Apprenticeship Sponsor — page 17 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 |
|---|---|---|---|---|
| Clinton, CT | Scag's Plumbing, LLC | 927D3C5500 | Apprenticeship Sponsor | Jun 30, 2026 |
| Windsor, CT | Scapa Tapes North America, LLC | 71FF32CF1B | Apprenticeship Sponsor | Jun 30, 2022 |
| Bristol, CT | Scarapeti Electric Services, LLC | FD5E31C463 | Apprenticeship Sponsor | Jun 30, 2012 |
| Prospect, CT | Scarpati Electric Service | E292A21059 | Apprenticeship Sponsor | Jun 30, 2010 |
| Guilford, CT | SCAT CORP DBA ROOTERMAN | 2113731894 | Apprenticeship Sponsor | Jun 30, 2027 |
| Milford, CT | Sced's Heating & Cooling, LLC | C5A3E805E7 | Apprenticeship Sponsor | — |
| Danbury, CT | SCHAEFFLER GROUP USA, INC. | 2153677A7F | Apprenticeship Sponsor | Jun 30, 2027 |
| Eastford, CT | Schiavetti Plumbing & Heating, Inc. | CAADB7CD1A | Apprenticeship Sponsor | Jun 30, 2026 |
| Milford, CT | SCHICK MANUFACTURING, INC. | BDF61B3AEA | Apprenticeship Sponsor | Jun 30, 2026 |
| Naugatuck, CT | Schmidt Electric, LLC | 7FAA095EBE | Apprenticeship Sponsor | Jun 30, 2027 |
| Southbury, CT | Schmidt Plumbing & Heating Co., Inc. | 590218D5BE | Apprenticeship Sponsor | Jun 30, 2025 |
| Milford, CT | Schmidt Tool Manufacturing, Inc. | B146DBE8CB | Apprenticeship Sponsor | Jun 30, 2019 |
| New Milford, CT | Schomber Electric, LLC | 3FBD9E978E | Apprenticeship Sponsor | Jun 30, 2027 |
| Terryville, CT | Schultz Corporation | E754C1B9A8 | Apprenticeship Sponsor | Jun 30, 2027 |
| Portland, CT | Schultz Electric Inc. | 52135AD40B | Apprenticeship Sponsor | Jun 30, 2026 |
| New Haven, CT | Schulz Electric Company | 323484BB7F | Apprenticeship Sponsor | Jun 30, 2013 |
| Clinton, CT | SCHUMACK ENGINEERED CONSTRUCTION | 5AC697E45D | Home Improvement Contractor + 2 more | Mar 31, 2027 |
| Hartford, CT | SCISSORS SOCIETY INC. | 77CB9AE6A3 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bloomfield, CT | Scobar Electrical Contractors, Inc. | D76966681E | Apprenticeship Sponsor | Jun 30, 2012 |
| Enfield, CT | Scott's Electric Inc. | 75325058FB | Apprenticeship Sponsor | Jun 30, 2023 |
| East Hartland, CT | Scott's Plumbing & Heating Inc. | C53CF86C3C | Apprenticeship Sponsor | Jun 30, 2020 |
| Torrington, CT | Scoville Plumbing & Heating Inc. | C6F45E7307 | Apprenticeship Sponsor | Jun 30, 2017 |
| Cromwell, CT | Scovills Landscape Contractors LLC | AFC4F3F77D | Apprenticeship Sponsor | Jun 30, 2022 |
| South Windsor, CT | SCW Enterprises, LLC | 6C518B8485 | Apprenticeship Sponsor | Jun 30, 2011 |
| Hamden, CT | SDC ELECTRICAL SERVICE LLC | EB7F867764 | Apprenticeship Sponsor | Jun 30, 2027 |
| Monroe, CT | SDF Electric, LLC | DFEA4E5DD0 | Apprenticeship Sponsor | Jun 30, 2018 |
| New Haven, CT | Seaboard Inc. | 3650633269 | Apprenticeship Sponsor | Jun 30, 2008 |
| Oakville, CT | Seabourne Electric, LLC | 4BE08AA114 | Apprenticeship Sponsor | Jun 30, 2015 |
| Danbury, CT | Sealed Air Corp. | D3B43E8A66 | Apprenticeship Sponsor | Jun 30, 2011 |
| Danbury, CT | Seaman Mechanical Services Inc. | BF593B6656 | Apprenticeship Sponsor | Jun 30, 2025 |
| Norwalk, CT | Seaport Electric, Inc. | 0386F44BE0 | Apprenticeship Sponsor | Jun 30, 2022 |
| Cromwell, CT | Sebastian Electric | 4F023E3A72 | Apprenticeship Sponsor | Jun 30, 2006 |
| Bethel, CT | Secure Alarm Installations LLC | F3CEE79DE9 | Apprenticeship Sponsor | Jun 30, 2012 |
| Southington, CT | Security 101 Holdings DBA: Security 101 | F367479892 | Apprenticeship Sponsor | Jun 30, 2027 |
| Middletown, CT | Security Plus North East | 2B15ED0C70 | Apprenticeship Sponsor | Jun 30, 2013 |
| Shelton, CT | Security Services, Inc. | 9DDA7A4285 | Apprenticeship Sponsor | Jun 30, 2007 |
| Norwalk, CT | SECURITY SOLUTIONS INC. | CDFB115865 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Milford, CT | Segerair LLC | 59CCDE819E | Apprenticeship Sponsor | Jun 30, 2016 |
