Apprenticeship Sponsor — page 9 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 |
|---|---|---|---|---|
| Bloomfield, CT | H.C. Electric, LLC | 32548E73D0 | Apprenticeship Sponsor | Jun 30, 2011 |
| Manchester, CT | H.H.S. MECHANICAL CONTRACTORS, INC. | 5C7ED133E2 | Apprenticeship Sponsor | Jun 30, 2025 |
| Southbury, CT | H.I. Stone & Son, Inc. | 0F1AD8BB50 | Apprenticeship Sponsor | Jun 30, 2025 |
| Mystic, CT | H.J. Smith Inc. | 430A7DF7B2 | Apprenticeship Sponsor | Jun 30, 2018 |
| Watertown, CT | H20 WorX, LLC | 428C87B810 | Apprenticeship Sponsor | Jun 30, 2014 |
| East Hampton, CT | H2O Equipment Company, Inc. | 05BCF592DF | Apprenticeship Sponsor | Jun 30, 2027 |
| Wilton, CT | Haase Electrical Services, LLC | 3CE3D8D0E1 | Apprenticeship Sponsor | Jun 30, 2008 |
| Glastonbury, CT | HABCO Industries, LLC | 63CFF235D1 | Apprenticeship Sponsor | Jun 30, 2020 |
| Bloomfield, CT | Hadden Electrical Services, LLC | 8EBD26F364 | Apprenticeship Sponsor | Jun 30, 2019 |
| Bloomfield, CT | Hadden Home Services, Inc. | 0647648196 | Apprenticeship Sponsor | Jun 30, 2023 |
| Falls Village, CT | Hafner Mechanical, LLC | 409F21AFA7 | Apprenticeship Sponsor | Jun 30, 2011 |
| West Haven, CT | HAFSCO, INC. | 4ED9EE214A | Apprenticeship Sponsor | Jun 30, 2026 |
| Essex, CT | HAGAN Mechanical Services | 07E9703392 | Apprenticeship Sponsor | Jun 30, 2026 |
| Waterbury, CT | Hair By Jennifer Marie | CF8F8EA2A9 | Apprenticeship Sponsor | — |
| Bethel, CT | Hair Hooligans | F7C0596913 | Apprenticeship Sponsor | Jun 30, 2026 |
| New Haven, CT | Hair Loss Salon and Beauty Supply, LLC | BF68E4823C | Apprenticeship Sponsor | Jun 30, 2026 |
| East Hartford, CT | Hair Obsessions LLC | B24818206A | Apprenticeship Sponsor | — |
| Rocky Hill, CT | Hamann Electric, LLC | 72807CE7B6 | Apprenticeship Sponsor | Jun 30, 2008 |
| Hamden, CT | HAMDEN PARTITIONS AND ACCOUSTICAL LLC | 93F96A745D | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Holyoke, MA | Hampshire Fire Protection | 8631E7500E | Apprenticeship Sponsor | Jun 30, 2025 |
| Tolland, CT | Hanco Plumbing & Heating | 01E92D211A | Apprenticeship Sponsor | Jun 30, 2023 |
| West Haven, CT | Hands&Hustle Barbershop | C524AE07F2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Woodbury, CT | Hanlon's Plumbing Company, LLC | DE52BA4D41 | Apprenticeship Sponsor | Jun 30, 2018 |
| Clinton, CT | HANNA ELECTRIC INC. | F13BA6A95A | Apprenticeship Sponsor | Jun 30, 2027 |
| New Milford, CT | Hantsch Electric, Inc. | E9BAE0F31A | Apprenticeship Sponsor | Jun 30, 2027 |
| Cheshire, CT | Hanwha Aerospace USA | BD925E1463 | Apprenticeship Sponsor | Jun 30, 2027 |
| East Windsor, CT | Hanwha Aerospace USA- EBTEC | 4862E7B9CE | Apprenticeship Sponsor | Jun 30, 2023 |
| Rockville, CT | Hany Brothers Inc. | 14F121A9B1 | Apprenticeship Sponsor | Jun 30, 2007 |
| Ellington, CT | Hany Mechanical Services | 09FDDAF1D0 | Apprenticeship Sponsor | Jun 30, 2024 |
| Rockville, CT | Hany Plumbing & Heating Inc. | 66883B8FFF | Apprenticeship Sponsor | Jun 30, 2008 |
| Hartford, CT | Happy Little Faces LLC | 2496D45C8B | Apprenticeship Sponsor | Jun 30, 2027 |
| West Hartford, CT | HAR CONN CHROME COMPANY (THE) | EF50744771 | Vending Machine Operator + 1 more | Jun 30, 2027 |
| Stamford, CT | Harbor Electric LLC | 9BCFFBA527 | Apprenticeship Sponsor | Jun 30, 2008 |
| Colchester, CT | Harbor Electrical Contractors, Inc. | C52E0CB76F | Apprenticeship Sponsor | Jun 30, 2018 |
| Milford, CT | Harborview Electric | C407A4C2E9 | Apprenticeship Sponsor | Jun 30, 2027 |
| Hartford, CT | HARDY ENTERPRISE, LLC | B607F26A54 | Apprenticeship Sponsor | Jun 30, 2027 |
| Windsor, CT | HARP HOME SERVICES, LLC | ED98B69B16 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Falls Village, CT | Harper Electric | 66CBBA7AE6 | Apprenticeship Sponsor | Jun 30, 2027 |
