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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Dale Barrows | — | — | Inspector | 1675 |
| Dale Barrows | Rochester, MA | — | Designer | 83 |
| Dale MacKinnon | — | — | Inspector | 1390 |
| Dale MacKinnon | Natick, MA | — | Designer | 1435 |
| Damien Dmitruk | Kingston, MA | — | DesignerInspector | 14007 |
| Dan Duprez | — | — | Inspector | 13060 |
| Dana B. Junior | — | — | Inspector | 3015 |
| Dana B. Junior | Marshfield, MA | — | Designer | 1171 |
| Dana M. Altobello | Marshfield, MA | — | Designer | 2750 |
| Dana R. Clow | Hillsborough, NH | — | Designer | 404 |
| Danetza Yachachin | Haverhill, MA | — | Designer | 15044 |
| Danica Cucchi | Sharon, MA | — | DesignerInspector | 14887 |
| Daniel A. Ojala | Yarmouthport, MA | — | Designer | 1805 |
| Daniel A. Starmer | — | — | Inspector | 4368 |
| Daniel B. Johnson | Hamilton, MA | — | Inspector | 962 |
| Daniel B. Johnson | South Hamilton, MA | — | Designer | 1137 |
| Daniel B. Wolfe | Groton, MA | — | Designer | 2631 |
| Daniel Briscoe | — | — | Inspector | 4426 |
| Daniel C. Mulloy | Middleboro, MA | — | Designer | 1702 |
| Daniel C. Proctor | — | — | Inspector | 12817 |
| Daniel Campbell | — | — | Inspector | 4778 |
| Daniel Campbell | Plainville, MA | — | Designer | 2867 |
| Daniel Carr | Lunenburg, MA | — | DesignerInspector | 13801 |
| Daniel Clasby | Cambridge, MA | — | Designer | 14826 |
| Daniel E. Fournier | — | — | Inspector | 14842 |
| Daniel E. Gonsalves | Sagamore Beach, MA | — | Designer | 13587 |
| Daniel Gaylord | — | — | Inspector | 14379 |
| Daniel Hammerberg | Roslindale, MA | — | Designer | 14565 |
| Daniel Hassett | Pittsfield, MA | — | DesignerInspector | 14999 |
| Daniel Hawkins | — | — | Inspector | 14324 |
| Daniel Hazen | Brookfield, MA | — | DesignerInspector | 14348 |
| Daniel I. McCormack | — | — | Inspector | 4582 |
| Daniel I. McCormack | Cohasset, MA | — | Designer | 2832 |
| Daniel J. Coughlin | — | — | Inspector | 303 |
| Daniel J. Coughlin | Methuen, MA | — | Designer | 463 |
| Daniel Karpinski | — | — | Inspector | 14848 |
| Daniel Latini | Peterborough, NH | — | Designer | 14599 |
| Daniel M. Dulaski | — | — | Inspector | 4868 |
| Daniel M. Dulaski | Mansfield, MA | — | Designer | 641 |
| Daniel M. Smith | — | — | Inspector | 4781 |
| Daniel M. Smith | Pembroke, MA | — | Designer | 2264 |
| Daniel MacRitchie | — | — | Inspector | 13507 |
| Daniel MacRitchie | Exeter, NH | — | Designer | 1447 |
| Daniel Marinello | — | — | Inspector | 14527 |
| Daniel McIntyre | — | — | Inspector | 292 |
| Daniel McIntyre | Hopkinton, MA | — | Designer | 1562 |
| Daniel Merrikin | Millis, MA | — | Designer | 2835 |
| Daniel Ottenheimer | — | — | Inspector | 291 |
| Daniel Ottenheimer | Gloucester, MA | — | Designer | 1820 |
| Daniel P. Croteau | Harwich, MA | — | Inspector | 3772 |
| Daniel P. Croteau | South Harwich, MA | — | Designer | 481 |
| Daniel P. Mercurio | Boylston, MA | — | Inspector | 13570 |