| New Milford, CT | Seguin Heating & Air Conditioning, Inc. | 6427AD8C38 | Apprenticeship Sponsor | Jun 30, 2010 |
| Waterbury, CT | Seidel Group | 51ABFAD628 | Apprenticeship Sponsor | — |
| Waterbury, CT | Seidel, Inc. | 80870E097B | Apprenticeship Sponsor | Jun 30, 2025 |
| Northampton, MA | SEIU EDUCATION AND SUPPORT FUND FAMILY CHILDCARE | 06E28242B4 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | Select Energy Contracting Inc. | 5D6AAB5605 | Apprenticeship Sponsor | Jun 30, 2006 |
| Southington, CT | SELECT MECHANICAL SERVICES, INC. | 8D7D9C2CEF | Apprenticeship Sponsor | Jun 30, 2027 |
| Wolcott, CT | Selectcom Mfg Co., Inc. | A5D610D450 | Apprenticeship Sponsor | — |
| New Britain, CT | Semac Electric Contractors, Inc. | 36FC8C631B | Apprenticeship Sponsor | Jun 30, 2018 |
| Middletown, CT | Semmy's Barbershop | 0958005980 | Apprenticeship Sponsor | Jun 30, 2023 |
| Derby, CT | SENSIBLE HEATING & AIR CONDITIONING, LLC DBA / ONE HOUR HEATING & AIR CONDITIONING | C4E6722C64 | Apprenticeship Sponsor | Jun 30, 2024 |
| Wolcott, CT | Sequel Special Products, LLC | A42CC8E2AC | Apprenticeship Sponsor | Jun 30, 2017 |
| Thompson, CT | SEREMET ELECTRIC LLC | 04B8755D67 | Apprenticeship Sponsor | Jun 30, 2026 |
| Wilton, CT | Servco Oil Inc. | 06D01D260E | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Stamford, CT | Servcon LLC | 8961734006 | Apprenticeship Sponsor | Jun 30, 2021 |
| Meriden, CT | Service Maintenance Company, Inc. | F66B1137B3 | Apprenticeship Sponsor | Jun 30, 2023 |
| Litchfield, CT | Service Plumbing & Heating Co. | FBA9FAEF45 | Apprenticeship Sponsor | Jun 30, 2005 |
| Canterbury, CT | Service Plus Plumbing & Heating | 62D85AF848 | Apprenticeship Sponsor | Jun 30, 2007 |
| Manchester, CT | Service Relief, LLC | 897F12EDD9 | Apprenticeship Sponsor | Jun 30, 2027 |
| Danbury, CT | Service Stars, Inc. | 2DDD515913 | Apprenticeship Sponsor | Jun 30, 2027 |
| North Franklin, CT | SERVICE STATION EQUIPMENT INC | D1F074B60B | Major Contractor + 3 more | Jun 30, 2027 |
| Middletown, CT | Servotech, Inc. | 5BC9C58741 | Apprenticeship Sponsor | — |
| Hartford, CT | Servus Management Corp. | 548E165B7C | Apprenticeship Sponsor | Jun 30, 2010 |
| Farmington, CT | SETPOINT REFRIGERATION LLC | 9D35E6582C | Apprenticeship Sponsor | Jun 30, 2027 |
| Billerica, MA | Setronics Corp. | 5402F5CB60 | Apprenticeship Sponsor | Jun 30, 2024 |
| Seymour, CT | SEYMOUR OIL CO LLC (THE) SEYMOUR OIL AND PROPANE | BD2305200A | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Monroe, CT | Seymour-Sheridan, Inc. | 159D0AEDBA | Apprenticeship Sponsor | Jun 30, 2025 |
| Bloomfield, CT | SGH Electrical Services, LLC | B50770AA74 | Apprenticeship Sponsor | Jun 30, 2015 |
| Granby, CT | SHAFFER BEACON MECHANICAL LLC | 90CB3824FF | Operator of Weighing & Measuring Devices + 3 more | Jul 31, 2027 |
| Colchester, CT | Shamrock Sheet Metal, LLC | B9BC6F6E39 | Apprenticeship Sponsor | Jun 30, 2010 |
| Huntington, CT | Shanahan Plumbing LLC | CB906F729B | Apprenticeship Sponsor | Jun 30, 2023 |
| Stratford, CT | Shannon Irrigation and Landscape Lighting LLC | 187CC2610D | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Salisbury, CT | Sharon Electric Company LLC | CF9D67467F | Apprenticeship Sponsor | Jun 30, 2027 |
| Jewett City, CT | Sharp Image Barbershop | 2F161A9FDD | Apprenticeship Sponsor | Jun 30, 2027 |
| Meriden, CT | Sharp mechanical | E5EA05E8AB | Apprenticeship Sponsor | Jun 30, 2027 |
| Ellington, CT | Shaw's Pump Company, Inc. | AD10FEB7E2 | Apprenticeship Sponsor | Jun 30, 2012 |
| Manchester, CT | Shawmut Equipment Company Inc. | CD408439E6 | Apprenticeship Sponsor | Jun 30, 2014 |
| Tolland, CT | Shea's Electrical, Inc. | D6142B6A68 | Apprenticeship Sponsor | Jun 30, 2027 |
