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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Kamal R Hingorany | Portsmouth, RI | — | Designer (Class III) | D3051 |
| Kamal R Hingorany | Portsmouth, RI | — | Designer (Class IV Soil Evaluator) | D4005 |
| Karl J Russo | North Scituate, RI | — | Installer | L0939 |
| Karop Dirazonian | Burrillville, RI | — | Installer | L1949 |
| Kathleen P Mangan | Jackson, NH | — | Designer (Class IV Soil Evaluator) | D4025 |
| Kegan P Labonte | Smithfield, RI | — | Installer | L1934 |
| Keith Compart | Warwick, RI | — | Installer | L1504 |
| Keith J Hickey | Swansea, MA | — | Installer | L1933 |
| Kenneth Adler | Greenville, RI | — | Installer | L0520 |
| Kenneth Chapdelaine | Coventry, RI | — | Installer | L0643 |
| Kenneth G Terranova | Peacedale, RI | — | Installer | L1523 |
| Kenneth J Foley | Rehoboth, MA | — | Installer | L0687 |
| Kenneth Laing | Bradford, RI | — | Installer | L1918 |
| Kenneth M Gladding | Jamestown, RI | — | Installer | L1215 |
| Kenneth R Boyer | Hope Valley, RI | — | Installer | L0600 |
| Kenneth R Cole Jr | Ormond Beach, FL | — | Designer (Class IV Soil Evaluator) | D4038 |
| Kenneth R Cole Jr | Ormond Beach, FL | — | Installer | L1474 |
| Kevin Almeida | Rehoboth, MA | — | Installer | L1834 |
| Kevin C Morin | Cranston, RI | — | Designer (Class III) | D3053 |
| Kevin Fetzer | East Greenwich, RI | — | Designer (Class IV Soil Evaluator) | D4029 |
| Kevin Francis | Bristol, RI | — | Installer | L1056 |
| Kevin Guarreillo | Peacedale, RI | — | Installer | L0674 |
| Kevin J DeMers | Inc Cranston, RI | — | Designer (Class III) | D3096 |
| Kevin J Robishaw Jr | Exeter, RI | — | Installer | L1973 |
| Kevin L Theroux | West Greenwich, RI | — | Installer | L0782 |
| Kevin M Bartlett | Chepachet, RI | — | Designer (Class III) | D3073 |
| Kevin M Kilduff | Charlestown, RI | — | Installer | L1687 |
| Kevin M Wilkie | Little Compton, RI | — | Installer | L1636 |
| Kevin P Hoyt | Block Island, RI | — | Designer (Class I) | D1185 |
| Kevin P Hoyt | Block Island, RI | — | Designer (Class IV Soil Evaluator) | D4084 |
| Kevin R Armstrong | Exeter, RI | — | Installer | L0822 |
| Kevin R Gardner | Ashaway, RI | — | Installer | L2019 |
| Kevin R Harrop | Rumford RI ext 240, RI | — | Designer (Class III) | D3155 |
| Kevin R Olenik | Mystic, CT | — | Installer | L2048 |
| Kevin Wilbur | Providence, RI | — | Installer | L0838 |
| Kim E Litchfield | Tiverton, RI | — | Installer | L1571 |
| Kristen Hemphill | Charlestown, RI | — | Installer | L2044 |
| Kurt S Poulton | Tiverton, RI | — | Installer | L0785 |
| Kyle R McCombs | Harrisville, RI | — | Installer | L2002 |
| Kyle S Markhart | West Greenwich, RI | — | Installer | L1717 |
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