| Rocky Hill, CT | Harrington Engineering Inc. | 12282908AE | Apprenticeship Sponsor | Jun 30, 2010 |
| Cheshire, CT | Harrington Home Systems LLC | 95DAB0154B | Apprenticeship Sponsor | Jun 30, 2010 |
| Pawcatuck, CT | Harrington Plumbing & Heating | D785CD307B | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | Harris Security LLC | C399E9C232 | Apprenticeship Sponsor | Jun 30, 2008 |
| Bristol, CT | HARRISON ELECTRIC & CONSTRUCTION LLC | 1FD5DB60B3 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Woodbury, CT | HARRISON ELECTRIC LLC | 1899F274D0 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Stamford, CT | Harry P. Carpenter and Sons, Inc. | DDC0F9DB89 | Apprenticeship Sponsor | Jun 30, 2015 |
| Washington Depot, CT | HARRY WRIGHT ELECTRICAL CO. | F0C6D0097A | Apprenticeship Sponsor | Jun 30, 2027 |
| South Windsor, CT | Hart Electric LLC | 7E2ACD2173 | Apprenticeship Sponsor | Jun 30, 2008 |
| Glastonbury, CT | Hart Mechanical, Inc. | 35A64E306F | Apprenticeship Sponsor | Jun 30, 2027 |
| West Hartford, CT | HARTFORD BOILER REPAIR WORKS INC. | 03E60DFFDF | Apprenticeship Sponsor | Jun 30, 2027 |
| Windsor Locks, CT | Hartford Electrical Construction, LLC | C24DD7C213 | Apprenticeship Sponsor | Jun 30, 2010 |
| Hartford, CT | Hartford Electricians JATC Local 35 | 211A2F26E7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Plainville, CT | Hartford Fire Equipment Co. | 4D912387BE | Apprenticeship Sponsor | Jun 30, 2009 |
| Newington, CT | Hartford Glass Co. | 3FB39BEEDF | Apprenticeship Sponsor | Jun 30, 2010 |
| Newington, CT | HARTFORD HEALTHCARE CORP | 3AD91DDBB3 | Wholesaler of Drugs, Cosmetics & Medical Devices + 1 more | Jun 30, 2027 |
| Hartford, CT | HARTFORD HOSPITAL | 70B350C305 | Controlled Substance Registration For Hospitals + 1 more | Feb 28, 2027 |
| Glastonbury, CT | Hartford Mechanical Co., The | 0A4EDFD7B6 | Apprenticeship Sponsor | Jun 30, 2007 |
| South Windsor, CT | Hartford Plumbing & Heating | F83DC73BE1 | Apprenticeship Sponsor | Jun 30, 2024 |
| Bloomfield, CT | Hartford Sprinkler Co., Inc. | 6BBE9CB5BA | Apprenticeship Sponsor | Jun 30, 2027 |
| Wallingford, CT | Hartman Company, LLC | 917763F8E8 | Apprenticeship Sponsor | Jun 30, 2027 |
| Greenwich, CT | Harvey Electronics Inc. | CCE9E91C9C | Apprenticeship Sponsor | Jun 30, 2006 |
| Essex, CT | Haskins Electric, LLC | B86885102C | Apprenticeship Sponsor | Jun 30, 2027 |
| Ashford, CT | Hastillo Electric Inc. | B68EFFD555 | Apprenticeship Sponsor | Jun 30, 2019 |
| North Branford, CT | HAVCO Comfort Systems, Inc. | 340E1A82D6 | Apprenticeship Sponsor | Jun 30, 2011 |
| Stafford Springs, CT | Haven Fire Protection LLC | 5ED9471520 | Apprenticeship Sponsor | Jun 30, 2026 |
| Northfield, CT | Hayes Plumbing, LLC | F895CA7BBA | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Seymour, CT | Haynes Group | 504B4041DD | Apprenticeship Sponsor | Jun 30, 2014 |
| Wallingford, CT | Hazelwood Excavating Inc | 8CA9D9E49A | Demolition Contractor + 1 more | Jul 31, 2027 |
| North Haven, CT | HB Communications Inc. | 02E7469FBA | Apprenticeship Sponsor | Jun 30, 2022 |
| Lisbon, CT | HDL, LLC | C8F4B0F7B1 | Apprenticeship Sponsor | Jun 30, 2022 |
| Trumbull, CT | HDM Services, LLC | D28E88C5EB | Apprenticeship Sponsor | Jun 30, 2019 |
| Hartford, CT | Headline Hair Designers | 48045FE0F7 | Apprenticeship Sponsor | Jun 30, 2021 |
| Southington, CT | HEAT SHOCK 2 LLC | 8D0ECBB613 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Bristol, CT | Heat Wave Mechanical, Inc. | 849EFE4393 | Apprenticeship Sponsor | Jun 30, 2004 |
| Norwich, CT | Heating & Cooling Solutions, LLC | BA5057C077 | Apprenticeship Sponsor | Jun 30, 2027 |
| Danbury, CT | Hefferon Heating & Cooling LLC | CCE482E298 | Apprenticeship Sponsor | Jun 30, 2027 |