| Ledyard, CT | Shears & Gears Barbershop | C57DD0EC2B | Apprenticeship Sponsor | Jun 30, 2021 |
| Brewster, NY | Sheet Metal Workers Local Union #38 | 850A9CE995 | Apprenticeship Sponsor | Jun 30, 2027 |
| Rocky Hill, CT | Sheet Metal Workers Local Union #40 JATC | 46031E7DE7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Plainville, CT | Sheetmetal Plus Heating & Cooling, LLC | D9EBB19C93 | Apprenticeship Sponsor | Jun 30, 2014 |
| Glastonbury, CT | Sheetmetal Works, Inc. | FF0096C909 | Apprenticeship Sponsor | Jun 30, 2012 |
| Prospect, CT | Sheldon Precision, LLC | 16B8A156EE | Apprenticeship Sponsor | Jun 30, 2022 |
| Shelton, CT | Shelton Oil & Heating LLC | 0C5D43B812 | Apprenticeship Sponsor | Jun 30, 2008 |
| Washington Depot, CT | Shepaug Valley Electric LLC | C0680366EB | Apprenticeship Sponsor | Jun 30, 2013 |
| New London, CT | Shetucket Plumbing & Heating, LLC | 3ECC487D6A | Apprenticeship Sponsor | — |
| Oakville, CT | SHH Electric | 014871AE93 | Apprenticeship Sponsor | Jun 30, 2017 |
| Thompson, CT | Shippee Electric | DD26DEA81A | Apprenticeship Sponsor | Jun 30, 2026 |
| Danbury, CT | Shock Electrical Contractors, Inc. | 0A3FDB75F3 | Apprenticeship Sponsor | Jun 30, 2027 |
| East Hampton, CT | Shockwave Electric | 0EEC078A39 | Apprenticeship Sponsor | Jun 30, 2027 |
| Danbury, CT | SHOOK'S OIL BURNER SERVICE & FUEL OIL INC | 613ED851F1 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| North Stonington, CT | Shore Power Electrical Contractors, LLC | 0902991842 | Apprenticeship Sponsor | Jun 30, 2017 |
| Clinton, CT | Shoreline Electric | 51A38EDBBA | Apprenticeship Sponsor | Jun 30, 2013 |
| East Haven, CT | Shoreline Electrical Contracting, LLC | C8709573DA | Apprenticeship Sponsor | Jun 30, 2027 |
| Canterbury, CT | Shoreline Enterprises LLC | 3E60D2DD6D | Apprenticeship Sponsor | Jun 30, 2006 |
| Branford, CT | Shoreline Glass & Aluminum, LLC | 3999F6FB0B | Apprenticeship Sponsor | Jun 30, 2027 |
| West Haven, CT | Shoreline Heating & Cooling, Inc. | CFF70EE1B2 | Apprenticeship Sponsor | Jun 30, 2011 |
| Centerbrook, CT | Shoreline Heating Services | 158DA29296 | Apprenticeship Sponsor | Jun 30, 2010 |
| Westerly, RI | Shoreline Lawn Sprinklers | F52A540632 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | Shoreline Mechanical, LLC | C0C7883DCB | Apprenticeship Sponsor | Jun 30, 2020 |
| East Haven, CT | Shoreline Metal Services, LLC | 195907A4BE | Apprenticeship Sponsor | Jun 30, 2014 |
| Clinton, CT | Shoreline Plumbing & Heating LLC | D1C47CBEF8 | Apprenticeship Sponsor | Jun 30, 2027 |
| Torrington, CT | SHW Casting Technologies inc. | F17E1B2A03 | Apprenticeship Sponsor | Jun 30, 2006 |
| South Lyme, CT | Sicuranza Electric LLC | 4DEBEB94BE | Apprenticeship Sponsor | Jun 30, 2021 |
| Warren, CT | Siddall Heating & Cooling By Design | 9B5D8F4095 | Apprenticeship Sponsor | Jun 30, 2027 |
| Cromwell, CT | SIEMENS INDUSTRY INC | 7FB42F28BE | Major Contractor + 1 more | Jun 30, 2027 |
| Middletown, CT | Siena Electric LLC | FC27D817EA | Apprenticeship Sponsor | Jun 30, 2017 |
| Danbury, CT | Sierra Consulting, LLC | 470CDE63EC | Apprenticeship Sponsor | Jun 30, 2021 |
| Somers, CT | Sierra Electric, LLC | 86EEDEA2CF | Apprenticeship Sponsor | Jun 30, 2009 |
| Seymour, CT | Signature Electric LLC | 0D1650D324 | Apprenticeship Sponsor | Jun 30, 2026 |
| Preston, CT | Signature Property Services, LLC | 0DBAA292CD | Apprenticeship Sponsor | Jun 30, 2027 |
| New Britain, CT | Signature Shine CWS, LLC. | F26F15FF8F | Apprenticeship Sponsor | Jun 30, 2026 |
| Wilton, CT | Sila Services | 923ACC6076 | Apprenticeship Sponsor | Jun 30, 2027 |
| Bethel, CT | SILENT WATCHMAN SECURITY SERVICES | B57D355783 | Apprenticeship Sponsor | Jun 30, 2027 |
