08/2011
Tom Gilmore Appointed Director of Business Development at OnQuest

02/2011
OnQuest Appoints Dr. Roberto Ruiz as New President and COO

02/2011
OnQuest Receives ISO 9001 Quality Certification, Passes Stage 1 and Stage 2 Audits by QMI-SAI Global

08/2010
OnQuest Appoints Tom Gilmore as Regional Manager: Expands Reach in West, Midwest

07/2010
All OnQuest units on-stream at Garyville, largest refinery expansion in US

06/2010
Evergreen Oil Contracts with OnQuest to Rehabilitate Hot Oil Heater

05/2010
BP Awards Two Revamps in Australia to Born Canada


OnQuest Inc., is an industry leader in the design and engineering of process and furnace technologies for clients in the oil refining and petrochemical industries. We design, supply, and supervise construction of LNG, hydrogen, ammonia, and syngas plants, along with designing and installing high-performance furnaces, heaters, and related combustion and process technologies.

OnQuest has particular strength in lump-sum, turnkey EPC projects, assisting clients from conceptual design and engineering to procurement and project management. We also specialize in burner management systems, selective catalytic reduction units (SCRs) and thermal oxidizers, and we have particular expertise in revamping and refurbishing aging or damaged heater units.

We offer:

  • High-performance solutions - High-performance solutions - Our construction-focused designs promote efficiency in project execution, providing for shorter field schedules, reducing man-hours, and controlling costs. OnQuest is also ISO 9001-certified.
  • World-class engineering - Our professional engineers, designers, and process experts are deeply experienced in process applications, and the full range of direct-fired heaters and furnace designs.
  • Proven experience - OnQuest has completed projects ranging from full EPC for process plants to specialized furnace and heater designs worldwide. We have completed complex design and installation projects for clients in the refining and petrochemical industries worldwide—including every major petrochemical refiner.

With offices in California, in Calgary, Alberta, and in Houston, Texas, OnQuest serves clients worldwide. We also have representatives in offices in the Middle East, and in Europe, Asia, and the United States. The company is a wholly owned subsidiary of Primoris Corporation (NASDAQ: PRIM), one of the country's largest specialty construction and infrastructure companies.


Head Office
OnQuest, Inc.
180 East Arrow Highway
San Dimas, CA 91773

Tel. (909) 451-0500
Fax (909) 451-0499


Houston Office
10777 Westheimer Road
Suite 1100
Houston, TX 77042

Tel. (713) 260-9681
Fax (713) 260-9691


Northern Calif. Office
1875 Loveridge Road
Pittsburg, CA 94565-4110

Tel. (925) 586-9836
Fax (925) 432-2958


See all OnQuest locations.

© 2011 OnQuest, Inc. All Rights Reserved.