Principal Thermal Engineer

Principal Thermal Engineer Subcontractor

We are a leading defence organisation based in Stevenage, Hertfordshire, and we are currently seeking a Principal Thermal Engineer Subcontractor for an initial 12‑month contract.

Location: Stevenage, Hertfordshire.
Work arrangement: Hybrid – onsite 3 days per week.
Contract: 12 months, likely extension.
Hourly Rate: £50.00 per hour.
Overtime: Paid at time and a quarter for hours worked over the standard 37 hours per week.
IR35 Status: Inside IR35 (Umbrella).

• Take ownership of delivering packages of thermal analysis work.
• Provide mechanical analysis support to develop designs and deliver thermal performance evidence.
• Deliver analysis evidence in clear reports with firm conclusion statements.
• Participate in team meetings and design reviews.
• Manage workload against time schedules and report progress regularly to stakeholders.
• Collaborate with project stakeholders (internal and external).

• Degree qualified in a STEM subject.
• Proven ability to carry out thermal analysis through hand calculations and Finite Element methods (e.g. ANSYS).
• Experience in one or more of the following areas: conduction, convection and radiation on thermal response of systems; thermal analysis of electronics; MATLAB‑Simulink for thermal studies; CFD for thermal behaviour; scripting using MATLAB or Python.
• Ability to make quick/simple assessments to progress design activities efficiently.
• Self‑motivated, organised and strong problem‑solving skills with a capacity to take responsibility for delivery of work.
• Ability to work as part of a multidisciplinary team and independently.
• Strong verbal and written communication skills, with ability to network and influence internal and external customers.
• Relevant experience in an equivalent or comparable industry is advantageous.