| Watertown, CT | Silgan Aluminum Solutions | D2E7CCE97B | Apprenticeship Sponsor | Jun 30, 2023 |
| Thomaston, CT | Silgan Dispensing | 2254EC303B | Apprenticeship Sponsor | Jun 30, 2025 |
| Norwalk, CT | Silk Plumbing & Heating | DDF4BD69CD | Apprenticeship Sponsor | Jun 30, 2025 |
| Wallingford, CT | Silver City Electric, LLC | 8EC54C930D | Apprenticeship Sponsor | Jun 30, 2023 |
| Meriden, CT | Silver City Furnace Company | 3A011C67CE | Apprenticeship Sponsor | Jun 30, 2015 |
| Old Saybrook, CT | Silverio Mechanical, LLC | A75F625CA2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Pawcatuck, CT | Simmons HVAC | 64827B32A5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Oxford, CT | Simon Electric, LLC | 75997755EB | Apprenticeship Sponsor | Jun 30, 2027 |
| East Hampton, CT | Simonow Electric | 96069F184E | Apprenticeship Sponsor | Jun 30, 2018 |
| Bridgeport, CT | Simply Electric, LLC | FD0BBA7889 | Apprenticeship Sponsor | Jun 30, 2027 |
| Darien, CT | Simpson Plumbing, LLC | F4E73C7147 | Apprenticeship Sponsor | Jun 30, 2016 |
| Simsbury, CT | Simscroft-Echo Farms, Inc. | D1DD7446D2 | Apprenticeship Sponsor | Jun 30, 2012 |
| Bethel, CT | Sipperly Artesian Well Company, INC. | C13D62D9D4 | Apprenticeship Sponsor | Jun 30, 2011 |
| Monroe, CT | SIPPIN ENERGY PRODUCTS | C6F5086677 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Berlin, CT | Sirois Tool Co. Inc. | 9C3A833BEF | Apprenticeship Sponsor | Jun 30, 2026 |
| Manchester, CT | SK Mechanical LLC | A716076D1B | Apprenticeship Sponsor | Jun 30, 2027 |
| Terryville, CT | SKALP KINGS BARBER LOUNGE | 23089DBD42 | Apprenticeship Sponsor | Jun 30, 2027 |
| Old Lyme, CT | Sked Electric, LLC | 0875F18828 | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Danbury, CT | Skidmore Electric | 54F5D626F7 | Apprenticeship Sponsor | Jun 30, 2006 |
| South Windsor, CT | Skillcraft Machine Tool Co., Inc. | 106508DAB7 | Apprenticeship Sponsor | Jun 30, 2027 |
| Windsor Locks, CT | Skips Early Bird Barber Shop | 2B1E3001B4 | Apprenticeship Sponsor | Jun 30, 2026 |
| Waterbury, CT | SKOATAK MECHANICAL LLC | 58C578089B | Apprenticeship Sponsor | Jun 30, 2025 |
| Easthampton, MA | Skor Electric, LLC | F2B685A528 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Haven, CT | Skull and Combs Company LLC | 2930F1E57C | Apprenticeship Sponsor | Jun 30, 2027 |
| Norwalk, CT | Skull and Combs Company, LLC | 0D77C3E59C | Apprenticeship Sponsor | Jun 30, 2023 |
| Farmington, CT | Sky Electric, LLC | 07D66325CF | Apprenticeship Sponsor | Jun 30, 2027 |
| Wolcott, CT | Skye Mechanical | FF1CE9B052 | Apprenticeship Sponsor | Jun 30, 2024 |
| Wallingford, CT | SKYLINE SOLAR, LLC | 5F17B3F024 | Apprenticeship Sponsor | Jun 30, 2026 |
| Prospect, CT | Sloss Electrical Contracting LLC | 61B87C5CF2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Waterford, CT | SLS Heating LLC | D77322A1BE | Apprenticeship Sponsor | Jun 30, 2022 |
| Glastonbury, CT | SM Mechanical Services, LLC | EEA3B66ABC | Apprenticeship Sponsor | Jun 30, 2027 |
| Old Lyme, CT | Small Town Electric, LLC | 1513FF6637 | Apprenticeship Sponsor | Jun 30, 2020 |
| Terryville, CT | Small Town Plumbing, LLC | E0A5B74961 | Apprenticeship Sponsor | Jun 30, 2015 |
| Storrs, CT | Smart Connections, LLC | 6DEDEC889F | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Trumbull, CT | Smart Electrical Solutions, LLC | 7B752CC2E4 | Apprenticeship Sponsor | Jun 30, 2027 |
| Pawcatuck, CT | Smart Thermal Solutions LLC | A2C3AFC3AC | Apprenticeship Sponsor | Jun 30, 2027 |
| Bridgeport, CT | Smartcut, LLC | 74DC415DA2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Torrington, CT | SMEDICK HEATING, A/C & REFRIGERATION | 9D541FA63D | Apprenticeship Sponsor | Jun 30, 2011 |
