About Us


“We are partners, friends, and coworkers. We continue to build our company by selecting people who are compassionate about providing safe infrastructure for the communities we serve.”



EST is guided by our core values of honesty, integrity and professionalism to the highest degree. We approach every project with enthusiasm, commitment and pride of workmanship. Our staff is dedicated to providing a specialized solution for our clients, one that is catered to their specific needs and wants and one that will be innovative and cost-effective.



EST’s strong leadership upholds our core values and ensures that we continue to provide clients with quality professional service that they can rely on.

Keep scrolling to meet our team.




Our clients know they can depend on us to provide quality engineering services that incorporate cutting-edge innovation and that enhance safety, mobility, quality of life and economic vitality.



Our Approach

We are committed to providing our clients innovative and specialized solutions that are tailored to their specific needs and challenges. Our staff of seasoned experts serve as a one-stop shop by providing the full spectrum of civil engineering services from a project’s inception with environmental studies to the construction management and materials testing at the project’s completion. We eliminate the need for a middle man and provide our clients with a more simplified, cost-effective process through the completion of a project.

Meet the Team

Michael Vahabzadegan, PE

Michael Vahabzadegan, PE


As Founder and President of EST in 2000, Mike is committed to providing multi-faceted, comprehensive engineering services to a wide range of companies, municipalities, government entities, and other organizations.

Throughout his career of 30+ years in engineering, he has provided services to multiple state departments of transportation, the Federal Aviation Administration, Native American tribes, and many private sector clients.

Mike has a Bachelor of Science and a Master of Science in Civil Engineering, both from the University of New Mexico. He’s a licensed professional engineer in five states: Oklahoma, Colorado, Texas, Kansas, and Arkansas.

Paul Poynter, PE

Paul Poynter, PE

Vice President

As Vice President for Structural Engineering, Paul oversees all structural engineering projects to ensure they conform to necessary specifications and meet EST’s high quality standards.

A member of the EST team since 2002, Paul previously worked in the structural engineering department at Oklahoma State University conducting research to determine the fatigue capacity of steel bridge girders and assisting with other research. He also worked in the bridge division at Oklahoma Department of Transportation and was promoted to the top structural engineering position. While at EST, Paul was selected by ODOT to write the County Bridge Standards used by all engineers across the state.

Paul holds both a Bachelor and a Master of Science in Civil/Structural Engineering from Oklahoma State University and is a licensed professional engineer in Oklahoma.

Shane Long

Shane Long

Vice President

As Vice President and Operations Manager for the Site Design and Materials Testing Divisions, Shane works closely with the EST team and clients to coordinate survey, geotechnical investigations, environmental studies, utility relocation, civil site design, and project closeout.

He joined EST in 2001 and has 25+ years of experience in site design and construction management. His responsibilities include conducting project cost analysis, scheduling jobs, project management, and serving as the client contact. He currently serves as the site design contact for Tribal Development and manages operations in southern Oklahoma.

Shane has a Bachelor of Science in Construction Management from Oklahoma State University and holds multiple certifications.

Gary Evans, PE

Gary Evans, PE

Director of Operations

As Director of Operations, Gary provides guidance in many areas of transportation services with a strong focus on construction management to ensure each job meets EST’s high quality standards.

With 30+ years of experience, Gary is considered one of Oklahoma’s leading experts in construction management of public transportation infrastructure. His extensive experience at Oklahoma Department of Transportation included roles as a traffic engineer, field division engineer, Director of Operations, Deputy Director and Chief Engineer where he led a staff of 1,700 transportation professionals.

After retiring from ODOT in 2013, Gary joined the EST team. He has a Bachelor of Science in Civil Engineering from the University of Missouri and is a licensed professional engineer in the state of Oklahoma.


Brad Martin, PE

Brad Martin, PE

Texas Director of Operations

In 2016, Brad Martin joined EST as the Director of Texas Operations and is responsible for leading all aspects of EST’s well-diversified engineering operations including construction management, design, planning, materials engineering, geotechnical, site development and surveying.

Prior to joining the EST team, Brad had 28 years of service with TxDOT from the Paris District. He worked as a roadway/bridge designer and construction engineer before progressing through several managerial positions including Assistant Area Engineer for the Sulphur Springs Area Office, AE for the Paris and Sulphur Springs Area Offices, Director of Construction and Director of Operations.

Brad is a licensed professional engineer in the state of Texas.

Caleb Austin, PE

Caleb Austin, PE

Director of Engineering

Caleb has 20 years of design at Oklahoma DOT Roadway Design Division where he was involved in all aspects of roadway engineering. Caleb’s background includes a thorough understanding of design procedures, standards, specifications, and guidelines for various entities.

Caleb has been a Project Engineer then served as an Engineering Manager of a design group for ODOT. In 2014, he was selected to be the Roadway Design Engineer for ODOT, leading all design teams for roadway and highway engineering. Caleb joined EST in 2021 as the Director of Engineering. In this position he provides guidance in various areas of transportation services, but his focus remains with Design Engineering.

Regional Offices – Teams

Kelly Selman, PE

Texas Regional Director

Paul Jesaitis, PE

Colorado Regional Director

Mykol Woodruff, PE

Dallas Regional Director

Mike Bostic, PE

Ft. Worth Regional Director

Saeed Sobhi, PE

Denver Regional Manager

Brent Frank, PE

Antlers Regional Manager

Mark Andrew, PE

Colorado Springs Regional Manager

Kevin Kriewall, PE

Tulsa Division Engineer

W. David Smith, PE

County Regional Engineer


Cassidy Doescher, PE

Norman Division Engineer

Mohamed Elyazgi, PE

EST Design Engineer

Pete Regan, Esq.

Tulsa Regional Director

Client Manager

Amy Backel, PE

EST Bridge Engineer


Darin Metzer

Laboratory Manager

Brian Cales, PE

Water/Wastewater Team Leader

Jay Adams

Marketing & Proposal Manager

Client Manager

Contact Us

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Corporate Headquarters

615 N Hudson Avenue, Suite 300 Oklahoma City, OK 73102

(405) 815-3600

(405) 815-4080