| East Berlin, CT | Heise Industries, Inc. | 3A81C4E0A2 | Apprenticeship Sponsor | Jun 30, 2018 |
| Trumbull, CT | HELIO SOLAR | 80E13BF4B1 | Apprenticeship Sponsor | Jun 30, 2026 |
| Norwalk, CT | Hellas Air Temp Inc. | 9D5D726319 | Apprenticeship Sponsor | Jun 30, 2027 |
| Groton, CT | HELLO, GORGEOUS SALON | 2DD00337A7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bethel, CT | Helmont Mechanical, LLC | 45AB84A773 | Apprenticeship Sponsor | Jun 30, 2012 |
| Portland, CT | Henkels & McCoy, Inc. | AD0FB9B188 | Apprenticeship Sponsor | Jun 30, 2017 |
| Beacon Falls, CT | Hennessey's H.d. Electric Company | A97EC4A550 | Apprenticeship Sponsor | Jun 30, 2009 |
| Westport, CT | Herb Willigan Electrical Contractors | 49F25B2F19 | Apprenticeship Sponsor | Jun 30, 2011 |
| Milford, CT | Heritage Heating & Air LLC | EF43C15B6E | Apprenticeship Sponsor | Jun 30, 2027 |
| Willington, CT | Heritage Oil Inc. | B7D2D5C26E | Apprenticeship Sponsor | Jun 30, 2022 |
| Stamford, CT | Heritage Plumbing & Heating Inc. | 86CD729995 | Apprenticeship Sponsor | Jun 30, 2013 |
| Southbury, CT | HERITAGE VILLAGE MASTER ASSOCIATION | CDE8B5C5B5 | Supplemental Responder + 1 more | Dec 31, 2026 |
| Amston, CT | Herrick Electric LLC | 0FF9BEB22F | Apprenticeship Sponsor | Jun 30, 2027 |
| Ledyard, CT | Hespeler Electrical Contracting LLC | 8298889767 | Apprenticeship Sponsor | Jun 30, 2007 |
| Bridgeport, CT | HI HO PETROLEUM | 909C61456F | Home Heating Fuel Dealer + 1 more | Sep 30, 2027 |
| West Haven, CT | Hi-Tech Electricom | 5F99BF3B8F | Apprenticeship Sponsor | Jun 30, 2018 |
| West Hartford, CT | Hi-Tech Mechanical Services LLC | 85FC56DE8E | Apprenticeship Sponsor | Jun 30, 2027 |
| Harwinton, CT | Hi-Tech Mechanical, LLC | 68C3F89E39 | Apprenticeship Sponsor | Jun 30, 2027 |
| Cromwell, CT | HICKS PLUMBING LLC | B417B7AD3D | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Middletown, CT | Higganum Electrical Contractors | 5AD5C0FEC9 | Apprenticeship Sponsor | Jun 30, 2010 |
| Pomfret Center, CT | HIGGINS & SONS OIL SERVICE, INC. | 0BC0B34EA6 | Apprenticeship Sponsor | Jun 30, 2026 |
| East Hampton, CT | Higgins Enterprises Inc. | 5F5F1933CE | Apprenticeship Sponsor | Jun 30, 2027 |
| Brookfield, CT | High Performance Heating & Air Conditioning | 226FFBACDB | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | High Ridge Plumbing & Heat LLC | 51FB00E862 | Apprenticeship Sponsor | Jun 30, 2004 |
| Naugatuck, CT | High Rock Water and Mechanical | 5B8483FE84 | Apprenticeship Sponsor | Jun 30, 2027 |
| South Windsor, CT | High Tech Comfort LLC | 92E8E4D6F0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ellington, CT | High Tech Electric, LLC | 58D9591C8A | Apprenticeship Sponsor | Jun 30, 2010 |
| Warren, CT | High Wire Electric, LLC | 9906306FB8 | Apprenticeship Sponsor | Jun 30, 2027 |
| Norwalk, CT | High-Tech 2 | 315EFA03D9 | Apprenticeship Sponsor | Jun 30, 2010 |
| Baltic, CT | Highland Electric, LLC | 1D5978EC88 | Apprenticeship Sponsor | Jun 30, 2027 |
| Manchester, CT | Highland Manufacturing, Inc. | 848DB51B08 | Apprenticeship Sponsor | Jun 30, 2027 |
| Derby, CT | Highlands Heating & Cooling, LLC | EBC95CDA33 | Apprenticeship Sponsor | Jun 30, 2012 |
| Ledyard, CT | Hightower Electric, LLC | 4FA1190E7D | Apprenticeship Sponsor | Jun 30, 2027 |
| Hamden, CT | Highwood Mechanical, LLC. | 4F87F82406 | Apprenticeship Sponsor | Jun 30, 2024 |
| Mystic, CT | Hilbert's Electric, LLC | 441F3F46F6 | Apprenticeship Sponsor | Jun 30, 2016 |
| Cos Cob, CT | Hillcrest Plumbing & Heating Inc. | 8490AF1D19 | Apprenticeship Sponsor | Jun 30, 2008 |
| Putnam, CT | Hilltop Plumbing LLC | 76A652AC6C | Apprenticeship Sponsor | Jun 30, 2020 |
| Enfield, CT | Hinckley Construction | 419F4FE127 | Apprenticeship Sponsor | Jun 30, 2025 |
