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Denver, Colorado

Denver, Colorado

1873 S. Bellaire Street, Suite 1101
Denver, Colorado 80222

Denver, Colorado

1873 S. Bellaire Street, Suite 1101
Denver, Colorado 80222


(720) 779-3600


(303) 798-9462

Gary Johnson, PE, PTOE

Colorado Regional Director


Gary serves as EST’s Colorado Regional Director overseeing all company affairs and interests in the Denver and Northern Colorado. This includes, but is not limited to: construction management, roadway and bridge design, survey, and traffic engineering and management operations.

Denver Staff

Amy Backel, PE
Professional Engineer

Kassim Alkanani
Senior Bridge Engineer

Chuck Dreesen
Construction Project Manager

Jamie King
Marketing Manager

Nathan Mascarenas
Senior Designer

Chris DeRosia
Senior Traffic Engineer

Alexandre Karami
Senior Consultant

Phillip O’Brien
Graphic Designer

Damon Howard, EI
Engineer Intern

Joey Davidson
CADD Specialist

Tracy Christy
Marketing Assistant

Karl Kiselev
Project Controller

Saeed Sobhi
Transportation Systems Management

Hamideh Etemadnia
Sr. Transportation & ITS Support

Mark Farris, PE
Sr. ITS Traffic Engineer

Steve Howard, PE
Senior Structural/Construction Engineer

Wilson Moy, PE
Professional Engineer

Ted Morris
Construction Project Manager

Carol Skelton, PE
Project Engineer

Shawn Dankenbring, PE
Water Resources Group Manager

Jason Okerlund
Construction Inspection Tech

Pattie Ray
Senior Inspector

Denver Projects

Denver Careers

Denver News

EST Bridge Group On Site Visit to Plum Creek

EST Bridge Group On Site Visit to Plum Creek

Denver’s bridge group took a trip to visit one of our many, current local projects at Plum Creek! They were on-site to provide QA inspection of the Scott Road Bridge over Cherry Creek BT-42 girders being cast that day. Designed by EST for a land development project in...

APWA Golf Tournament

APWA Golf Tournament

Three weeks ago the EST team Jason Okerlund, Dave Knight, and Karl Brauer along with Randy Mourning, Public Works Director from the City of Sheridan, took part and won the 2018 American Public Works Association (APWA) Colorado Chapter Golf Tournament at the Lone Tree...

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Corporate Headquarters

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

(405) 815-3600

(405) 815-4080