| Kelvin Reinhardt | Lime Association of Texas | Associate Member |
| Barrett Reynolds | US Lime & Minerals - Texas Lime | Associate Member |
| Kyle Riggs | US Lime - Texas Lime | Associate Member |
| Justin Roark | Zack Burkett Co. | Regular Member |
| Robbie Roberts | Knife River | Regular Member |
| Raymond Rodriguez | Terracon | Associate Member |
| Jon Roemke | EARTHWAVE TECHNOLOGIES, INC. | Associate Member |
| Steve Roensch | TXAPA | Other |
| Matt Rooker | Rooker Asphalt | Major Associate Member |
| Tasi Roth | Ruckit | Regular Member |
| Veronica Ruiz | (not set) | Other |
| Andrew Ryks | Duininck Inc. | Regular Member |
| Ernesto Santillan | Ergon Asphalt & Emulsions | Major Associate Member |
| Ken Sapien | Beyond Engineering and Testing | Associate Member |
| David Sargent | Stripe-A-Zone | Associate Member |
| Doug Satz | HAC Materials, Ltd. | Regular Member |
| Nick Schack | Gulf Coast a CRH Company | Regular Member |
| Suzanne Schafer | Certarus CNG, Ltd | Other |
| Lee Scheel | Capitol Aggregates | Associate Member |
| Rick Schleider | Wright Asphalt Products LLC | Regular Member |
