Onquest

OnQuest provides global fired heater engineering and heater design, syngas reformers, waste heat recovery units, SCR systems, and heater revamp solutions.

Oil and Gas

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Headquarters: Tulsa, Oklahoma, United StatesSource: RevenueBaseRetrieved October 13, 2026
Employee range: 11 to 50Source: RevenueBaseRetrieved October 13, 2026
Founded: 2002Source: RevenueBaseRetrieved October 13, 2026
Published list appearances: 2 supported appearances ↗Source: RevenueBase lists

The company at a glance

What does Onquest do?

Its stated expertise includes crude, coker, and hydrotreater heaters; burner management systems; emissions reduction; energy optimization; and emergency support.

Based on the company’s public LinkedIn information, supplied through RevenueBase.

Who it serves

OnQuest serves the refining, petrochemical, hydrogen, ammonia, LNG, and energy industries.

What the business offers

Services & capabilities.

Heater design

OnQuest provides heater design to API 530 and API 560.

Source: LinkedIn company description · Retrieved October 13, 2026

Waste heat recovery units

OnQuest provides waste heat recovery units.

Source: LinkedIn company description · Retrieved October 13, 2026

Explore the business in context

Company lists.

Supported appearances on published RevenueBase lists, including available memberships beyond displayed rankings.

#9OF 23

United States

Chemical plant design engineers

Snapshot: October 8, 2026

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#15OF 25

United States

Chemical plant troubleshooting services

Snapshot: October 8, 2026

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Positions describe ordering within each source list. See how lists are built ↗

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Onquest

#9 Chemical plant design engineers

Snapshot: October 8, 2026

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  <img src="https://revenuebase.ai/companies/profiles/onquest/recognition-companies-chemical-plant-design-engineers-united-states-20261009-a4700b0e3ce7333f879c57307f633f98ae24b0e2c07e7a4ac323b275495faeb9.svg" alt="Onquest listed #9 on Chemical plant design engineers, October 8, 2026" width="220" height="319" style="max-width:100%;height:auto;" />
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Sources & data notes.

RevenueBase prepared this profile from the company’s public LinkedIn information and RevenueBase company data. These source records were retrieved on October 13, 2026. AI helped summarize these sources, with a separate automated check against the source text completed on November 3, 2026. Directory positions use company-contact counts from separate saved list snapshots dated October 8, 2026. How the company lists are built.

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