| Daniel Regan | — | — | Inspector | 14519 |
| Daniel Ross | Taunton, MA | — | Designer | 15161 |
| Daniel Schmitt | — | — | Inspector | 14473 |
| Daniel Sheehan | Philllipston, MA | — | Designer | 14782 |
| Daniel Story | — | — | Inspector | 14993 |
| Daniel Sullivan | Warwick, RI | — | DesignerInspector | 14450 |
| Daniel Syriala | Wareham, MA | — | DesignerInspector | 13843 |
| Daniel T. Walsh | Norwood, MA | — | Designer | 15100 |
| Daniel Thompson | Melrose, MA | — | DesignerInspector | 14669 |
| Danielle Gurgel | — | — | Inspector | 14710 |
| Danielle Gurgel | Dighton, MA | — | Designer | 14700 |
| Dante Cellana | Adam, MA | — | Inspector | 14329 |
| Darlene M. Coyle | — | — | Inspector | 4529 |
| Darlene M. Coyle | Auburn, MA | — | Designer | 2968 |
| Darrell Stone | — | — | Inspector | 4995 |
| Darren Grady | — | — | Inspector | 4627 |
| Darren Grady | Kingston, MA | — | Designer | 13148 |
| Darren J. Michaelis | — | — | Inspector | 3595 |
| Darren J. Michaelis | Middleboro, MA | — | Designer | 1618 |
| Darren M. Meyer | Sandwich, MA | — | Inspector | 3920 |
| Darren M. Meyer | East Sandwich, MA | — | Designer | 1614 |
| Darren R. MacCaughey | — | — | Inspector | 4309 |
| Darren R. MacCaughey | Reading, MA | — | Designer | 1429 |
| Darrin M. Harris | Cummington, MA | — | Designer | 1014 |
| Dave Perry | — | — | Inspector | 587 |
| David A. Clark | Chatham, MA | — | Designer | 391 |
| David A. Oberlander | — | — | Inspector | 1024 |
| David A. Oberlander | Mansfield, MA | — | Designer | 1799 |
| David A. Poirier | — | — | Inspector | 875 |
| David B. Chandler | — | — | Inspector | 37 |
| David B. Mason | — | — | Inspector | 287 |
| David B. Mason | Barnstable, MA | — | Designer | 1501 |
| David Berry, Sr. | — | — | Inspector | 4008 |
| David Boyer | Westborough, MA | — | Designer | 224 |
| David C. Balk | — | — | Inspector | 3045 |
| David C. Balk | Northfield, MA | — | Designer | 72 |
| David C. Bennett | Orleans, MA | — | Inspector | 1299 |
| David C. Bennett | South Orleans, MA | — | Designer | 135 |
| David Cellana | Adams, MA | — | Inspector | 12701 |
| David Ceppetelli | — | — | Inspector | 14580 |
| David Coakley | Falmouth, MA | — | DesignerInspector | 14756 |
| David D. Coughanowr | Chatham, MA | — | Designer | 461 |
| David D. Flaherty Jr. | — | — | Inspector | 4713 |
| David D. Flaherty Jr. | Harwich, MA | — | Designer | 2755 |
| David F. Clark | — | — | Inspector | 42 |
| David Fletcher | Wareham, MA | — | Inspector | 4516 |
| David Fredette | Bedford, MA | — | Inspector | 2900 |
| David Fredette | New Bedford, MA | — | Designer | 804 |
| David G. Drain | — | — | Inspector | 1641 |
| David G. Drain | Plymouth, MA | — | Designer | 2788 |
| David Gregorowicz | Stoneham, MA | — | Designer | 15020 |
| David Hoerr | — | — | Inspector | 13021 |
| David Iorio Izzo | — | — | Inspector | 15046 |
| David J. Fill Ii | — | — | Inspector | 15128 |
