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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Gary C Lamond | North Kingstown, RI | — | Designer (Class III) | D3075 |
| Gary E Brayman | Hope Valley, RI | — | Installer | L1422 |
| Gary G Tikoian | Smithfield, RI | — | Installer | L0693 |
| Gary Studley | West Greenwich, RI | — | Installer | L0467 |
| Gashtasb D Dowlatshahi | Cranston, RI | — | Installer | L1088 |
| Gene A Hall | — | — | Installer | L1092 |
| Geoffrey N Bouchard | Wakefield, RI | — | Installer | L1891 |
| George Calcagni | Johnston, RI | — | Installer | L0048 |
| George G Palmisciano | Lincoln, RI | — | Designer (Class III) | D3036 |
| George M Barkan | Foster, RI | — | Installer | L1651 |
| George O Steere Jr. | Chepachet, RI | — | Installer | L0485 |
| George O Tashjian | Johnston, RI | — | Installer | L1236 |
| George Simone | Sterling, CT | — | Installer | L1287 |
| George W Carpenter | Harrisville, RI | — | Installer | L1390 |
| George W Kellum | Rehoboth, MA | — | Installer | L1840 |
| Gerald Del Signore | Glocester, RI | — | Installer | L0913 |
| Gerald P Zarrella | Exeter, RI | — | Installer | L1285 |
| Geralyn E Small | Middletown Inc, RI | — | Designer (Class III) | D3089 |
| Gino A Mazzenga | Hope, RI | — | Installer | L1620 |
| Glen T Skurka | Coventry, RI | — | Designer (Class I) | D1159 |
| Glen T Skurka | Coventry, RI | — | Designer (Class IV Soil Evaluator) | D4056 |
| Glen T Skurka | Coventry, RI | — | Installer | L1440 |
| Glenn D Pontes | Dartmouth, MA | — | Installer | L1768 |
| Glenn H Gough Jr. | West Kingston, RI | — | Installer | L1138 |
| Glenn R Goguen | Charlestown, RI | — | Installer | L1482 |
| Gordon E Rogers | Foster, RI | — | Installer | L1678 |
| Grant E Simpson | Seekonk, MA | — | Designer (Class III) | D3150 |
| Gregory A Avenia | Providence Solutions, Inc., RI | — | Designer (Class III) | D3118 |
| Gregory A Nunes | Hope, RI | — | Installer | L1752 |
| Gregory B Soscia | Greene, RI | — | Installer | L1727 |
| Gregory D LaCroix | Lincoln, RI | — | Designer (Class IV Soil Evaluator) | D4103 |
| Gregory E Phillips | New Shoreham, RI | — | Installer | L1995 |
| Gregory F Desnoyers | North Kinstown, RI | — | Installer | L2031 |
| Gregory M Lach | Little Compton, RI | — | Installer | L1716 |
| Gregory P MacPherson | North Smithfield, RI | — | Installer | L1904 |
| Gregory R Coe | Middletown, RI | — | Installer | L1931 |
| Gregory S Anderson | Charlestown, RI | — | Installer | L2024 |
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