| Norwalk, CT | Smeriglio Electric, LLC | 17D9082FF5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Shelton, CT | SMG Corporate Services | 27EB3E87E5 | Apprenticeship Sponsor | Jun 30, 2026 |
| Stratford, CT | Smith Electric, LLC | A2919D7FE9 | Apprenticeship Sponsor | Jun 30, 2024 |
| Danielson, CT | Smith Plumbing & Heating | AA023FEC6F | Apprenticeship Sponsor | Jun 30, 2008 |
| Mystic, CT | SMITH PLUMBING, LLC | 2CF289970D | Apprenticeship Sponsor | — |
| Southington, CT | Smiths Medical ASD, Inc. | 067FEC2F5F | Apprenticeship Sponsor | Jun 30, 2022 |
| Fairfax, VA | Smoothstack, Inc. | 84A0AB8C29 | Apprenticeship Sponsor | Jun 30, 2022 |
| Bolton, CT | SMR Heating & Cooling | 735C4EAE9C | Apprenticeship Sponsor | Jun 30, 2027 |
| East Granby, CT | SNE Building Systems Inc. | 4120F0264C | Apprenticeship Sponsor | Jun 30, 2026 |
| Southington, CT | SNIP ITS BELLILLO LLC | B0EBD1025E | Apprenticeship Sponsor | Jun 30, 2026 |
| Stonington, CT | SNS Electric LLC | D763FFC03B | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | Socci Plumbing, LLC | 0575F813DC | Apprenticeship Sponsor | Jun 30, 2018 |
| Moodus, CT | SOCO ELECTRIC LLC | EBA899898D | Apprenticeship Sponsor | Jun 30, 2027 |
| Newington, CT | Soda Service & Alpine Refrigeration | 9CDE007E9A | Apprenticeship Sponsor | Jun 30, 2027 |
| Sandy Hook, CT | Soderquist Plumbing & Heating | D24EBD8D77 | Apprenticeship Sponsor | Jun 30, 2026 |
| Rockville, CT | Sol Cantor Electric, Inc. | C97D39812C | Apprenticeship Sponsor | Jun 30, 2004 |
| Killingworth, CT | Solar Electric LLC | C3ACF6B983 | Apprenticeship Sponsor | Jun 30, 2011 |
| Waterbury, CT | Solarize Home Energy, LLC | B12CB8068D | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Shelton, CT | SOLID TECHNOLOGY, LLC | 219154E255 | Apprenticeship Sponsor | Jun 30, 2027 |
| Watertown, CT | Solla Eyelet Products, Inc. | 6C54120DBF | Apprenticeship Sponsor | Jun 30, 2024 |
| Waterbury, CT | Solla Heating, LLC | 681CBD0B82 | Apprenticeship Sponsor | Jun 30, 2025 |
| Waterbury, CT | Solla's Heating & Cooling Inc | 656377FB9E | Apprenticeship Sponsor | Jun 30, 2027 |
| Newington, CT | Solo Mechanical Maintenance, Inc. | F6C7F978B2 | Apprenticeship Sponsor | Jun 30, 2016 |
| Milford, CT | Soloman Electric | 601FB51326 | Apprenticeship Sponsor | Jun 30, 2012 |
| Plainville, CT | Solvit, LLC | 77F41DD89E | Apprenticeship Sponsor | Jun 30, 2024 |
| Middletown, CT | Somerset Plastics Company, Inc. | 573E17D1D7 | Apprenticeship Sponsor | — |
| Newtown, CT | Sonics & Materials, Inc. | DA013ACCFF | Apprenticeship Sponsor | Jun 30, 2027 |
| Milford, CT | SONITEK CORPORATION | 971912CA14 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stamford, CT | Sonitrol Management Corporation | 9752F0DD9F | Apprenticeship Sponsor | Jun 30, 2009 |
| Stratford, CT | SONITROL SECURITY SYSTEMS OF BRIDGEPORT | DF9DF67F5B | Apprenticeship Sponsor | Jun 30, 2027 |
| Norwalk, CT | Sono Electric, LLC | 0EBE2ED002 | Apprenticeship Sponsor | Jun 30, 2017 |
| Plainfield, CT | Soucier Electric, LLC | 463B0DE719 | Apprenticeship Sponsor | Jun 30, 2023 |
| Canton, CT | Sound Electric, LLC | 639B764FE0 | Apprenticeship Sponsor | Jun 30, 2006 |
| Bethel, CT | Sound Electrical Services | 00DA9A684D | Apprenticeship Sponsor | Jun 30, 2007 |
| Norwalk, CT | Sound Electrical Services, LLC | A390365957 | Apprenticeship Sponsor | Jun 30, 2016 |
| Darien, CT | SOUND ENERGY CORP | FBFEAF2A60 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Old Saybrook, CT | Sound Manufacturing, Inc. | 6169407901 | Apprenticeship Sponsor | Jun 30, 2020 |
| Vernon, CT | Sound Mechanical Contractors, LLC | 0B25E226E3 | Apprenticeship Sponsor | Jun 30, 2024 |
| Torrington, CT | Soundworks & Security LLC | FDBF1523AD | Apprenticeship Sponsor + 1 more | Jun 30, 2027 |
| Kent, CT | South 7 Electric, LLC | F01A88F96D | Apprenticeship Sponsor | Jun 30, 2027 |
