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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Caileen Simonds | Southwick, MA | — | Designer | 15184 |
| Caitlin Coumounduros | Boston, MA | — | Designer | 15168 |
| Caitlin Nover | Orange, MA | — | Designer | 14148 |
| Caleb Paus | Brewster, MA | — | DesignerInspector | 13728 |
| Calvin S. Joseph | Providence, RI | — | Designer | 14280 |
| Cameron Cabral | Foxboro, MA | — | Designer | 14834 |
| Cameron Farrah | — | — | Inspector | 14542 |
| Cameron Gray | — | — | Inspector | 14694 |
| Cameron Shamey | Foxboro, MA | — | Designer | 14838 |
| Cameron Turner | — | — | Inspector | 15054 |
| Camille Beckett | Mansfield, MA | — | DesignerInspector | 14990 |
| Camille Griffin | Upton, MA | — | DesignerInspector | 14355 |
| Camrie Baams | South Dennis, MA | — | Designer | 14957 |
| Cara Olejarz | Ayer, MA | — | Designer | 14762 |
| Carl Hultgren | Charlton, MA | — | Designer | 2689 |
| Carl J. Balduf | Plainville, MA | — | Designer | 71 |
| Carl Nelke | Conway, MA | — | Designer | 3087 |
| Carlos A. Quintal | North Andover, MA | — | Designer | 1990 |
| Carlton Greenwood | — | — | Inspector | 89 |
| Carmelo Nicolosi | Mattapoisett, MA | — | Designer | 11260 |
| Carmen E. Shay | Falmouth, MA | — | Inspector | 3080 |
| Carmen E. Shay | East Falmouth, MA | — | Designer | 2209 |
| Carolina Bencosme | Lowell, MA | — | Designer | 14341 |
| Caroline P. Adamson | Boston, MA | — | DesignerInspector | 14930 |
| Carolyn J. Doyle | Hope Valley, RI | — | Designer | 617 |
| Carrie Schoener | Yarmouth, MA | — | DesignerInspector | 13970 |
| Casey Mellin | — | — | Inspector | 13383 |
| Catherine Coniaris | Woburn, MA | — | Designer | 15040 |
| Celena Richardson | Portsmouth, RI | — | DesignerInspector | 14602 |
| Chad J. Jablonski | Hill, MA | — | Inspector | 4574 |
| Chance Hartwell | — | — | Inspector | 14868 |
| Chandler McLaughlin | Kittery, ME | — | Designer | 14964 |
| Charles A. Budnick | Clinton, MA | — | Designer | 268 |
| Charles D. Kaniecki | Southhampton, MA | — | DesignerInspector | 14764 |
| Charles E. Smith Ii | — | — | Inspector | 14508 |
| Charles G. Johnson | — | — | Inspector | 4763 |
| Charles G. Johnson | Amesbury, MA | — | Designer | 1134 |
| Charles J. Kaniecki | — | — | Inspector | 119 |
| Charles J. Kaniecki | Southampton, MA | — | Designer | 1177 |
| Charles J. LaBatt | — | — | Inspector | 3757 |
| Charles J. LaBatt | Williamstown, MA | — | Designer | 1291 |
| Charles J. Roux | — | — | Inspector | 891 |
| Charles M. Parsons | Barrington, MA | — | Inspector | 584 |
| Charles M. Parsons | Great Barrington, MA | — | Designer | 1854 |
| Charles P. Hartwell | — | — | Inspector | 98 |
| Charles P. Kupfer | — | — | Inspector | 2767 |
| Charles Rowland | Centerville, MA | — | Designer | 13586 |
| Charlotte Speakman | — | — | Inspector | 14065 |
| Chloe Mawn | Upton, MA | — | Designer | 14716 |
| Chris Andrews | Nantucket, MA | — | Designer | 15110 |
| Chris Nation | — | — | Inspector | 3978 |
| Chris P. Sparages | Middleton, MA | — | Designer | 2297 |
