Lonnie G. Harper and Associates, Inc. has worked for many different clients from the Local, State, and Federal levels, as well as private companies and major landowners throughout Louisiana. Below is an abbreviated list of major clients.
- Natural Resources Conservation Service
- US Corps of Engineers
- State of Louisiana Facility Planning & Control
- Louisiana Department of Wildlife and Fisheries
- Louisiana Department of Natural Resources
- The Coastal Protection and Restoration Authority of Louisiana
- Cameron Parish Police Jury
- Cameron Parish Gravity Drainage Districts
- Cameron Parish Water Works Districts
- City of Lake Charles
- Cheniere Energy, Inc.
- Exxon
- Chevron
- Shell Oil
- Texaco
- Gray-Stream Estate
- Port Cameron
- Venture Global LNG
- Cameron LNG
