ENGINEERING
Engineering Team
![Doug Holdener - Circle Crop](https://florida.concretepipe.org/hubfs/Doug%20Holdener%20-%20Circle%20Crop.jpg)
Douglas J. Holdener, P.E.
Director, FCPA
25 yrs. Civil Engineering Experience
- Engineering Consultant
- Concrete Pipe Producer
- Florida Power & Light Contractor
Texas A&M University (M.S. in Civ. Eng.)
Washington University in St. Louis (B.S., C.E.)
![Angel De Jesus - Circle Crop](https://florida.concretepipe.org/hubfs/Angel%20De%20Jesus%20-%20Circle%20Crop.jpg)
Angel De Jesus, P.E.
Technical Resource Engineer, County Materials
42 yrs. Experience
- Pressure Pipe
- Reinforced Concrete Pipe
- Precast Structural Engineering
- Pipeline Engineering
- Manufacturing, Quality Control/Assurance
Licensed P.E. in Florida
University of Puerto Rico – Mayaguez Campus (B.S. Civil Engineering)
![Melitza Avila - Circle Crop](https://florida.concretepipe.org/hubfs/Melitza%20Avila%20-%20Circle%20Crop.jpg)
Melitza Avila
Technical Resource Specialist, Rinker Materials
14 yrs. Experience
- Concrete Pipe Manufacturer
- Stormwater Management
ASTM Cmte. Member
- C13 – Concrete Pipe
- C27 – Precast Concrete Products
- F17 – Plastic Piping Systems
- F36 – Technology and Underground Utilities
![Russell Tripp Circle Crop](https://florida.concretepipe.org/hubfs/Russell%20Tripp%20%20Circle%20Crop.jpg)
Russell Tripp, P.E.
Technical Resource Engineer, Rinker Materials
20 Yrs. Experience in Natural Gas Industry
20 yrs. Experience in the Drainage Industry
Licensed P.E. in CA, FL, GA, SC & TX
Clemson University (B.S. Civil Engineering)