| Haag, Jeff | Brown and Caldwell |
| Haag, Philip | McGinnis, Lochridge & Kilgore, LLP |
| Hackfeld, Curtis | Enterprise Products Company |
| Hackfeld, Lori | ExxonMobil |
| Hadley, Gerald | Albemarle Corporation |
| Hafer, Greg | S & B Engineers and Constructors |
| Haffelder, Glen | LyondellBasell Industries |
| Hagan, Pat | Safway Services, Inc. |
| Hagar, Rick | TOTAL PETROCHEMICALS USA, INC. |
| Hagen, Guy | LyondellBasell Industries |
| Hagler, Debbie | Wilson Supply |
| Haines, Gordon | Great Western Supply Company |
| Haislar, Yvonne | ExxonMobil Chemical Company |
| Hajdasz, Gary | Johnson Controls, Inc. |
| Hake, David | TPC Group |
| Hall, Sally | LyondellBasell Industries |
| Hall, Zachary | ExxonMobil |
| Ham, Kelly | BASF Corporation - Lancaster Construction |
| Hambrick, John | Sprint Safety |
| Hambrick, Marion | Securitas Security Services USA, Inc. |
| Hamilton, Gordon | DuPont - First Chemical - TX |
| Hamilton, Jonathon | ExxonMobil |
| Hamilton, W. | Goodyear Chemical |
| Hammond, Jane | Gardere Wynne Sewell LLP |
| Hammonds, Jack | GATXRail |