Our People


More than engineers and planners, we are engaged professionals and community leaders.


Karen A. Friese, PE

Founder + President

Thomas Owens, PE

Executive Vice President

Joseph Cantalupo, AICP

Senior Vice President

Dale P. Murphy, PE

Vice President, Aviation Practice Leader

Michael Persyn, PE

Associate, Water Practice Leader

Peter A. Ring, PE

Associate, Transportation Practice Leader

Ryan Bell, PE


Abelardo “Abe” Salinas, PE, CFM

Drainage Practice Leader

Trent Slovak, PE, BCEE

Director of Engineering, Southeast Texas