| Chris Stanton | Marlborough, MA | — | Designer | 14267 |
| Chris Stoddard | — | — | Inspector | 14809 |
| Chris Vandenberghe | Raynham, MA | — | Designer | 14970 |
| Chris Warren | — | — | Inspector | 14578 |
| Christian A. Zahner, Iv | — | — | Inspector | 3606 |
| Christian Davenport | Yarmouth, MA | — | Inspector | 14177 |
| Christian Davis | — | — | Inspector | 14510 |
| Christian Pasichny | Marlborough, MA | — | DesignerInspector | 14933 |
| Christian Rice | Milford, MA | — | Designer | 14166 |
| Christian Zahner Iv | Norton, MA | — | Designer | 13873 |
| Christina Florence | Palmer, MA | — | DesignerInspector | 14270 |
| Christina Papadopoulos | Chelmsford, MA | — | Designer | 14037 |
| Christina Radwilowicz | Otis, MA | — | Inspector | 14942 |
| Christine Mathis | Burlington, MA | — | Designer | 13786 |
| Christopher A. Guida | Lyndeborough, NH | — | Designer | 13488 |
| Christopher Anderson | Leominster, MA | — | Designer | 14005 |
| Christopher Broyles | Beverly, MA | — | Designer | 13780 |
| Christopher C. Mossman | — | — | Inspector | 756 |
| Christopher C. Mossman | Westminster, MA | — | Designer | 1692 |
| Christopher Cantin | Framingham, MA | — | Designer | 14980 |
| Christopher Chamberland | Northampton, MA | — | Designer | 13861 |
| Christopher Coon | Granby, CT | — | Designer | 15167 |
| Christopher Craig | Natick, MA | — | Designer | 14828 |
| Christopher D. Yarworth | Center Conway, NH | — | Designer | 2652 |
| Christopher Freitas | Attleboro, MA | — | Inspector | 14937 |
| Christopher Gaboriault | — | — | Inspector | 12242 |
| Christopher Gaboriault | Holliston, MA | — | Designer | 2949 |
| Christopher Giunta | — | — | Inspector | 14856 |
| Christopher Giunta | Sudbury, MA | — | Designer | 15103 |
| Christopher Hayward | Waltham, MA | — | DesignerInspector | 14498 |
| Christopher Hodney | Boston, MA | — | Designer | 13687 |
| Christopher K. Gilbert | New Bedford, MA | — | Designer | 13795 |
| Christopher Keenan | Paxton, MA | — | Designer | 2770 |
| Christopher Knuth | — | — | Inspector | 2820 |
| Christopher Knuth | Princeton, MA | — | Designer | 1249 |
| Christopher L. Charette | Mansfield, MA | — | Designer | 365 |
| Christopher Lanoue | — | — | Inspector | 4129 |
| Christopher Lemek | — | — | Inspector | 12705 |
| Christopher Lucy | — | — | Inspector | 3864 |
| Christopher M. Garcia | — | — | Inspector | 4632 |
| Christopher M. Garcia | Dartmouth, MA | — | Designer | 832 |
| Christopher M. Gould | — | — | Inspector | 15061 |
| Christopher Marchand | — | — | Inspector | 4500 |
| Christopher McClure | — | — | Inspector | 4327 |
| Christopher McEntee | Wareham, MA | — | Designer | 14012 |
| Christopher McKernan | — | — | Inspector | 13630 |
| Christopher Merrikin | Watertown, MA | — | Designer | 15178 |
| Christopher Michaud | — | — | Inspector | 9970 |
| Christopher Michaud | Westport, MA | — | Designer | 1621 |
| Christopher N. Phillips | — | — | Inspector | 188 |
| Christopher Oberg | — | — | Inspector | 14988 |
| Christopher P. Alley | Vineyard Haven, MA | — | Designer | 18 |
| Christopher Paine | Brookfield, MA | — | Inspector | 15125 |