| Hartford, CT | Hines Interests Limited Partnership | E966EC394D | Apprenticeship Sponsor | Jun 30, 2016 |
| South Windsor, CT | Hipoint Heating & Cooling, Inc. | F7824630EA | Apprenticeship Sponsor | Jun 30, 2022 |
| Lebanon, CT | HIRAM ELECTRIC, LLC | 35B6937726 | Apprenticeship Sponsor | Jun 30, 2026 |
| Hamden, CT | Hird Electrical Contractors, LLC | 6AA6ECB4F3 | Apprenticeship Sponsor | Jun 30, 2012 |
| New Milford, CT | Hirsch Electrical Contractors, LLC | 86814FBF4A | Apprenticeship Sponsor | Jun 30, 2006 |
| Naugatuck, CT | Hitek Electronics, LLC | 2E1959BCDA | Apprenticeship Sponsor | Jun 30, 2023 |
| Middletown, CT | HL Bowman | 8FB2C232C3 | Apprenticeship Sponsor | Jun 30, 2027 |
| Wolcott, CT | HOB Industries, Inc. | ECB0161072 | Apprenticeship Sponsor | Jun 30, 2021 |
| Durham, CT | Hobson & Motzer, Inc. | 84A88C46A1 | Apprenticeship Sponsor | Jun 30, 2027 |
| Shelton, CT | Hocon Gas of Torrington, LLC | 1D63C7995B | Apprenticeship Sponsor | Jun 30, 2026 |
| Stamford, CT | Hoffman Engineering, LLC | F03711D25B | Apprenticeship Sponsor | Jun 30, 2025 |
| Trumbull, CT | Hoffman Fuel Company | 19B66EB260 | Apprenticeship Sponsor | Jun 30, 2027 |
| Wilton, CT | Hoffman Landscapes, Inc. | 8CD5A6008B | Apprenticeship Sponsor | Jun 30, 2016 |
| Fairfield, CT | HOLCOMB ELECTRIC | 04DDA193DA | Apprenticeship Sponsor | Jun 30, 2027 |
| Old Lyme, CT | Holland & Sons Plumbing | C7731B0593 | Apprenticeship Sponsor | Jun 30, 2017 |
| Winsted, CT | Holmes Electric LLC | 53379A573F | Apprenticeship Sponsor | Jun 30, 2027 |
| Wallingford, Ct, CT | HOLO-KROME, DIVISION OF FASTENAL MANUFACTURING | 39BF575B81 | Apprenticeship Sponsor | Jun 30, 2027 |
| Woodbury, CT | Home & Life Security, Inc. | A2D491F9E1 | Apprenticeship Sponsor | Jun 30, 2010 |
| East Haven, CT | Home Comfort Heating & Cooling, LLC | 6DB4A38938 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stratford, CT | Home Comfort Practice, Inc. | AA67FB534A | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Monroe, CT | Home Comfort Technologies LLC | DACC9530A2 | Apprenticeship Sponsor | Jun 30, 2009 |
| Meriden, CT | Home Electrical Services, LLC | 1F4A1EB178 | Apprenticeship Sponsor | Jun 30, 2020 |
| West Haven, CT | Home Heating & Cooling, Inc. | 670898ECA9 | Apprenticeship Sponsor | Jun 30, 2006 |
| Voluntown, CT | Home Heating Service | 3D4456CC10 | Apprenticeship Sponsor | Jun 30, 2014 |
| North Branford, CT | Home Services & More LLC dba Mr.Rooter Plumbing | 4AE63FF224 | Apprenticeship Sponsor | Jun 30, 2027 |
| Norwalk, CT | HOME SQUARE, LLC | 038E93597F | Apprenticeship Sponsor | Jun 30, 2027 |
| Monroe, CT | Home Technologies Inc. | 07BE4EFD36 | Apprenticeship Sponsor | Jun 30, 2009 |
| Fairfield, CT | Homeguard, Inc. | BC95F1C366 | Apprenticeship Sponsor | Jun 30, 2020 |
| Coventry, CT | Homeland Fiber Optic, LLC | CF2C4BC2A7 | Apprenticeship Sponsor | Jun 30, 2025 |
| Ellington, CT | HOMESTEAD FUEL INC | 1541E41E2C | Home Heating Fuel Dealer + 4 more | Sep 30, 2027 |
| Avon, CT | Hometown Heating & Cooling, LLC | AC5EAC0938 | Apprenticeship Sponsor | Jun 30, 2027 |
| Orange, CT | Hometown Plumbing & HVAC, LLC | B936987E07 | Apprenticeship Sponsor | — |
| Durham, CT | Hometronics Lifestyles, LLC | E025BDAC68 | Apprenticeship Sponsor | Jun 30, 2017 |
| Plantsville, CT | Honest Air, LLC | 3DB8330ED2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stratford, CT | HONEY BEAR LEARNING CENTER | A40206DDC7 | Child Care Center + 1 more | Apr 30, 2030 |
| Rocky Hill, CT | Honeywell International Inc. | D87B8E04A2 | Apprenticeship Sponsor | Jun 30, 2012 |
| Bloomfield, CT | Honors Electrical LLC | F09BEB7081 | Apprenticeship Sponsor | Jun 30, 2027 |
| Portland, CT | HOP ENERGY LLC DBA AUTOMATIC TLC | 87F8B043E5 | Apprenticeship Sponsor | Jun 30, 2027 |
| New London, CT | Hop Energy, LLC dba DDLC Energy | BB05DFCBEC | Apprenticeship Sponsor | Jun 30, 2027 |
