLC | 1F589D7FAF | Apprenticeship Sponsor | Jun 30, 2021 |
| Derby, CT | Calvert Safe & Lock | 1D5883D31F | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Milford, CT | CAM Manufacturing Company, LLC | 562F9AC2AB | Apprenticeship Sponsor | — |
| Prospect, CT | Cambridge Electric, LLC | 3FF836AC35 | Apprenticeship Sponsor | Jun 30, 2027 |
| Berlin, CT | CAMBRIDGE SPECIALTY COMPANY, INC. | B06C57B20B | Apprenticeship Sponsor | Jun 30, 2027 |
| Portland, CT | CAMERON PLUMBING & HEATING MECHANICAL CONTRACTORS LLC | C9B736E23F | Apprenticeship Sponsor | Jun 30, 2026 |
| Newington, CT | Campbell Cooling, LLC | BCD42D6E8B | Apprenticeship Sponsor | Jun 30, 2027 |
| Moosup, CT | Campbell Plumbing and Heating | 07FAE3EF4C | Apprenticeship Sponsor | Jun 30, 2027 |
| Windsor Locks, CT | Campion Electric, LLC | 5BA288AF4E | Apprenticeship Sponsor | Jun 30, 2006 |
| North Branford, CT | Camputaro & Son Excavating Construction & Development Company | B445245E05 | Apprenticeship Sponsor | Jun 30, 2012 |
| Stamford, CT | CAMSAN, INC. | A0E9A8D968 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Canaan, CT | Canaan Electrical Contracting, LLC | CCA71A5445 | Apprenticeship Sponsor | Jun 30, 2006 |
| Shelton, CT | Candel Electrical Contracting LLC | D2AEF49163 | Apprenticeship Sponsor | Jun 30, 2016 |
| Hawthorne, NY | Candela Systems Corporation | 46F6B10A8A | Apprenticeship Sponsor | Jun 30, 2023 |
| Milford, CT | Candido Electric LLC | 485CC6641A | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | Candito Plumbing and HVAC, LLC | 18F9EB0BB9 | Apprenticeship Sponsor | Jun 30, 2027 |
| Oxford, CT | Candlelight Electric Inc. | 467DB2E8D7 | Apprenticeship Sponsor | Jun 30, 2025 |
| New Milford, CT | Candlewood Valley Heating & A/C LLC | D4AE0FFC9D | Apprenticeship Sponsor | Jun 30, 2027 |
| Bethlehem, CT | Canfield Electric | DC82AC1D4E | Apprenticeship Sponsor | Jun 30, 2018 |
| Canterbury, CT | Canterbury Communications LLC | 7EF00236EC | Apprenticeship Sponsor | Jun 30, 2008 |
| Wethersfield, CT | CANTIN PLUMBING CO., INC. | 2AA362A3C0 | Apprenticeship Sponsor | Jun 30, 2025 |
| Hebron, CT | Capital Burner & Boiler Repair, Inc. | 52240E269E | Apprenticeship Sponsor | Jun 30, 2008 |
| Bloomfield, CT | Capital City Electrical Services, LLC | 1F3E51B26E | Apprenticeship Sponsor | Jun 30, 2021 |
| Wallingford, CT | Capital Fire Services & Electric, LLC | 193AD93159 | Apprenticeship Sponsor | Jun 30, 2024 |
| Newington, CT | Capital Region Plumbing Contractors, LLC | E1DB4D32D5 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Britain, CT | Capitol Electrical Construction, Inc. | DEDE1F6C84 | Apprenticeship Sponsor | Jun 30, 2004 |
| West Hartford, CT | CAPITOL GLASS CO., INC. | E31FB46996 | Apprenticeship Sponsor | Jun 30, 2027 |
| Orange, CT | Capitol Plumbing & Heating, Inc. | D59B9E0CCF | Apprenticeship Sponsor | Jun 30, 2006 |