| Christopher R. Johnson | Walpole, MA | — | Designer | 14013 |
| Christopher Rogers | — | — | Inspector | 13061 |
| Christopher S. Dohner | Raynham, MA | — | Designer | 13706 |
| Christopher Santos | — | — | Inspector | 14989 |
| Christopher Schultz | — | — | Inspector | 14802 |
| Christopher Stoddard | Athol, MA | — | Designer | 13393 |
| Christopher Tryon | Monterey, MA | — | Designer | 13272 |
| Christopher Wickson | Brewster, MA | — | Designer | 2593 |
| Christopher York | Haverhill, MA | — | Designer | 2656 |
| Cindy A. McConarty | Falmouth, MA | — | Inspector | 4385 |
| Cindy A. McConarty | East Falmouth, MA | — | Designer | 244 |
| Claire A. Golden | — | — | Inspector | 831 |
| Claire A. Golden | Haverhill, MA | — | Designer | 900 |
| Claudia Sarti | Southampton, MA | — | DesignerInspector | 14526 |
| Clayton Mason | Marlborough, MA | — | Designer | 14832 |
| Clifford Pierre | Foxboro, MA | — | Designer | 14951 |
| Cody Coutinho | Chilmark, MA | — | Designer | 14192 |
| Cody Gibb | — | — | Inspector | 15108 |
| Cody Smith | Gloucester, MA | — | DesignerInspector | 14041 |
| Cole Modestow | Westfield, MA | — | DesignerInspector | 14922 |
| Colin McSweeney | Pembroke, MA | — | Designer | 14241 |
| Colin Sykes | Pittsfield, MA | — | Designer | 13806 |
| Colleen Fermon | — | — | Inspector | 4622 |
| Colleen Fermon | Ipswich, MA | — | Designer | 1888 |
| Colton Garelli | Holyoke, MA | — | DesignerInspector | 14813 |
| Conner Fleury | — | — | Inspector | 14467 |
| Connie Lu | Cambridge, MA | — | Designer | 14897 |
| Connor Downing | Edgartown, MA | — | DesignerInspector | 14575 |
| Connor Ennis | Westborough, MA | — | Designer | 14656 |
| Connor Galvin | Lynn, MA | — | DesignerInspector | 14941 |
| Connor Godin | Methuen, MA | — | Designer | 14899 |
| Connor Lincoln | Newbury, MA | — | Inspector | 14214 |
| Conor Nagle | — | — | Inspector | 4843 |
| Conor Nagle | Bolton, MA | — | Designer | 2838 |
| Conor Williamson | — | — | Inspector | 15134 |
| Conrad C. Nuthmann | — | — | Inspector | 3706 |
| Conrad C. Nuthmann | Lunenburg, MA | — | Designer | 1758 |
| Coral Hope | — | — | Inspector | 14626 |
| Corey Brodeur | Spencer, MA | — | Designer | 2940 |
| Corey Hartmann | Greenfield, MA | — | Designer | 15089 |
| Corey Wilson | — | — | Inspector | 683 |
| Corey Wilson | Winchendon, MA | — | Designer | 14223 |
| Cory Mason | Salem, NH | — | Designer | 14154 |
| Courtney Beckwith | Medfield, MA | — | Designer | 14236 |
| Craig D. Martin | — | — | Inspector | 14714 |
| Craig Horsfall | — | — | Inspector | 3580 |
| Craig Horsfall | Fairhaven, MA | — | Designer | 1090 |
| Craig J. Ferrari | Yarmouth Port, MA | — | Designer | 13871 |
| Craig LoPiccolo | Essex, MA | — | Designer | 14278 |
| Craig Marchionda | Georgetown, MA | — | Designer | 13892 |
| Cristian Rivera | Framingham, MA | — | Designer | 15105 |
| Crystal Dugay | Westfield, MA | — | Designer | 14742 |
| Crystal Wilkinson | — | — | Inspector | 14333 |
| Curtis J. Robinson | Augustine, FL | — | Inspector | 887 |
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