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Team overview

At SEMA, great work starts with great leadership. Our team is made up of devoted, down-to-earth experts who lead with collaboration, innovation, and a genuine love for what they do. By blending expertise with passion, they encourage meaningful growth and deliver lasting results.

Tom Ames

Tom Ames

  • Owner and Founder
Bradley Spies

Bradley Spies

  • Minority Owner and District President, Florida and National Building Expert
T. Brett Ames

T. Brett Ames

  • CEO, Corporate and District President, California, Rocky Mountain, Texas & Mid Atlantic
Tim Ackerman, MBA

Tim Ackerman, MBA

  • Chief Financial Officer and Treasurer, Corporate
Elver Bernal, CHST

Elver Bernal, CHST

  • Vice President, Safety and Human Resources, Corporate
Steven C. Mills

Steven C. Mills

  • Vice President, Contracts Manager, Corporate
Mark Brooks, P.E., M.S., DBIA

Mark Brooks, P.E., M.S., DBIA

  • Senior Vice President, Rocky Mountain District and National Pricing Expert
Geoff Mestas, P.E., DBIA, ENV SP

Geoff Mestas, P.E., DBIA, ENV SP

  • Vice President Alternative Delivery
Jeff Markle, P.E., DBIA, ENV SP

Jeff Markle, P.E., DBIA, ENV SP

  • Vice President, Structures and Engineering, Rocky Mountain District
Eric Stepien, ENV SP

Eric Stepien, ENV SP

  • Vice President, California District
Venkata Dusi, M.S.

Venkata Dusi, M.S.

  • Chief Technology Officer and Business Analyst, Corporate
Tony Swedin, ENV SP

Tony Swedin, ENV SP

  • Vice President, Heavy Rail, National Expert
Scott Gerrard, ENV SP

Scott Gerrard, ENV SP

  • Vice President, Preconstruction - Heavy Rail, National Expert
Carson T. Carney, P.E., MBA, ENV SP

Carson T. Carney, P.E., MBA, ENV SP

  • Vice President, Structures and Engineering, Rocky Mountain District, National Structures Expert
Lance Thompson, ENV SP

Lance Thompson, ENV SP

  • Preconstruction Manager, Power, Solar, and Energy Lead, National Expert
Justin Oakes, P.E. M.S., DBIA, ENV SP

Justin Oakes, P.E. M.S., DBIA, ENV SP

  • Vice President, Florida District
Robert Stevens, ENV SP

Robert Stevens, ENV SP

  • Senior Vice President, Texas District and Special Projects Group

SEMA Construction named awarded “Top Workplaces 2025” by USA Today

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SEMA Construction named awarded “Top Workplaces 2025” by USA Today