| Portland, CT | Hop Energy, LLC dba Kaufman Fuel Company | CD6C1427EA | Apprenticeship Sponsor | Jun 30, 2027 |
| Portland, CT | HOP Energy, LLC dba Mercury Energy | C0A54F6D78 | Apprenticeship Sponsor | Jun 30, 2027 |
| Portland, CT | HOP Energy, LLC dba Valley Oil | FA1086F32A | Apprenticeship Sponsor | Jun 30, 2027 |
| Prospect, CT | HOPE MECHANICAL, LLC | 8FF76D2BBC | Apprenticeship Sponsor | Jun 30, 2024 |
| Prospect, CT | HOPE PLUMBING, LLC | 02DB72FAE3 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bridgeport, CT | HORBERG INDUSTRIES, INC. | 59D61C280B | Apprenticeship Sponsor | Jun 30, 2027 |
| Wethersfield, CT | Horizon Technologies, Inc. | EB07A827AE | Apprenticeship Sponsor | Jun 30, 2014 |
| Canton, CT | Horton Electrical Services, LLC | 74200B220E | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | Horvath Plumbing & Heating, LLC | 454F8B57F8 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| New Britain, CT | HOSPITAL FOR SPECIAL CARE | 001A6526F4 | Chronic Disease Hospital + 5 more | Mar 31, 2028 |
| Fairfield, CT | Hotchkiss Refrigeration & Air Conditioning Co | 9D2077961F | Apprenticeship Sponsor | Jun 30, 2005 |
| Danbury, CT | Hotwired Electric LLC | 3A3D58B7AA | Apprenticeship Sponsor | Jun 30, 2027 |
| Thompson, CT | Houle Electric LLC | 0B13DBA0F2 | Apprenticeship Sponsor | Jun 30, 2020 |
| New Milford, CT | Housatonic Valley Well Pump Services, LLC | A880CC9EB8 | Apprenticeship Sponsor | Jun 30, 2026 |
| Glastonbury, CT | House Brothers Plumbing Contractors, Inc. | 70CABE267B | Apprenticeship Sponsor | Jun 30, 2027 |
| Willimantic, CT | House of Blendz | AC92672307 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Britain, CT | House of Dolls Beauty Salon | 1D450E8AA5 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Milford, CT | House of Warmth Stove & Fireplace Shop, LLC | E739AD8DA7 | Apprenticeship Sponsor | Jun 30, 2022 |
| East Lyme, CT | Houseman Electric, LLC | 0988369C42 | Apprenticeship Sponsor | Jun 30, 2017 |
| Hartford, CT | Housing Authority of the City of Hartford | BF97A420F3 | Apprenticeship Sponsor | Jun 30, 2026 |
| Meriden, CT | Housing Authority of the City of Meriden | 94D9DEC070 | Apprenticeship Sponsor | Jun 30, 2018 |
| New Britain, CT | HOUZPITAL LLC | 98A981ECB3 | Lead Consultant Contractor + 5 more | Sep 30, 2027 |
| Hamden, CT | Howard Paving Co., Inc. | 4451A265D6 | Apprenticeship Sponsor | Jun 30, 2006 |
| Fairfield, CT | Howell Fuel Inc. | 3B9EA889C4 | Apprenticeship Sponsor | Jun 30, 2013 |
| South Glastonbury, CT | HP Electrical Services LLC | E8230C605A | Apprenticeship Sponsor | Jun 30, 2021 |
| Suffield, CT | HP Hood | EFB46CDCAD | Apprenticeship Sponsor | Jun 30, 2023 |
| Bridgeport, CT | HR Candee Construction Company Inc. | 6D77EB3AE3 | Apprenticeship Sponsor | Jun 30, 2013 |
| Andover, CT | HR HEATING SERVICES LLC | AD4499A002 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Goshen, CT | HTH Automatic Sprinkler, LLC | A5C14385A2 | Apprenticeship Sponsor | Jun 30, 2026 |
| Stratford, CT | Hubbell Electric Heater Co. The Electric Heater Company | CE7B5FF45C | Apprenticeship Sponsor | Jun 30, 2023 |
| Winsted, CT | Hubbell Power Systems, Inc. | DB0F7A9C10 | Apprenticeship Sponsor | Jun 30, 2027 |
| Portland, CT | HUBERT E. BUTLER CONSTRUCTION COMPANY LLC | D0C22F7A9A | Demolition Contractor + 4 more | Sep 30, 2027 |
| Ellington, CT | HUGH'S MECHANICAL EQUIPMENT LLC | 53CB8A44DB | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| New Hartford, CT | Hull Alarms, LLC | 9CE3F00EB5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Farmington, CT | HUMBLE ELECTRIC SERVICE AND CONSULTING, LLC | A87A6FA651 | Apprenticeship Sponsor | Jun 30, 2027 |
| North Haven, CT | Hungerfords, Inc. | 8C265804EC | Apprenticeship Sponsor | Jun 30, 2027 |
