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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| A Rego Septic Service | Portsmouth, RI | — | Septage Hauler | 3 |
| A&d Sanitation | Somerset, MA | — | Septage Hauler | 508 |
| Aaron Medeiros | Dartmouth, MA | — | Installer | L1865 |
| Aaron Muniz | Warwick, RI | — | Installer | L1864 |
| Abm Enterprise Llc | Cranston, RI | — | Septage Hauler | 958 |
| Acme Sanitation | Little Compton, RI | — | Septage Hauler | 316 |
| Action Enterprises Services, Inc. | Lowell, MA | — | Septage Hauler | 984 |
| Adam E Rosenblatt | Providence, RI | — | Designer (Class IV Soil Evaluator) | D4051 |
| Adam N Labonte | West Greenwich, RI | — | Installer | L2028 |
| Adam S White | North Kingstown, RI | — | Installer | L1772 |
| Adolf F Haffenreffer | Little Compton, RI | — | Installer | L0940 |
| Alan C Pittman | Providence, RI | — | Designer (Class IV Soil Evaluator) | D4100 |
| Alan J Ouellette | Attleboro, MA | — | Installer | L1268 |
| Alanson M Roberts | — | — | Installer | L0805 |
| Albert Marsocci | Cranston, RI | — | Installer | L1119 |
| Alessandro M Venditti | Cranston, RI | — | Installer | L2049 |
| Alexander J Carey | Coventry, RI | — | Installer | L2008 |
| Alexander J Gomes | Dighton, MA | — | Installer | L1951 |
| Alexander J Wynne | Providence, RI | — | Installer | L2009 |
| Alfred A Sousa | Tiverton, RI | — | Installer | L1872 |
| Alfred Cole Jr. | North Kingstown, RI | — | Installer | L0299 |
| Alfred R Dufresne | Dayville, CT | — | Installer | L1394 |
| Alfred W DiOrio | Ashaway, RI | — | Designer (Class II) | D2032 |
| Alfred W DiOrio | Ashaway, RI | — | Designer (Class IV Soil Evaluator) | D4004 |
| Alfred W DiOrio | Ashaway, RI | — | Installer | L0662 |
| Allan L Shear | Rumford, RI | — | Designer (Class III) | D3023 |
| Allison M Drake | Cranston, RI | — | Designer (Class IV Soil Evaluator) | D4105 |
| Amber K Fagan | Saunderstown, RI | — | Designer (Class I) | D1310 |
| Amber K Fagan | Saunderstown, RI | — | Installer | L1990 |
| Amber K Hardy | Inc Charlestown, RI | — | Designer (Class IV Soil Evaluator) | D4098 |
| Amy N Sonder | LLC Saunderstown, RI | — | Designer (Class II) | D2055 |
| Andrew A McNulty | Providence, RI | — | Designer (Class IV Soil Evaluator) | D4099 |
| Andrew A Metivier | Rehoboth, MA | — | Installer | L2025 |
| Andrew C Smiley Jr. | Saunderstown, RI | — | Installer | L1366 |
| Andrew D Aubuchon | North Smithfield, RI | — | Installer | L2038 |
| Andrew D DeRiso | Providence, RI | — | Designer (Class IV Soil Evaluator) | D4101 |
| Andrew E Morgan | — | — | Installer | L2018 |
| Andrew J Flynn | Wakefield, RI | — | Installer | L1611 |
| Andrew K Gardiner | Westerly, RI | — | Designer (Class III) | D3128 |
| Andrew P Kent | Middletown, RI | — | Installer | L1025 |
| Andrew Rego | Little Compton, RI | — | Installer | L1867 |
| Andrew V Sisson | Little Compton, RI | — | Installer | L2010 |
| Angelo M Raimondi | Coventry, RI | — | Designer (Class II) | D2015 |
| Angelo M Raimondi | Coventry, RI | — | Designer (Class IV Soil Evaluator) | D4016 |
| Angelo M Sullo | Pawcatuck, CT | — | Designer (Class III) | D3131 |
| Anthony A DiFazio | Johnston, RI | — | Installer | L1295 |
| Anthony A Esposito | Plymouth, MA | — | Designer (Class III) | D3153 |
| Anthony A Nenna | Westerly, RI | — | Designer (Class III) | D3078 |
| Anthony L Squillante | West Warwick, RI | — | Installer | L1978 |
| Anthony Mattiello Jr. | Cranston, RI | — | Installer | L1439 |
| Anthony S Macari | Cranston, RI | — | Installer | L1465 |
| Anthony T Pelloni | Ashaway, RI | — | Installer | L1417 |
| Anthony V Santilli | West Warwick, RI | — | Designer (Class I) | D1103 |
| Anthony V Santilli | West Warwick, RI | — | Installer | L0586 |
| Antonio M Pereira | Cranston, RI | — | Installer | L1690 |
| Armando J Ricci | Providence, RI | — | Designer (Class III) | D3069 |
| Armando J Ricci | Providence, RI | — | Installer | L1380 |
| Arthur F Smith Jr | Tiverton, RI | — | Installer | L1587 |
| Arthur J Frattini | Charlestown, RI | — | Installer | L0787 |
| Arthur Mercure, III | Smithfield, RI | — | Installer | L1155 |
| Arthur R Cripps Jr. | Coventry, RI | — | Designer (Class III) | D3030 |
| Arthur R Cripps Jr. | Coventry, RI | — | Designer (Class IV Soil Evaluator) | D4024 |
| Arthur S Clarke, III | Jamestown, RI | — | Installer | L0130 |
| Arthur W Beauregard | Westerly, RI | — | Installer | L0443 |
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