Following is a partial list of clients HDA has worked with through the years. Our client base includes a variety of industrial and business interests, from the chemical and refining industry to accountants and medical associations.
- 8 Rivers
- ALCOA
- All Temp
- Allergan
- American Chemistry Council
- American Petroleum Institute
- American Resort Development Association
- Anheuser-Busch Companies
- AstraZeneca
- Axiall
- BASF Corporation
- Blueprint Louisiana
- Boardwalk Pipeline
- Bossier Chamber of Commerce
- Central Crude
- CF Industries
- Chlorine Institute
- Churchill Downs
- CITGO
- Coalition for a Competitive Louisiana
- Coalition for Common Sense
- Coalition to Insure Louisiana
- Coastal Conservation Association
- Colonial Pipeline
- Cornerstone Chemical Company
- Crompton
- Degussa
- Denbury Resources
- Denka Performance Elastomer
- Dow
- Driving Louisiana Forward
- Dupont
- Ecolab
- Encana
- Eurochem
- ExxonMobil
- Fair Grounds Race Course
- Flint Hills Resources
- Global Environmental Solutions, Inc.
- Golden Pass LNG
- Greenwich Pharmaceuticals Inc.
- Gulf South Pipeline
- Hilcorp
- Honeywell
- Impala Warehousing, LLC
- Independent Insurance Agents & Brokers of Louisiana
- Industries of Southeast Texas
- Ingersoll Rand
- John D. & Catherine T. MacArthur Foundation
- Justice Policy Institute
- Kinder Morgan
- Koch Industries, Inc.
- Krantz Racing Ventures
- Kutchins & Groh, LLC
- Leigh Fisher Associates
- Louisiana Ammonia Producers
- Louisiana Apartment Association
- Louisiana Associated General Contractors
- Louisiana Chemical Association
- Louisiana Offshore Oil Port
- Louisiana Mid-Continent Oil and Gas Association
- Louisiana Oil & Gas Association
- Louisiana Realtors Association
- Louisiana State Medical Society
- Louisiana Tank
- Lyondell/Equistar
- M+R Strategic Services
- Marathon Petroleum
- Methanex
- Molina
- Mosaic Phosphates
- Motiva
- Nalco Company
- Nitrogen H2
- Novartis
- Ochsner Health Systems
- Olin Corporation
- Omega Protein
- OxyChem Partners for Environmental Progress
- PCS Nitrogen
- Pennington Biomedical Research Foundation
- Petrologistics
- Pharmaceutical Research & Manufacturers of America
- Pilot Users Group of Louisiana
- Port Industries of Corpus Christi
- Port of New Orleans
- Potash Corporation
- Ranger Gas Storage
- Refinery Terminal Fire Company
- Resource Environmental Solutions
- Sabine Neches Navigation District
- Sasol
- Shell
- Shintech
- Society of Louisiana CPAs
- Solvay America
- Syngenta
- The Chlorine Institute
- The Forum
- The Williams Companies
- Total
- Vinyl Institute
- Westlake Chemical Corporation
- Williams Energy Services