| Milford, CT | Capitol Sheet Metal Contractors, LLC | 69B3ED597B | Apprenticeship Sponsor | Jun 30, 2014 |
| Trumbull, CT | Cappy's Plumbing LLC | 17D9130E20 | Apprenticeship Sponsor | Jun 30, 2010 |
| Portsmouth, NH | Capstone Mechanical, LLC | DAE2DE84E3 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | CaptiveAire Systems, Inc. | 6A37291799 | Apprenticeship Sponsor | Jun 30, 2022 |
| Brooklyn, CT | Cardinal Plumbing & Heating LLC | 9ACD16DDA8 | Apprenticeship Sponsor | Jun 30, 2014 |
| Waterbury, CT | Career Resources, Inc. | 12AED64F7B | Apprenticeship Sponsor | Jun 30, 2022 |
| Cromwell, CT | Carey Manufacturing Co., Inc. | 80223E41BD | Apprenticeship Sponsor | Jun 30, 2022 |
| Clinton, CT | Cariati Mechanical | F843886BDC | Apprenticeship Sponsor | Jun 30, 2026 |
| Madison, CT | Carl Jordan Plumbing & Heating, LLC | 77BB19B71B | Apprenticeship Sponsor | Jun 30, 2027 |
| New Milford, CT | Carl Profita & Sons Plumbing | A828BB9678 | Apprenticeship Sponsor | — |
| Milford, CT | Carl-Tech Enterprises | 2F56F3E257 | Apprenticeship Sponsor | Jun 30, 2013 |
| Hartford, CT | Carlo Electric Company | FB3DB8E2D1 | Apprenticeship Sponsor | Jun 30, 2011 |
| Somers, CT | CARLSON & ROBBIATI ELECTRIC LLC | 8C693BA5EA | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Torrington, CT | CARLSON HEATING AIR & HOT WATER INC. | 604DD80EAD | Apprenticeship Sponsor | Jun 30, 2026 |
| Sheffield, MA | Carlson Heating and Air Conditioning, Inc. | 7E9D53548F | Apprenticeship Sponsor | Jun 30, 2025 |
| Danbury, CT | Carmine's Plumbing Heating & Air Conditioning | 049FFE83C7 | Apprenticeship Sponsor | Jun 30, 2026 |
| Pawcatuck, CT | Carnot Heating | A03419B987 | Apprenticeship Sponsor | Jun 30, 2022 |
| Putnam, CT | Carolina Precision Technologies, LLC | CB60089B0F | Apprenticeship Sponsor | Jun 30, 2023 |
| Oakville, CT | Caron Electric | 9C39088E90 | Apprenticeship Sponsor | Jun 30, 2013 |
| Rocky Hill, CT | Carone Electric | 56D60BB6D3 | Apprenticeship Sponsor | Jun 30, 2027 |
| Waterbury, CT | Carpin Manufacturing, Inc. | 7015544914 | Apprenticeship Sponsor | Jun 30, 2027 |
| Watertown, CT | CARRAGAN HEATING & AIR CONDITIONING LLC | AAF0ABF2D9 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Stratford, CT | Carrano Electric | 9F39F7AD3E | Apprenticeship Sponsor | Jun 30, 2010 |
| Middlebury, CT | Carreira Company Inc. | F4F82D0F19 | Apprenticeship Sponsor | Jun 30, 2020 |
| Monroe, CT | Carriage Light Electric, LLC | B083A6DDD8 | Apprenticeship Sponsor | Jun 30, 2006 |
| Middletown, CT | Carrier Air Conditioning | 4B2FDC42FD | Apprenticeship Sponsor | Jun 30, 2013 |
| Canton, MA | Carrier Commercial Service/Pl & Pf local #51 | 72B018B80D | Apprenticeship Sponsor | Jun 30, 2008 |
| Plainville, CT | Carrier Group, Inc. | 0EBF1D1BD1 | Apprenticeship Sponsor + 2 more | Jun 30, 2027 |
| Cheshire, CT | Carten-Fujikin, Inc. | DB49D075E0 | Apprenticeship Sponsor | Jun 30, 2019 |