| David Jewett | Saybrook, CT | — | Inspector | 14184 |
| David L. Favreau | — | — | Inspector | 4278 |
| David L. Favreau | Sterling, MA | — | Designer | 3026 |
| David Lajoie | Wellfleet, MA | — | Inspector | 1843 |
| David Lajoie | South Wellfleet, MA | — | Designer | 1303 |
| David M. Bodendorf | Westfield, MA | — | Designer | 193 |
| David M. Davignon | — | — | Inspector | 2547 |
| David M. Robinson | Londonderry, NH | — | Designer | 13799 |
| David Mackwell | Braintree, MA | — | Designer | 1439 |
| David N. Romero | — | — | Inspector | 10358 |
| David N. Romero | Merrimack, NH | — | Designer | 2080 |
| David Nader | Lawrence, MA | — | Designer | 14257 |
| David Newhall | Hingham, MA | — | DesignerInspector | 14226 |
| David P. Glenn | Hopedale, MA | — | Designer | 888 |
| David Penney | — | — | Inspector | 4043 |
| David Potter | Wesport, MA | — | Designer | 2913 |
| David Powers | Hadley, MA | — | Inspector | 15056 |
| David Quinn | Orleans, MA | — | Inspector | 195 |
| David Quinn | South Orleans, MA | — | Designer | 1988 |
| David R. Jordan | — | — | Inspector | 4688 |
| David R. Jordan | Manchester, NH | — | Designer | 1155 |
| David S. Kelley | Beverly, MA | — | Designer | 14557 |
| David Sadowski | Clinton, MA | — | DesignerInspector | 13830 |
| David Scharlacken | Franklin, MA | — | Designer | 14279 |
| David Schofield | — | — | Inspector | 3241 |
| David Schofield | Wayland, MA | — | Designer | 2172 |
| David Sperduto | North Billerica, MA | — | Designer | 2306 |
| David Tompkins | — | — | Inspector | 15069 |
| David Visco | — | — | Inspector | 13236 |
| David W. Atkinson, Jr. | — | — | Inspector | 8 |
| David W. Berry, Jr. | — | — | Inspector | 3996 |
| David W. Stanton | Waquoit, MA | — | Designer | 2767 |
| David Walsh | — | — | Inspector | 13725 |
| David White | Methuen, MA | — | Designer | 14787 |
| Dean G. Luscomb | — | — | Inspector | 848 |
| Dean R. Dynan | — | — | Inspector | 12837 |
| Deborah J. Revelle | Attleboro, MA | — | DesignerInspector | 13703 |
| Deborah K. Vondal | Athol, MA | — | Designer | 12774 |
| Deborah Rogers | — | — | Inspector | 4184 |
| Deborah Rogers | Sanbornville, NH | — | Designer | 2070 |
| Deborah W. Keller | Hanover, MA | — | Designer | 14221 |
| Dennis A. Earle | Sandwich, MA | — | Inspector | 4335 |
| Dennis C. Rice | — | — | Inspector | 4917 |
| Dennis C. Rice | Oakham, MA | — | Designer | 2036 |
| Dennis G. Quintal | Newton, NH | — | Designer | 1991 |
| Dennis M. Costello | — | — | Inspector | 3981 |
| Dennis M. Costello | Boylston, MA | — | Designer | 454 |
| Dennis R. Lacourse | — | — | Inspector | 516 |
| Dennis R. Lacourse | Holyoke, MA | — | Designer | 1297 |
| Dereck Pacheco | Hyannis, MA | — | DesignerInspector | 14629 |
| Derek Boudreau | — | — | Inspector | 14926 |
| Derek Franklin | Attleboro, MA | — | Inspector | 4438 |
| Derek Fullerton | — | — | Inspector | 3933 |
| Derek Fullerton | Middleton, MA | — | Designer | 814 |
| Derek Grant | — | — | Inspector | 14494 |