| South Britain, CT | South Britain Oil, LLC | EBEB98A3DA | Apprenticeship Sponsor | Jun 30, 2020 |
| Plantsville, CT | South End Electrical Contractors, LLC | 1E613A11A3 | Apprenticeship Sponsor | Jun 30, 2009 |
| Stafford, CT | South Paw Electric, LLC | 4E3474E369 | Apprenticeship Sponsor | Jun 30, 2016 |
| Pawcatuck, CT | South Shore Heating & Cooling, Inc. | C3093E714E | Apprenticeship Sponsor | Jun 30, 2027 |
| Southbury, CT | Southbury Electrical Contractors, LLC | E59D9E69BF | Apprenticeship Sponsor | Jun 30, 2027 |
| Mystic, CT | Southeast Electric, LLC | 9A8513BF72 | Apprenticeship Sponsor | Jun 30, 2027 |
| North Haven, CT | SOUTHERN DISTRICT ROOFERS JATC LOCAL 12 | E3E4B959E6 | Apprenticeship Sponsor | Jun 30, 2027 |
| Hartford, CT | Southern Electric, Inc. | CE29B2BE26 | Apprenticeship Sponsor | Jun 30, 2019 |
| Plantsville, CT | Southington Plumbing & Heating | 379FA8BE69 | Apprenticeship Sponsor | Jun 30, 2012 |
| Plantsville, CT | Southington Tool & Manufacturing Corp. | 20F30A4836 | Apprenticeship Sponsor | Jun 30, 2027 |
| Torrington, CT | Southwest Mold, Inc., dba APTYX | ED4A651C47 | Apprenticeship Sponsor | Jun 30, 2027 |
| Meriden, CT | Southwick & Meister, Inc. | 99434CE08F | Apprenticeship Sponsor | Jun 30, 2004 |
| Bristol, CT | Soyka Sheetmetal, LLC | D59B5CC16F | Apprenticeship Sponsor | Jun 30, 2025 |
| Guilford, CT | Spadacenta Electric, LLC | EB98B72877 | Apprenticeship Sponsor | Jun 30, 2016 |
| Burlington, CT | Spargo Plumbing & Heating, Inc. | 91CA38C36B | Apprenticeship Sponsor | Jun 30, 2027 |
| Ansonia, CT | Spectrum Plastics Group Inc. | 34B9CC670D | Apprenticeship Sponsor | Jun 30, 2013 |
| Meriden, CT | Spectrum Services Co., The | 197F6DE1D7 | Apprenticeship Sponsor | Jun 30, 2010 |
| Old Lyme, CT | Speirs Plumbing, Inc. | 9249C40BC9 | Apprenticeship Sponsor | Jun 30, 2027 |
| Granby, CT | Spence Well Drilling | 544CBFB629 | Apprenticeship Sponsor | Jun 30, 2027 |
| Danbury, CT | Sperry Electric, LLC | 81CB9D116C | Apprenticeship Sponsor | Jun 30, 2019 |
| Naugatuck, CT | Sphinx Electric, LLC | 8BBCE578F4 | Apprenticeship Sponsor | Jun 30, 2020 |
| Groton, CT | SPICER PLUS INC | 72DAD219E8 | Operator of Weighing & Measuring Devices + 1 more | Jul 31, 2027 |
| Colchester, CT | Spicer Sheetmetal & Contracting LLC | DE4DA805DF | Apprenticeship Sponsor | Jun 30, 2025 |
| Hartford, CT | Spinella Electric | 975675C8D3 | Apprenticeship Sponsor | Jun 30, 2015 |
| Danielson, CT | SPIROL International Corp. | 20C9A8AE5C | Apprenticeship Sponsor | Jun 30, 2021 |
| West Haven, CT | SPJB Enterprises, Inc. DBA: Airway Electric Company | 422585D7B9 | Apprenticeship Sponsor | Jun 30, 2021 |
| Manchester, CT | Sports Barber Shop dba Carmel Santiago | 199677F8DA | Apprenticeship Sponsor | Jun 30, 2024 |
| Sprague, CT | Sprague Heating and Cooling | 93631CB2D9 | Apprenticeship Sponsor | Jun 30, 2027 |
| New Britain, CT | Spring Brook Service, Inc. | AF8B5F843C | Apprenticeship Sponsor | Jun 30, 2027 |
| Bristol, CT | Springfield Spring Corp. | B3E0F33969 | Apprenticeship Sponsor | Jun 30, 2021 |
| Columbia, MD | Sprinkler Fitters JATC of CT, RI & Western MA Local 669 | D0D5829158 | Apprenticeship Sponsor | Jun 30, 2027 |
| Cromwell, CT | SPS Plumbing, Heating & Drain, LLC | FC2C6978A0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Coventry, CT | SPW Electric, LLC | 334623E41D | Apprenticeship Sponsor | Jun 30, 2027 |
| Bloomfield, CT | SRS Petroleum Services | 0959CC3FDC | Apprenticeship Sponsor | Jun 30, 2027 |
| Raynham, MA | SS Service Corp. | 4BBE31AC57 | Apprenticeship Sponsor | Jun 30, 2027 |
| Broad Brook, CT | SSM II Inc dba Stauffer Sheet Metal | 1EBBDEF31F | Apprenticeship Sponsor | Jun 30, 2027 |
| Rocky Hill, CT | SSSH3, INC. DBA ALARM NEW ENGLAND | 786AAB6988 | Apprenticeship Sponsor | Jun 30, 2027 |
