1. Graduate Research Assistant, Engineering School of Sustainable Infrastructure & Environment, Univ. of Florida, Gainesville, FL.
2. Research Assistant Scientist, Engineering School of Sustainable Infrastructure & Environment, Univ. of Florida, Gainesville, FL.
3. Professor Emeritus, Engineering School of Sustainable Infrastructure & Environment, Univ. of Florida, Gainesville, FL.
4. Senior Geotechnical Engineer, Florida Department of Transportation, Central Office, Tallahassee, FL.
5. State Geotechnical Materials Engineer, Florida Department of Transportation, State Materials Office, Gainesville, FL.