| Brooklyn, CT | Cartier Electric, LLC | 0E19DF72C9 | Apprenticeship Sponsor | Jun 30, 2020 |
| New Britain, CT | Caruso Electric Co. | A2572F3A5E | Apprenticeship Sponsor | Jun 30, 2027 |
| Canton, CT | Cas-Kel Manufacturing Co., Inc. | 1ACFB39686 | Apprenticeship Sponsor | Jun 30, 2013 |
| Guilford, CT | CASAGRANDE BROTHERS HEATING & AC | E382ACB189 | Apprenticeship Sponsor | Jun 30, 2027 |
| Oakdale, CT | CASCIO PLUMBING LLC | 2DD6FC87D3 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Uncasville, CT | Case Electric | A7B600E94F | Apprenticeship Sponsor | Jun 30, 2018 |
| Bridgeport, CT | Casey Electric LLC | D6EE3AD277 | Apprenticeship Sponsor | Jun 30, 2027 |
| Plainville, CT | Casey Electrical Services, LLC | 2A00C310E4 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ridgefield, CT | CASEY FUEL | 53C7A17D45 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Milldale, CT | Casner Electric, LLC | 15EB6466ED | Apprenticeship Sponsor | Jun 30, 2027 |
| Cobalt, CT | Caso's HVAC, LLC | D4A75C74FE | Apprenticeship Sponsor | Jun 30, 2026 |
| Woodbury, CT | Cassanola Electric, LLC | 1C1A18D7C7 | Apprenticeship Sponsor | Jun 30, 2023 |
| Hamden, CT | Cassella Electric, LLC | 675A36B6E2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ansonia, CT | CASTLE BEVERAGES INC | A1CD6A3457 | Non-Alcoholic Beverage & Water Bottlers + 1 more | Jun 30, 2019 |
| Bethel, CT | Castle Electric | D3C784ADC6 | Apprenticeship Sponsor | Jun 30, 2022 |
| Meriden, CT | CASTLE HEATING AND A/C | E11F40CE4B | Apprenticeship Sponsor | Jun 30, 2027 |
| Meriden, CT | Castle View Enterprises, LLC | 4F487529AF | Apprenticeship Sponsor | Jun 30, 2027 |
| Canterbury, CT | CASWELL & SONS CONTRACTING, LLC | 7B3DE684B8 | Apprenticeship Sponsor | Jun 30, 2027 |
| Moodus, CT | Cavanaugh Plumbing & Heating LLC | 7A9CB2C3D0 | Apprenticeship Sponsor | Jun 30, 2021 |
| Wallingford, CT | CAVCOMM, LLC | FDE75C7556 | Apprenticeship Sponsor | Jun 30, 2016 |
| Stratford, CT | Cavoto Plumbing & Heating, LLC. | 607CE99D75 | Apprenticeship Sponsor | Jun 30, 2027 |
| Old Saybrook, CT | Cawiamca, LLC | 514E0C2A09 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stonington, CT | Cawley Plumbing & Heating | 5BD02398FC | Apprenticeship Sponsor | Jun 30, 2022 |
| North Canaan, CT | CB Mechanical Services, LLC | 09F43F664F | Apprenticeship Sponsor | Jun 30, 2026 |
| Ansonia, CT | CBS CONTRACTORS INC | DD0069AF3A | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| East Granby, CT | CBS Manufacturing Company | 20DFCF6C2C | Apprenticeship Sponsor | Jun 30, 2022 |
| North Haven, CT | CBS Outdoor INC. | 44F1ADC60B | Apprenticeship Sponsor | Jun 30, 2015 |
| Shelton, CT | CCL Label | 5C069FBF2A | Apprenticeship Sponsor | Jun 30, 2007 |
| New Britain, CT | CE Electrical Contractors, LLC | E6203D55DB | Apprenticeship Sponsor | Jun 30, 2027 |