| West Haven, CT | Hunt Electric, LLC | 1FC2142421 | Apprenticeship Sponsor | Jun 30, 2026 |
| Niantic, CT | Hunter Electric, Inc. | 449E169639 | Apprenticeship Sponsor | Jun 30, 2022 |
| Norwalk, CT | Hunter Mechanical Inc. | 8883D6369D | Apprenticeship Sponsor | Jun 30, 2014 |
| Goshen, CT | Hunter Mechanical, LLC | DB531B8F3F | Apprenticeship Sponsor | Jun 30, 2027 |
| Shelton, CT | Huntington Electric, LLC | AA70002CC7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Woodbury, CT | HUSKY ENERGY & PROPANE | 51415D9A6D | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Oxford, CT | Husky Fuel, LLC | 1061BBD638 | Apprenticeship Sponsor | Jun 30, 2024 |
| Shelton, CT | HVAC SPECIALISTS, LLC | 7010C41726 | Apprenticeship Sponsor | Jun 30, 2027 |
| Portland, CT | HVAC Specialties, LLC | 17DD2D8983 | Apprenticeship Sponsor | Jun 30, 2006 |
| Colchester, CT | HVAC Unlimited LLC | E3290BAE7F | Apprenticeship Sponsor | Jun 30, 2005 |
| Preston, CT | Hy-TEK Plumbing & Heating, LLC | 4C1DA8A8C5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Woodstock, CT | Hybrid Services, LLC | 2773EB3FA7 | Apprenticeship Sponsor | Jun 30, 2024 |
| Southington, CT | Hydro Dynamic Engineering, LLC | 09593D76FC | Apprenticeship Sponsor | Jun 30, 2023 |
| Fairfield, CT | Hydro Mechanical Plumbing & Heating, LLC | 21BAC54671 | Apprenticeship Sponsor | Jun 30, 2023 |
| Colchester, CT | Hydro-Pure Water Treatment, LLC | 4E14962F78 | Apprenticeship Sponsor | Jun 30, 2027 |
| West Hartford, CT | Hygrade Mechanical Services, LLC | 839A209811 | Apprenticeship Sponsor | Jun 30, 2027 |
| Shelton, CT | HYPER FUSION HEATING AND COOLING | 7636F7305C | Apprenticeship Sponsor | Jun 30, 2022 |
| Newington, CT | HYPER HEAT AND COOL, LLC | 9AA07BE93F | Apprenticeship Sponsor | Jun 30, 2026 |
| Plantsville, CT | Hyper Heating & Cooling, LLC | 8F9BFF3489 | Apprenticeship Sponsor | Jun 30, 2025 |
| Groton, CT | I Got You Next Barbershop | 25E98C13A8 | Apprenticeship Sponsor | Jun 30, 2022 |
| Monroe, CT | I.B.E.W. JATC Local Union 488 | FB4648A19E | Apprenticeship Sponsor | Jun 30, 2027 |
| Putnam, CT | I.C. Mechanical, Inc. | 9EC1E49498 | Apprenticeship Sponsor | Jun 30, 2016 |
| Avon, CT | I.H.S. Electric, LLC | 69FCCCBAA0 | Apprenticeship Sponsor | Jun 30, 2013 |
| Thomaston, CT | I.T.S. Electric, LLC | B67E256F5E | Apprenticeship Sponsor | Jun 30, 2027 |
| Yalesville, CT | I2S, LLC | 8FE556F00C | Apprenticeship Sponsor | Jun 30, 2015 |
| Morris, CT | i2Systems, Inc. | 10FBEF1ED9 | Apprenticeship Sponsor | Jun 30, 2025 |
| Monroe, CT | Ideal Contracting, LLC | 7C6209E989 | Apprenticeship Sponsor | Jun 30, 2023 |
| Oxford, CT | Ideal Electric Ltd, LLC | 068AC5C0D9 | Apprenticeship Sponsor | Jun 30, 2027 |
| Unionville, CT | Ideal Electrical Solutions, LLC | A737D676C1 | Apprenticeship Sponsor | Jun 30, 2027 |
| Tolland, CT | Ideal Mechanical Services, LLC | 9A8B1E12B9 | Apprenticeship Sponsor | Jun 30, 2027 |
| Southington, CT | Ideal Plumbing & Heating Inc. | 817B40D82F | Apprenticeship Sponsor | Jun 30, 2007 |
| Trumbull, CT | IELECTRICO LLC | 1CC05A5C13 | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| West Hartford, CT | Igor's Electrical Services, LLC | B7404E8363 | Apprenticeship Sponsor | Jun 30, 2027 |
| Meriden, CT | II Waavy Barber Lounge | 4AB08D2FEE | Apprenticeship Sponsor | Jun 30, 2027 |
| Wallingford, CT | Illuminated Electrical Services, LLC | A7EC07A0B0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Hartford, CT | ILLUMINATION ELECTRIC, LLC | 39B85C9378 | Apprenticeship Sponsor | Jun 30, 2027 |
| Orange, CT | Illumination Group, LLC | B1010AFDD2 | Apprenticeship Sponsor | Jun 30, 2019 |
| Fairfield, CT | Imbrogno Electric, LLC | C23187981E | Apprenticeship Sponsor | Jun 30, 2026 |
| Torrington, CT | IMPACT Fire Services LLC ( Torrington) Electrical ony | D00120DEC1 | Apprenticeship Sponsor | Jun 30, 2027 |
