Principal Thermal Engineer

Company: Certain Advantage

Location: Stevenage

Posted: May 1st, 2026

World Class Defence Organisation based in Stevenage, Hertfordshire is currently looking to recruit a Principal Thermal Engineer Subcontractor on an initial 12 month contract. Hourly Rate: £50.00 Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at 'time and a quarter'Location: StevenageHybrid / Remote working: The role will likely be onsite 3 days per week.Duration: 12 Months with very likely extension. Contracts are often ongoing and long-term thereafter. IR35 status: Inside IR35 (Umbrella)Interview process: One stage onsite interviewPrincipal Thermal Engineer Job Description:The Mechanical Analysis Group are looking for a Principal Thermal Engineer to join its team in Stevenage. The group consists of over 30 engineers working across a wide spectrum of cutting-edge military systems. Working for an internationally recognised company, you will play a critical role in ensuring that products deliver the necessary performance against key thermal requirements.Responsibilities:Skillset/experience required:
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