| New Milford, CT | Cebe Electric, LLC | 0E7C3EDDE7 | Apprenticeship Sponsor | Jun 30, 2020 |
| Stratford, CT | Cedar Point Mechanical | 215059FE7C | Apprenticeship Sponsor | Jun 30, 2027 |
| Pawcatuck, CT | Ceil Plumbing & Heating, Inc. | A5DA21F184 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bridgeport, CT | Celco Heating & Air Conditioning | 5252599FDC | Apprenticeship Sponsor | Jun 30, 2027 |
| Mansfield, CT | Central Air | 212E1C7459 | Apprenticeship Sponsor | Jun 30, 2008 |
| Brookfield, CT | Central Air LLC | 335CC15873 | Apprenticeship Sponsor | Jun 30, 2027 |
| Thomaston, CT | Central Connecticut Cable Co., Inc. | A23338D1ED | Apprenticeship Sponsor | Jun 30, 2027 |
| New Haven, CT | CENTRAL CONNECTICUT COAST YMCA INC. | 604F108AD4 | Apprenticeship Sponsor | Jun 30, 2006 |
| Meriden, CT | Central Connecticut Fire Protection Inc. | 91444973E8 | Apprenticeship Sponsor | Jun 30, 2023 |
| Rocky Hill, CT | Central Connecticut Pipefitters LLC | 18D04D8914 | Apprenticeship Sponsor | Jun 30, 2015 |
| Stratford, CT | CENTRAL CT COAST YMCA INC | 11642E9649 | Apprenticeship Sponsor | Jun 30, 2027 |
| Cheshire, CT | Central Electric & Generator Inc. | 8A004D4F1E | Apprenticeship Sponsor | Jun 30, 2022 |
| Brookfield, CT | Central Electric Service Corp. | AF16225522 | Apprenticeship Sponsor | Jun 30, 2009 |
| Meriden, CT | Central Electric, LLC | 8B477CF346 | Apprenticeship Sponsor | Jun 30, 2021 |
| Cromwell, CT | CENTRAL MECHANICAL SERVICES INC | 21F12D5306 | Major Contractor + 1 more | Jun 30, 2027 |
| Westport, CT | Central Sheet Metal Inc. | 2419077AD0 | Apprenticeship Sponsor | Jun 30, 2011 |
| Higganum, CT | Central Systems, Inc. | 6D5A2980BD | Apprenticeship Sponsor | Jun 30, 2009 |
| Norwalk, CT | Century Leasing | 0C2BA2F7E3 | Apprenticeship Sponsor | Jun 30, 2008 |
| Bristol, CT | Century Spring Manufacturing Co., Inc. | 5C209D99E2 | Apprenticeship Sponsor | Jun 30, 2020 |
| Dayville, CT | Cerreto Associates, LLC | 8D1819D27B | Apprenticeship Sponsor | Jun 30, 2026 |
| Pomfret Center, CT | Certified Electrical Services LLC | 4737230ED3 | Apprenticeship Sponsor | Jun 30, 2013 |
| Waterbury, CT | CF Electrical Service, LLC | 8163783D40 | Apprenticeship Sponsor | Jun 30, 2026 |
| West Hartford, CT | CF Plumbing, LLC | 887391F063 | Apprenticeship Sponsor | Jun 30, 2027 |
| Hamden, CT | CFP, Inc. | 4F7E29D3FA | Apprenticeship Sponsor | Jun 30, 2025 |
| Taftville, CT | Chabot Electric LLC | 2D7186D40D | Apprenticeship Sponsor | Jun 30, 2019 |
| Stratford, CT | Chaffee Management, LLC | AC3EECAE9D | Apprenticeship Sponsor | Jun 30, 2027 |
| West Haven, CT | Chagas Electric Co., Inc. | 771E881EAC | Apprenticeship Sponsor | Jun 30, 2024 |
| Bridgeport, CT | Chagnon Electrical Services Group, LLC | 5BCE99D62F | Apprenticeship Sponsor | Jun 30, 2015 |
| Columbia, CT | Chamberlin Plumbing & Heating | C4978CB7AB | Apprenticeship Sponsor | Jun 30, 2019 |
