HDCA Clients
- City of Slidell, LA
- St. Bernard Parish Government
- Jefferson Parish, Louisiana
- Terrebonne Parish Consolidated Government (TPCG)
- Plaquemines Parish
- City of Kenner, Louisiana
- City of Tallulah, Louisiana
- Town of Lecompte, Louisiana
- United States Army Corps of Engineers – New Orleans District
- USACE - Mobile
- Hollingsworth Design Service
- United Parcel Service (UPS)
- Webber Land & Development
- The NHP Foundation
- Camp Dresser & McKee, Inc.
- Bryant Hammett & Associates, LLC
- Jacobs Engineering (Formerly Jordan, Jones & Goulding)
- Royal Engineering Consultants
- Shread Kuyrkendall & Associates
- Montgomery Watson Harza (MWH)
- J&J Engineers, Baton Rouge, LA
- Westech Engineering
- Occidental Chemical Corporation (Oxy)
- Healtheon, Inc.
- Coastal Process, LLC
