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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Gabriel Foster | Bridgewater, MA | — | Inspector | 14850 |
| Gabrielle Almeida | Westport, MA | — | DesignerInspector | 14881 |
| Gabrielle White | Rockport, MA | — | DesignerInspector | 14698 |
| Gail A. Joseph | Mattapoisett, MA | — | DesignerInspector | 14175 |
| Garett Brarmann | — | — | Inspector | 14677 |
| Garrett Horsfall | Braintree, MA | — | Designer | 13863 |
| Gary C. Menin, Sr. | Sterling, MA | — | DesignerInspector | 13555 |
| Gary D. James | — | — | Inspector | 4677 |
| Gary Flaherty | Keene, NH | — | Designer | 13259 |
| Gary H. Lynde | — | — | Inspector | 143 |
| Gary James | Pembroke, MA | — | Designer | 13765 |
| Gary P. Weiner | Hampden, MA | — | Designer | 2567 |
| Gary Russell | — | — | Inspector | 1168 |
| Gary Russell | Carver, MA | — | Designer | 2110 |
| Generoso (Joe) S. Cresta | — | — | Inspector | 14638 |
| George A. Sourati | Haven, MA | — | Inspector | 5001 |
| George A. Sourati | Vineyard Haven, MA | — | Designer | 2290 |
| George Atallah | — | — | Inspector | 14546 |
| George Atallah | Salem, NH | — | Designer | 14749 |
| George Bruedle | — | — | Inspector | 12699 |
| George Dimakarakos | — | — | Inspector | 2978 |
| George Dimakarakos | Acton, MA | — | Designer | 576 |
| George E. Smith | Shrewsbury, MA | — | Designer | 3017 |
| George Ellis M. Densmore | Harwich, MA | — | DesignerInspector | 15045 |
| George Heufelder | — | — | Inspector | 4859 |
| George Heufelder | Falmouth, MA | — | Designer | 1054 |
| George J. Saraceno | Woburn, MA | — | DesignerInspector | 13785 |
| George McGuirk | — | — | Inspector | 553 |
| George R. Collins | Braintree, MA | — | Designer | 413 |
| George Reilly | Brewster, MA | — | Designer | 2020 |
| George T. Ayoub | Fall River, MA | — | Designer | 53 |
| George W. Kellum | Rehoboth, MA | — | DesignerInspector | 12877 |
| Georgina Maende | Hadley, MA | — | Inspector | 15123 |
| Georgine Grissop | — | — | Inspector | 4653 |
| Gerald F. Bernard | — | — | Inspector | 1601 |
| Gerald F. Bernard | Berkley, MA | — | Designer | 146 |
| Gerald G. Buzanoski | Scarborough, ME | — | Designer | 286 |
| Gerald R. Pezzella | — | — | Inspector | 873 |
| Geralyn Carr | Bedford, MA | — | DesignerInspector | 14867 |
| Gerard Bergeron | — | — | Inspector | 2817 |
| Gerard Cody | Randolph, MA | — | DesignerInspector | 14909 |
| Gerardo Valentin | — | — | Inspector | 13834 |
| Gilbert Alegi | Taunton, MA | — | Designer | 13 |
| Glen E. Harrington | Mills, MA | — | Inspector | 323 |
| Glen E. Harrington | Marston Mills, MA | — | Designer | 1011 |
| Glen Nichols | — | — | Inspector | 177 |
| Glenn E. Mauk | — | — | Inspector | 1471 |
| Glenn E. Mauk | Westport, MA | — | Designer | 2900 |
| Gordon Fraser | — | — | Inspector | 15136 |
| Gordon Rogerson | Reading, MA | — | Designer | 2074 |
| Grace Melillo | South Dennis, MA | — | Designer | 14958 |
| Graham McCamley | — | — | Inspector | 14632 |
| Greg Brehm | Dennis, MA | — | Inspector | 13633 |
| Greg Hochmuth | — | — | Inspector | 4715 |
| Greg Hochmuth | Merrimac, MA | — | Designer | 2825 |
| Greg Saab | Haverhill, MA | — | Designer | 2123 |
| Gregory A. Bunavicz | Bridgewater, MA | — | Inspector | 4787 |
| Gregory A. Bunavicz | West Bridgewater, MA | — | Designer | 2712 |
| Gregory Bernard | — | — | Inspector | 4674 |
| Gregory Bernard | Danvers, MA | — | Designer | 2860 |
| Gregory Devine | Waltham, MA | — | Designer | 14056 |
| Gregory Everson | — | — | Inspector | 13750 |
| Gregory J. Morse | — | — | Inspector | 4270 |
| Gregory J. Morse | Scituate, MA | — | Designer | 2906 |
| Gregory J. Tansey | — | — | Inspector | 705 |
| Gregory J. Tansey | Rockland, MA | — | Designer | 2399 |
| Gregory M. Gardner | Deerfield, MA | — | Inspector | 1525 |
| Gregory M. St. Louis | Salem, MA | — | Designer | 12908 |
| Gregory Melnyk | Framingham, MA | — | Designer | 15030 |
| Gregory Moakley | Peabody, MA | — | Designer | 15097 |
| Gregory R. Lahaie | Bay, MA | — | Inspector | 14877 |
| Gregory Roto | Auburn, MA | — | Designer | 15093 |
| Gregory S. Nicholas | Westport, MA | — | Designer | 1738 |
| Gregory T. Stahl | — | — | Inspector | 2064 |
| Gregory Vigna | Clarksburg, MA | — | Designer | 13508 |
| Gregory W. Driscoll, Jr. | Easton, MA | — | Inspector | 12000 |
| Gregory W. Driscoll, Jr. | South Easton, MA | — | Designer | 2816 |
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