| Stratford, CT | CHAMPION ELECTRIC | 6251EC3927 | Apprenticeship Sponsor | Jun 30, 2027 |
| Norwalk, CT | Chandler Security Systems Inc. | 79514670CF | Apprenticeship Sponsor | Jun 30, 2010 |
| Woodstock, CT | CHAPUT ELECTRIC LLC | A620E68AA9 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Shelton, CT | Charles Merdinger Plumbing & Heating, LLC | 77F71D4DEE | Apprenticeship Sponsor | Jun 30, 2022 |
| Wallingford, CT | Charles P. Flynn Plumbing & Heating, LLC | EDA8153866 | Apprenticeship Sponsor | Jun 30, 2024 |
| East Haven, CT | Charles Wright Plumbing | B43BD92895 | Apprenticeship Sponsor | Jun 30, 2027 |
| Lebanon, CT | CharMac Electric, LLC | 15C07577A9 | Apprenticeship Sponsor | Jun 30, 2021 |
| Wilton, CT | Charney & Sons Electrical Contractors | 5DEA70069C | Apprenticeship Sponsor | Jun 30, 2014 |
| Manchester, CT | Charter Oak Mechanical Services, LLC | C6382E8A76 | Apprenticeship Sponsor | Jun 30, 2027 |
| Windsor Locks, CT | Charter Oak Oil DBA - Aiello Home Services | 1B495DF2CE | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Woodbury, CT | Chas. Scherer & Sons | 377E33E815 | Apprenticeship Sponsor | Jun 30, 2007 |
| East Hartford, CT | Chase Glass Company, Inc. | 3D0BFBC12B | Apprenticeship Sponsor | Jun 30, 2027 |
| Southington, CT | Chase Mechanical Contractors, Inc. | 9BB976603E | Apprenticeship Sponsor | Jun 30, 2024 |
| Southington, CT | CHASE MECHANICAL, LLC | 3F8EA3FED4 | Apprenticeship Sponsor | Jun 30, 2027 |
| Hamden, CT | Checkmate Creations, LLC | 2E7EED8E99 | Apprenticeship Sponsor | Jun 30, 2017 |
| Stamford, CT | CHELSEA PIERS CONNECTICUT LLC | 661D144936 | Health Club + 1 more | Sep 30, 2026 |
| West Hartford, CT | CHENAIL, LLC | 4A8DCC21E5 | Pesticide Application Business Registration + 2 more | Aug 31, 2027 |
| Westerly, RI | Cherenzia Excavation, Inc. | 3429834C72 | Apprenticeship Sponsor | Jun 30, 2027 |
| Waterbury, CT | Chernin HVAC & Refrigeration, LLC | 4F4072C05C | Apprenticeship Sponsor | Jun 30, 2026 |
| Hamden, CT | Cheshire Barber Shop | 22281B1057 | Apprenticeship Sponsor | Jun 30, 2026 |
| Cheshire, CT | Cheshire Glass Co. Inc. | 73DB97C1A0 | Apprenticeship Sponsor | Jun 30, 2009 |
| Trumbull, CT | Chester Electric & Sons Inc. | 99BA312DA2 | Apprenticeship Sponsor | Jun 30, 2014 |
| Chester, CT | Chestnut Acquisitions, LLC | F2FDC1A481 | Apprenticeship Sponsor | Jun 30, 2019 |
| Wilton, CT | Chestnut Electric Corp. | 7EC058365D | Apprenticeship Sponsor | Jun 30, 2027 |
| Clinton, CT | Chet's Electric, LLC | 3C7ECDA91E | Apprenticeship Sponsor | Jun 30, 2026 |
| Cos Cob, CT | Chiappetta Electrical Contractors, Inc. | 9862C4762B | Apprenticeship Sponsor | Jun 30, 2007 |
| Bristol, CT | Chiarillo's, LLC | A212638707 | Apprenticeship Sponsor | Jun 30, 2025 |
| Milford, CT | Chickos Energy Services LLC | BB36958119 | Apprenticeship Sponsor | Jun 30, 2022 |