| Derek Kwok | Medway, MA | — | DesignerInspector | 14351 |
| Derek Macedo | Acushnet, MA | — | DesignerInspector | 14174 |
| Derek S. Simmons | — | — | Inspector | 3959 |
| Derek T. Long | Londonderry, NH | — | Designer | 14349 |
| Derrick J. Hale | Abington, MA | — | Designer | 14010 |
| Desheng Wang | — | — | Inspector | 4612 |
| Desheng Wang | Southboro, MA | — | Designer | 2545 |
| Devin Dean | — | — | Inspector | 15067 |
| Devin Hill | — | — | Inspector | 14426 |
| Devin P. Howe | Boston, MA | — | Designer | 14814 |
| Devon Thornton | — | — | Inspector | 14841 |
| Diana Ekman | Belmont, MA | — | DesignerInspector | 13903 |
| Diana Rodriguez | Westfield, MA | — | Designer | 15180 |
| Diane Heath | Taunton, MA | — | Designer | 15158 |
| Diane Pantermoller | Derry, NH | — | Designer | 1835 |
| Dominique Hurley | Gloucester, MA | — | DesignerInspector | 14967 |
| Donald A. Provencher | — | — | Inspector | 1442 |
| Donald A. Provencher | Merrimack, NH | — | Designer | 1976 |
| Donald Desmarais | Mashpee, MA | — | Designer | 2875 |
| Donald E. Matthews | — | — | Inspector | 12852 |
| Donald F. Bracken | Sandwich, MA | — | Designer | 226 |
| Donald J. Medeiros | Little Compton, RI | — | Designer | 1598 |
| Donald M. Peck | Barrington, MA | — | Inspector | 3299 |
| Donald P. Berndt | — | — | Inspector | 2889 |
| Donald Rose | — | — | Inspector | 4474 |
| Donald Rose | Norwell, MA | — | Designer | 2799 |
| Donald Wilkinson | — | — | Inspector | 13549 |
| Donna Bowman | — | — | Inspector | 14803 |
| Donna Farias | Dartmouth, MA | — | Designer | 14760 |
| Doug Manganiello | — | — | Inspector | 15139 |
| Douglas A. Brown | — | — | Inspector | 4297 |
| Douglas A. Grover | Orleans, South, MA | — | Designer | 963 |
| Douglas E. Cooper | — | — | Inspector | 2857 |
| Douglas E. Cooper | Edgartown, MA | — | Designer | 438 |
| Douglas J. Atkinson | — | — | Inspector | 7 |
| Douglas J. Hartnett | — | — | Inspector | 339 |
| Douglas J. Hartnett | Franklin, MA | — | Designer | 1018 |
| Douglas J. MacLeay | Colrain, MA | — | Designer | 1441 |
| Douglas J. Smith | Manchester, NH | — | Designer | 2267 |
| Douglas Lees | Londonderry, NH | — | Designer | 1351 |
| Douglas Mercurio | Valley, MA | — | DesignerInspector | 14641 |
| Douglas W. Andrysick | — | — | Inspector | 770 |
| Douglas W. Andrysick | Princeton, MA | — | Designer | 3058 |
| Drew Belsky | Edgartown, MA | — | DesignerInspector | 14815 |
| Drew Forest | Belchertown, MA | — | Designer | 14239 |
| Drew Gallant | Medford, MA | — | DesignerInspector | 14482 |
| Drew Grenier | Woburn, MA | — | Designer | 15039 |
| Dustin Whiteaker | — | — | Inspector | 15121 |
| Dylan Considine | — | — | Inspector | 14642 |
| Dylan Finlay | — | — | Inspector | 15047 |
| Dylan Harrigan | Palm Bay, FL | — | Inspector | 13918 |
| Dylan Labonte | Bellingham, MA | — | DesignerInspector | 14953 |
| Dylan Ribeiro | — | — | Inspector | 4991 |
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