| Hartford, CT | St. Francis Hospital & Medical Center | B0E17D48F1 | Apprenticeship Sponsor + 1 more | Jun 30, 2021 |
| Woodbury, CT | St. Pierre Oil Co. Inc. | E213D1DF89 | Apprenticeship Sponsor | Jun 30, 2022 |
| Tolland, CT | Stafford Electrical, Inc. | 088BDB4625 | Apprenticeship Sponsor | Jun 30, 2022 |
| Stafford Springs, CT | STAFFORD MECHANICAL SERVICES, | 81E8405FF2 | Apprenticeship Sponsor | Jun 30, 2027 |
| Seymour, CT | Stahl Electrical Services, LLC | 8C12FBAC2F | Apprenticeship Sponsor | Jun 30, 2027 |
| Plainfield, CT | STAK’D Mechanical LLC | 129385F67C | Apprenticeship Sponsor | Jun 30, 2027 |
| Huntington, CT | Stamford Electric, Inc. | 4F25067E6B | Apprenticeship Sponsor | Jun 30, 2008 |
| Greenwich, CT | Stamford Electrical Emergencies LLC | 43295D6516 | Apprenticeship Sponsor | Jun 30, 2012 |
| Stamford, CT | STAMFORD HOSPITAL, THE | 1A44320DB7 | General Hospital + 2 more | Jun 30, 2027 |
| Stamford, CT | Stamford Water Pollution Central Authority | 1AF9B0FCBD | Apprenticeship Sponsor | Jun 30, 2009 |
| Bridgeport, CT | Standard Oil of CT | 560F7049FF | Apprenticeship Sponsor | Jun 30, 2027 |
| New London, CT | Standard Sprinkler Corp. | F4B3D72B07 | Apprenticeship Sponsor | Jun 30, 2011 |
| Norwich, CT | Standish Heating & Air Conditioning, Inc. | CE60AA7ABB | Apprenticeship Sponsor | Jun 30, 2009 |
| Waterbury, CT | Stango Electric | B39640ED06 | Apprenticeship Sponsor | Jun 30, 2009 |
| Seymour, CT | Stanley Convergent Security Solutions, Inc. | C132F62F41 | Apprenticeship Sponsor | Jun 30, 2022 |
| Danbury, CT | Stanley Engineered Fastening | 4629B881A5 | Apprenticeship Sponsor | Jun 30, 2026 |
| Hartford, CT | STANLEY WIESEN INC SWI GLASS & METAL | FD26C06290 | Major Contractor + 2 more | Jun 30, 2027 |
| Waterbury, CT | Star Plumbing & Heating Company | 1B3C62F931 | Apprenticeship Sponsor | Jun 30, 2011 |
| Huntington, CT | Starcom Systems | C16806ED32 | Apprenticeship Sponsor | Jun 30, 2027 |
| Colchester, CT | Staron Plumbing & Heating | 375EFF22C4 | Apprenticeship Sponsor | Jun 30, 2026 |
| North Windham, CT | Starr Electric, LLC | 9415CCE9F3 | Apprenticeship Sponsor | Jun 30, 2027 |
| Granby, CT | STATE LINE OIL | E16B1C3B2A | Motor Fuel Quality Registration + 3 more | Oct 31, 2027 |
| Granby, CT | STATE LINE PROPANE LLC | 0D6E7369BF | Home Heating Fuel Dealer + 1 more | Sep 30, 2027 |
| Newington, CT | State Of CT For CTDOT & CT E.U.I Connecticut Employees Union Independent | 8C09AE48B7 | Apprenticeship Sponsor | Jun 30, 2026 |
| Glastonbury, CT | State-Wide Electric, Inc. | 3918D403D1 | Apprenticeship Sponsor | Jun 30, 2027 |
| Naugatuck, CT | STATELY STAIR CO INC | 5F400295E7 | New Home Construction Contractor + 2 more | Mar 31, 2027 |
| East Haven, CT | Statewide Plumbing & Heating | FA9983FFD6 | Apprenticeship Sponsor | Jun 30, 2016 |
| Salisbury, CT | Staub Electric, Inc. | 1095B08D67 | Apprenticeship Sponsor | Jun 30, 2011 |
| Broadbrook, CT | STAUFFER SHEET METAL, LLC | DF2CD55AA7 | Apprenticeship Sponsor | Jun 30, 2026 |
| Willington, CT | Stavens Brothers Inc. | E4193E606F | Apprenticeship Sponsor | Jun 30, 2025 |
| Glastonbury, CT | Stavrou Mechanical | 06DA732214 | Apprenticeship Sponsor | Jun 30, 2009 |
| West Hartford, CT | Steben's Auto Glass Company | 50BF1F6791 | Apprenticeship Sponsor | Jun 30, 2010 |
| Bridgeport, CT | Steck Electric Co. Inc. | 432A9C555D | Apprenticeship Sponsor | Jun 30, 2004 |
| Bridgeport, CT | Steck Electric Company, Inc. | F8244D4624 | Apprenticeship Sponsor | Jun 30, 2009 |
| Trumbull, CT | Steerco, LLC | F44C018F8E | Apprenticeship Sponsor | Jun 30, 2009 |
| Ansonia, CT | Stelray Plastic Products, Inc. | 39BFA881C8 | Apprenticeship Sponsor | Jun 30, 2027 |