| Milford, CT | Chickos Heating, LLC | CDB312A14F | Apprenticeship Sponsor | Jun 30, 2011 |
| Milford, CT | Chickos Oil Co., Inc. | A0AF54F09C | Apprenticeship Sponsor | Jun 30, 2004 |
| Bridgeport, CT | Choice Security Systems, LLC | 2457157AC9 | Apprenticeship Sponsor | Jun 30, 2014 |
| Shelton, CT | Chop Shop 132 | AC11CFA92E | Apprenticeship Sponsor | Jun 30, 2027 |
| Glastonbury, CT | Choppe Shoppe Salon & Barber | DE605878D4 | Apprenticeship Sponsor | Jun 30, 2019 |
| Pomfret Center, CT | Chouinard Mechanical, LLC | 4CC8F7AEA3 | Apprenticeship Sponsor | Jun 30, 2027 |
| Columbia, CT | Chowanec Well Drilling, LLC | FB59D9F073 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | Chris Carlo Electrical Contractors, Inc. | 3A6F2A4EAF | Apprenticeship Sponsor | Jun 30, 2006 |
| Southington, CT | Chris Mechanical LLC | 1353BE987F | Apprenticeship Sponsor | Jun 30, 2018 |
| Orange, CT | Chris Montanaro Electric LLC | 9978189437 | Apprenticeship Sponsor | Jun 30, 2026 |
| Bristol, CT | Chris' Refrigeration Heating & A/C, Inc. | 6FE9800B6A | Apprenticeship Sponsor | Jun 30, 2022 |
| Marlborough, CT | Christmas Electric Inc. | 12E6912394 | Apprenticeship Sponsor | Jun 30, 2017 |
| Orange, CT | Chubb Fire & Security | A561FFE6A2 | Apprenticeship Sponsor | Jun 30, 2013 |
| Seymour, CT | Chucta Company | 246666CE66 | Apprenticeship Sponsor | Jun 30, 2027 |
| Berlin, CT | Ciaffaglione Plumbing, LLC | 41E349DBF2 | Apprenticeship Sponsor | Jun 30, 2025 |
| Pittsfield, ME | CIANBRO CORPORATION | D687343A38 | Major Contractor + 1 more | Jun 30, 2027 |
| Wallingford, CT | Cichowski Electric | 83AABA98E4 | Apprenticeship Sponsor | Jun 30, 2007 |
| Wallingford, CT | CIMCO Refrigeration Inc. | 582D022995 | Apprenticeship Sponsor | Jun 30, 2015 |
| Ansonia, CT | Cindy's Hair Company | 88220C09DF | Apprenticeship Sponsor | — |
| Plainville, CT | CINTAS CORP. #2 DBA CINTAS FIRE PROTECTION | 835FD9A594 | Apprenticeship Sponsor | Jun 30, 2027 |
| Fairfield, CT | Cipri Plumbing & Heating LLC | 32B7B97AFC | Apprenticeship Sponsor | Jun 30, 2023 |
| Seymour, CT | Circuit Breaker Sales NE | 56AEE945AD | Apprenticeship Sponsor | Jun 30, 2019 |
| Warren, CT | Circuit Wizard LLC | 3D05DD3DB1 | Apprenticeship Sponsor | Jun 30, 2011 |
| West Haven, CT | Cisco Heating and Cooling Pros, LLC | 3B7AAAE530 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ellington, CT | City BES, LLC | 5C05D9D92E | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | City Electric Inc. | 74D3071F2C | Apprenticeship Sponsor | Jun 30, 2009 |
| Hartford, CT | City Electrical Enterprises, LLC | 5828E83AD3 | Apprenticeship Sponsor | Jun 30, 2009 |
| Southington, CT | CITY FACILITIES MANAGEMENT | 95A64F3E29 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | City of Bristol - Water Department | 826AD6E0D9 | Apprenticeship Sponsor | Jun 30, 2021 |
