| Seneca Companies | Jodi Solomon | Des Moines | IA |
| OPW Fueling Components, A Dover Company | Bryan Somerville | West Chester | OH |
| Sonny's Enterprises, Inc. | Brad Sorenson | Tamarac | FL |
| MECO, Inc. (Montgomery) | Jamal Southall | Montgomery | AL |
| Continental ContiTech/Veyance Technologies | Andy Speidel | Fairlawn | OH |
| Oscar W. Larson Co. | Justin Spence | Clarkston | MI |
| JF Petroleum Group (Branch) | Stan Spofford | San Antonio | TX |
| Kentucky Div. of Waste Management | Rob Staley | Frankfort | KY |
| Fatboy Electric, Inc. | Ben Stallings | Kansas City | MO |
| Franklin Fueling Systems | Heather Stangeland | Madison | WI |
| Walsh, Long & Company, Inc. | Andy Stanislo | Naperville | IL |
| Franklin Fueling Systems | Dan Steiner | Madison | WI |
| Florida Metro Construction Company, Inc. | Danise Steiner | Dania Beach | FL |
| Canary Compliance | Lauren Steltzer | Philadelphia | PA |
| MECO, Inc. (Montgomery) | Lisa Stephens | Montgomery | AL |
| Emil Pawuk and Associates Inc. | Lynn Stephens | Richfield | OH |
| Western Global | Ken Steury | Clawson | MI |
| Leighton O'Brien Inc. | Jeff Stevenson | Hawthorn East | Victoria |
| Tanknology, Inc. | Megan Stewart | Austin | TX |
| OPW Fueling Components, A Dover Company | Steve Stewart | West Chester | OH |