| Willimantic, CT | IMPACT FIRE SERVICES, LLC | 2679855C28 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ludlow, MA | IMPACT FIRE SERVICES, LLC-MASS | 1E15BFB951 | Apprenticeship Sponsor | Jun 30, 2027 |
| Trumbull, CT | Imperial Electric | 86DDCD31C9 | Apprenticeship Sponsor | Jun 30, 2008 |
| South Windsor, CT | Imperial Plumbing & Oil Company | 1EE60533E5 | Apprenticeship Sponsor | Jun 30, 2024 |
| Bloomfield, CT | INCORPORATED INDUSTRIES LLC | 0EB6DF31CB | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Wallingford, CT | Incredible Oil | F46D1EF38C | Apprenticeship Sponsor | Jun 30, 2020 |
| Milford, CT | Indeco North America, Inc. | F5E6F91977 | Apprenticeship Sponsor | Jun 30, 2019 |
| Coventry, CT | Independent Electric Co. | 2761DA4BAE | Apprenticeship Sponsor | Jun 30, 2010 |
| Uncasville, CT | Independent Mechanical, Inc. | F8A58F4CEB | Apprenticeship Sponsor | Jun 30, 2027 |
| Shelton, CT | Indian Well Country Store, Inc. dba Electrical MD | 47558615F0 | Apprenticeship Sponsor | Jun 30, 2017 |
| Branford, CT | Indoor Comfort Heating & Cooling, LLC | F2BDFE66C5 | Apprenticeship Sponsor | Jun 30, 2026 |
| Newington, CT | Industrial Boiler Repair Inc. | 94ED5C1170 | Apprenticeship Sponsor | Jun 30, 2007 |
| Bloomfield, CT | Industrial Controls & Service Company, LLC | 752F3FB699 | Apprenticeship Sponsor | Jun 30, 2010 |
| Waterbury, CT | Industrial Drives and Controls | BA005A964F | Apprenticeship Sponsor | Jun 30, 2027 |
| Plainville, CT | INDUSTRIAL ELECTRIC & CONSTRUCTION, LLC | E915B8F64A | Apprenticeship Sponsor | Jun 30, 2027 |
| Milford, CT | Industrial Electric Service Inc. | CE3C294E71 | Apprenticeship Sponsor | Jun 30, 2005 |
| Cheshire, CT | INDUSTRIAL HEATER CORP. | 5A48535E41 | Apprenticeship Sponsor | Jun 30, 2025 |
| Unionville, CT | Industrial Mechanical Services Co., Inc. | 017059BF5C | Apprenticeship Sponsor | Jun 30, 2007 |
| Westfield, MA | Industrial Technical Services, Inc. | 442A7C45E5 | Apprenticeship Sponsor | Jun 30, 2016 |
| Kensington, CT | Industry Hair Studio Jzycin, LLC | 930B00FE36 | Apprenticeship Sponsor | Jun 30, 2020 |
| New Hartford, CT | Inertia Dynamics, LLC | 7D02F09081 | Apprenticeship Sponsor | Jun 30, 2021 |
| New London, CT | INET LLC | BC2ADD3C21 | Apprenticeship Sponsor | Jun 30, 2007 |
| Ansonia, CT | Infinite Electrical Systems | 1E34FBA5F7 | Apprenticeship Sponsor | — |
| Harwinton, CT | Infinite HVAC Solutions, LLC | 6B2C62E462 | Apprenticeship Sponsor | Jun 30, 2026 |
| Milford, CT | Infinity Electric | CF74425A7C | Apprenticeship Sponsor | Jun 30, 2026 |
| Milford, CT | Infinity Heating and Cooling, LLC | 98C1CF897E | Apprenticeship Sponsor | Jun 30, 2025 |
| Windsor, CT | INLAND PROPERTIES LLC | 5C7724AD5A | New Home Construction Contractor + 2 more | Mar 31, 2027 |
| Shelton, CT | INLINE PLASTICS CORP | 1579FC988D | Apprenticeship Sponsor | Jun 30, 2026 |
| Prospect, CT | Inner City Electrical, LLC | 3504EE2FA8 | Apprenticeship Sponsor | Jun 30, 2026 |
| Southington, CT | Innovative Electric | 24B734AF0B | Apprenticeship Sponsor | Jun 30, 2006 |
| Plantsville, CT | Innovative Electrical Sevices, LLC | 4076A571F9 | Apprenticeship Sponsor | Jun 30, 2026 |
| Milford, CT | Innovative Heating & Cooling, LLC | 536B19F568 | Apprenticeship Sponsor | Jun 30, 2027 |
| Newington, CT | Innovative Heating and Air Conditioning | F7EB608210 | Apprenticeship Sponsor | Jun 30, 2020 |
| Milford, CT | Innovative Sales & Machine Services, LLC | 631AA6E2AA | Apprenticeship Sponsor | Jun 30, 2025 |
| Tolland, CT | INNOVATIVE SERVICES INC | E72293CAE2 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Seymour, CT | Insane Iron LLC | 3F62EECDB4 | Apprenticeship Sponsor | Jun 30, 2010 |