| Danbury, CT | City of Danbury Fire Department | 30DBEC1B86 | Apprenticeship Sponsor | Jun 30, 2010 |
| New Haven, CT | City of New Haven Fire Department | EFEAE9438C | Apprenticeship Sponsor | Jun 30, 2019 |
| Norwalk, CT | City of Norwalk Parks and Recretation | FCBD184EF4 | Apprenticeship Sponsor | Jun 30, 2027 |
| Shelton, CT | City of Shelton | B5C4FE2271 | Apprenticeship Sponsor | Jun 30, 2023 |
| Stamford, CT | City of Stamford | A9C129386C | Apprenticeship Sponsor | Jun 30, 2020 |
| Avon, CT | Cizek Electric Inc. | 5163C5F1CD | Apprenticeship Sponsor | Jun 30, 2009 |
| Willimantic, CT | CJ Electrical Services, LLC | F387E009D8 | Apprenticeship Sponsor | — |
| North Granby, CT | CJ Plumbing & Heating | 55AF91659F | Apprenticeship Sponsor | Jun 30, 2023 |
| Hamden, CT | CJC Electric, LLC | CBA4AA7190 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | CK Electric, LLC | C5D88A8416 | Apprenticeship Sponsor | — |
| Woodbridge, CT | CKG ASSOCIATES LLC SERVPRO OF MILFORD-ORANGE-STRATFORD | FADFADBC58 | Asbestos Contractor + 2 more | Sep 30, 2027 |
| Westbrook, CT | CKS Electrical Construction, LLC | CB91018EF6 | Apprenticeship Sponsor | Jun 30, 2025 |
| Cheshire, CT | Clark Electrical Services, LLC | 3CCF9A28B1 | Apprenticeship Sponsor | Jun 30, 2026 |
| Middletown, CT | Clark's Heating | D6FC199B6F | Apprenticeship Sponsor | Jun 30, 2023 |
| Bristol, CT | Classic Blue Barbershop | 5348DD3D2A | Apprenticeship Sponsor | Jun 30, 2023 |
| Torrington, CT | Classic Glass Ltd. | F27BC896D7 | Apprenticeship Sponsor | Jun 30, 2010 |
| Waterbury, CT | Classic Tool & Manufacturing, Inc. | E1436F0C7A | Apprenticeship Sponsor | Jun 30, 2018 |
| Simsbury, CT | Claywell Electric Co., Inc. | D92AD82023 | Apprenticeship Sponsor | Jun 30, 2004 |
| Broad Brook, CT | CLEAN CLIMATE HVAC INC. | 97B134E0FA | Apprenticeship Sponsor | Jun 30, 2026 |
| Danbury, CT | Clean Water Man, Inc. | 364CD6E9CE | Apprenticeship Sponsor | Jun 30, 2022 |
| Southington, CT | Clear Automation LLC | 47EA66A23D | Apprenticeship Sponsor | Jun 30, 2020 |
| Portland, CT | Clear Blue Water Systems | A3888690A8 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Bolton, CT | Clear Electrical Solutions | 34C420AEA1 | Apprenticeship Sponsor | Jun 30, 2017 |
| East Hartford, CT | Clear River Fuel | B97537B914 | Apprenticeship Sponsor | Jun 30, 2018 |
| Ellington, CT | Clemson Sheet Metal, LLC | 4411C2E851 | Apprenticeship Sponsor | Jun 30, 2027 |
| Somers, CT | CLG Electric, LLC | 1007C94D76 | Apprenticeship Sponsor | Jun 30, 2027 |
| Watertown, CT | Click Bond, Inc. | 916ACEE96E | Apprenticeship Sponsor | Jun 30, 2027 |
| Danielson, CT | Cliff's Plumbing | 3BB2382C2D | Apprenticeship Sponsor | Jun 30, 2021 |
| Brooklyn, CT | Clifford B. Green & Sons, Inc. | 733EF040BE | Apprenticeship Sponsor | Jun 30, 2016 |
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.