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People

President

Alan Johnston, Jr., PE, a third-generation engineer and native Houstonian with an interest in serving his community, founded Johnston in 2001. He has a true passion for helping solve client’s problems and being a true partner in addressing their needs. His entrepreneurial spirit and transparent leadership have continued the success of the firm for the past 20 years.

“Excitement is the feeling I get every Sunday about 2pm gearing up for the coming week. It is very satisfying, and I am very fortunate to be a part of a team that serves as trusted consultants to our expanding client base. Growing up around the A/E business, in addition to being a third-generation engineer, may have something to do with it, but for as long as I can remember, I have wanted to do exactly what I am doing today.

What is most gratifying about Johnston is simply our ability to provide effective solutions to our clients. It makes it even more rewarding when you can provide these solutions through the collaborative support of the talented individuals that make up our firm. We have a successful practice with strong core values including commitment to our clients, employees and the built environment.”

Mark Letos

Mark Letos

Operations Manager
Paula  Gaviria, Associate AIA

Paula Gaviria, Associate AIA

Principal, Director of Healthcare Architecture
Richard Leyendecker, AIA

Richard Leyendecker, AIA

Principal, Technical Leader / Senior Architect
Alan Black, AIA

Alan Black, AIA

Senior Medical Planner / Programmer
Carl Crow, PE

Carl Crow, PE

Team Lead - Mechanical Engineering
Larry Pennington, PE

Larry Pennington, PE

Team Lead - Electrical Engineering
Joe Velasco

Joe Velasco

Team Lead - Plumbing
Rick Quintanilla, PE

Rick Quintanilla, PE

Senior Electrical Engineer
Lyubo Stanev

Lyubo Stanev

BIM Manager
Sirine Zeitoune

Sirine Zeitoune

Director of Finance
Bri Santana

Bri Santana

Acounting Manager
Teri Cameron

Teri Cameron

Marketing Manager
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