| Bristol, CT | Insight Plus Technology, LLC | 071E5A8B1F | Apprenticeship Sponsor | Jun 30, 2024 |
| Wolcott, CT | InstaPlumbing, LLC | DC0BC8A598 | Apprenticeship Sponsor | Jun 30, 2024 |
| New Britain, CT | Integra - Cast, Inc. | B9C8402110 | Apprenticeship Sponsor | Jun 30, 2011 |
| Rocky Hill, CT | Integrated Building Solutions, LLC | 2C037F418E | Apprenticeship Sponsor | Jun 30, 2021 |
| Glastonbury, CT | Integrated Electrical Solutions, LLC | D7DA38687E | Apprenticeship Sponsor | Jun 30, 2026 |
| Darien, CT | Integrated Protection Services | 795502D47F | Apprenticeship Sponsor | Jun 30, 2025 |
| Oakdale, CT | Integrated Security Solutions, LLC | ED6EC785E8 | Apprenticeship Sponsor | Jun 30, 2026 |
| Danbury, CT | Integrated Security Systems, Ltd. | 98A6740A09 | Apprenticeship Sponsor | Jun 30, 2011 |
| East Hartford, CT | Integrated Systems Services, LLC | 96AD565992 | Apprenticeship Sponsor | Jun 30, 2024 |
| Wallingford, CT | Integrated Technical Systems Incorporated | C6A3503540 | Apprenticeship Sponsor | Jun 30, 2027 |
| East Windsor, CT | INTEGRATED WIRING SOLUTIONS LLC | 8EE820872D | Home Improvement Contractor + 1 more | Mar 31, 2027 |
| Danbury, CT | Integrity Electric, LLC | FAE5F6890A | Apprenticeship Sponsor | Jun 30, 2005 |
| Torrington, CT | Integrity Electrical Contracting Inc. | 736565AAF6 | Apprenticeship Sponsor | Jun 30, 2011 |
| Orange, CT | Integrity Mechanical | 52786A0F60 | Apprenticeship Sponsor | Jun 30, 2023 |
| Farmington, CT | Integrity Mfg., LLC | B12565DF8C | Apprenticeship Sponsor | Jun 30, 2024 |
| Cheshire, CT | INTERIOR BUILDING CONTRACTORS LLC | 2EA4BE8A4E | Major Contractor + 1 more | Jun 30, 2027 |
| Cheshire, CT | Interior Environments, Inc. | 863F7C3900 | Apprenticeship Sponsor | Jun 30, 2008 |
| Old Saybrook, CT | Interior Partition Specialists LLC | 4E938E6CEE | Apprenticeship Sponsor | Jun 30, 2019 |
| Plainfield, CT | Intermark Fabric Corporation | 13C3B654A3 | Apprenticeship Sponsor | Jun 30, 2005 |
| Colchester, CT | International Cordage East, Ltd | F76A2CC114 | Apprenticeship Sponsor | Jun 30, 2022 |
| New Britain, CT | International Hair Stylist, LLC | 7439F7C3B1 | Apprenticeship Sponsor | Jun 30, 2022 |
| Monroe, CT | Interstate Electrical Contractors | 7A9BDFFFF6 | Apprenticeship Sponsor | Jun 30, 2016 |
| Windsor, CT | INTERSTATE ELECTRICAL SERVICES | 7627D19502 | Apprenticeship Sponsor | Jun 30, 2027 |
| Watertown, CT | INTERSTATE MECHANICAL INC | 16CF17731F | New Home Construction Contractor + 1 more | Mar 31, 2027 |
| Bridgeport, CT | INTERSTATE PROPERTY SOLUTIONS, LLC | 979221D704 | Apprenticeship Sponsor | Jun 30, 2026 |
| Plainville, CT | INTERSTATE WELDING & MECHANICAL CO., INC. | 60B88D4069 | Apprenticeship Sponsor | Jun 30, 2027 |
| Orange, CT | INTUITIVE SURGICAL | A9D99A0736 | Controlled Substance Laboratory + 1 more | Jan 31, 2027 |
| Newtown, CT | Ion Security, LLC | 2FEDBCBC41 | Apprenticeship Sponsor | Jun 30, 2015 |
| Middlebury, CT | ION Solar Pros, LLC | 5FF8AB7CE7 | Apprenticeship Sponsor | Jun 30, 2027 |
| North Haven, CT | IOVANNA MECHANICAL, LTD | C8DD137BE0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Vernon, CT | Ireland Oil Co., Inc | A878A9C637 | Apprenticeship Sponsor | Jun 30, 2020 |
| Niantic, CT | Irie Energy Heating & Cooling, LLC | EA0AFC2FAA | Apprenticeship Sponsor | Jun 30, 2027 |
| North Haven, CT | Iron Workers JATC Local Union 424 | E1C393E52A | Apprenticeship Sponsor | Jun 30, 2027 |
| Boston, MA | Iron Workers Local 7 JATC | 119BCA972E | Apprenticeship Sponsor | Jun 30, 2018 |
| Hartford, CT | Iron Workers Local Union #15 | 850CCC18D3 | Apprenticeship Sponsor | Jun 30, 2027 |
| East Providence, RI | Ironworkers Local 37 | 15E53F2F7A | Apprenticeship Sponsor | Jun 30, 2024 |
| North Branford, CT | Irrigation Specialists LLC | 29D1A8A7A6 | 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.