| Greenwich, CT | Stephansen Brothers Electrical Corp. | 2FD98D279B | Apprenticeship Sponsor | Jun 30, 2006 |
| Stamford, CT | Stephen D. Blazey, Jr. Plumbing, Heating & Wells LLC | B0218F08E8 | Apprenticeship Sponsor | Jun 30, 2011 |
| Norwalk, CT | Stephen Miller Plumbing&Heating Inc. | BA84F60337 | Apprenticeship Sponsor | Jun 30, 2007 |
| Bridgeport, CT | Stephen's HVAC, Inc. | 375E707FD5 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stratford, CT | STERLING | 99DA054690 | Apprenticeship Sponsor | Jun 30, 2026 |
| Riverside, CT | Sterling Electric, LLC | DDEC1BB551 | Apprenticeship Sponsor | Jun 30, 2024 |
| Moosup, CT | STERLING OIL LLC | FB64196882 | Home Heating Fuel Dealer + 2 more | Sep 30, 2027 |
| Waterbury, CT | Sterling Security Systems, Inc. | 96864947DD | Apprenticeship Sponsor | Jun 30, 2027 |
| Winsted, CT | Sterling Sintered Technologies, Inc. | 376CD53EC3 | Apprenticeship Sponsor | Jun 30, 2022 |
| Enfield, CT | Steve Clavette Electric, LLC | 6F3C952363 | Apprenticeship Sponsor | Jun 30, 2021 |
| Naugatuck, CT | STEVE'S ELECTRICAL CONTRACTING | 7EF2F9CF34 | Apprenticeship Sponsor | Jun 30, 2027 |
| Seymour, CT | Steve's Plumbing & Heating Services LLC | F68131AA1E | Apprenticeship Sponsor | Jun 30, 2019 |
| Bradford, RI | Steven A Dubois, Inc. dba: Oceanside Plumbing & Heating | 48DB280C55 | Apprenticeship Sponsor | Jun 30, 2020 |
| Old Saybrook, CT | Stevens Communications, Inc. | 4F4831CA42 | Apprenticeship Sponsor | Jun 30, 2014 |
| Thomaston, CT | Stevens Company, Inc. | B98FB7A566 | Apprenticeship Sponsor | Jun 30, 2027 |
| Glastonbury, CT | Stevens Duct Installation | 43067C7336 | Apprenticeship Sponsor | Jun 30, 2014 |
| Granby, CT | Stevens Electrical Company, LLC | 1F158CA105 | Apprenticeship Sponsor | Jun 30, 2016 |
| Orange, CT | Steves plumbing llc | 436E2F2CA0 | Apprenticeship Sponsor | Jun 30, 2027 |
| Thomaston, CT | STEWART EFI CT, LLC | E888E47EC6 | Apprenticeship Sponsor | Jun 30, 2027 |
| Waterbury, CT | Stewart Mechanical Services, Inc. | 1F05A16F88 | Apprenticeship Sponsor | Jun 30, 2021 |
| Bloomfield, CT | Stewart's Barbershop | C80B475345 | Apprenticeship Sponsor | Jun 30, 2026 |
| Middletown, CT | STIELAU OIL CO INC | 82335AF82C | Home Heating Fuel Dealer + 1 more | Sep 30, 2026 |
| Waterbury, CT | Stolfi Electric Co., Inc. | 975DC977DD | Apprenticeship Sponsor | Jun 30, 2008 |
| Broadbrook, CT | Stolinas Plumbing & Heating, LLC | 9E29D8E57C | Apprenticeship Sponsor | Jun 30, 2023 |
| Glastonbury, CT | Strand Salon, LLC | FD22E2A445 | Apprenticeship Sponsor | Jun 30, 2026 |
| Stratford, CT | STRATFORD ELECTRIC SERVICES, LLC | 36FFF621DC | Apprenticeship Sponsor | Jun 30, 2027 |
| Stratford, CT | Stratford Pipe & Engineering Co., Inc. | 4F141722B5 | Apprenticeship Sponsor | Jun 30, 2008 |
| Southbury, CT | Stratford Plumbing & Heating Inc. | 5B71094DE9 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stratford, CT | Strathmoor Electric, Inc. | C830EA2730 | Apprenticeship Sponsor | Jun 30, 2027 |
| Stratford, CT | Straton Industries, Inc. | 8D7D11773A | Apprenticeship Sponsor | Jun 30, 2027 |
| New Milford, CT | Straub Plumbing Inc. | 935AC8BDF8 | Apprenticeship Sponsor | Jun 30, 2012 |
| Marlborough, CT | Streamline Electric, LLC | FE9279E5ED | Apprenticeship Sponsor | Jun 30, 2024 |
| Cheshire, CT | STRUCTURAL PRESERVATION SYSTEMS LLC | 754E43729C | Major Contractor + 1 more | Jun 30, 2027 |
| Litchfield, CT | Strumpf Electric | ED4BA55D33 | Apprenticeship Sponsor | Jun 30, 2026 |
| Milford, CT | Stuart L. White Co. | 6701380497 | Apprenticeship Sponsor | Jun 30, 2027 |
| Norwich, CT | Stula Enterprises, LLC | 344BCF44EA | Apprenticeship Sponsor | Jun 30, 2027 |
| Monroe, CT | Suburban Electrical Contractors Inc. | 9BE8E0F7D2 | Apprenticeship Sponsor | Jun 30, 2013 |
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.