Senior Mechanical/Thermal Engineer

Location: Hybrid, Colchester office, United Kingdom

Company

hirify.global develops high-performance embedded computing solutions for defence, telecommunications, aerospace, and other demanding industries.

What you will do

• Own thermal architecture and design for complex, high-power electronic systems.
• Perform detailed thermal modelling using CFD and analytical methods, including thermal budgets and worst-case analysis.
• Develop and optimise forced-air, conduction-cooled, and hybrid cooling solutions across full environmental conditions.
• Design thermal hardware such as heatsinks, frames, cold plates, and enclosures, while creating and reviewing CAD models and engineering drawings.
• Lead thermal validation, instrumentation, testing, data analysis, and correlation between predicted and measured performance.
• Act as the thermal engineering subject-matter expert, influence system architecture, manage risks, and mentor junior engineers.

Requirements

• Significant experience designing thermal solutions for electronics or high-power systems.
• Strong CFD capability, including tools such as SolidWorks Flow Simulation, and a strong understanding of heat-transfer fundamentals.
• Hands-on mechanical design experience with strong SolidWorks and CAD skills.
• Experience with conduction- and air-cooled systems, production thermal/mechanical assemblies, tolerancing, interfaces, and manufacturing constraints.
• Ability to own designs from concept through production and collaborate with electrical, systems, and manufacturing teams.
• Ability to work in a hybrid arrangement from the Colchester office, United Kingdom.

Nice to have

• Experience with ruggedised or high-reliability systems in defence, aerospace, or industrial environments.
• Experience with heat pipes, vapour chambers, liquid cooling, or high-heat-flux systems.
• Exposure to coupled thermal-structural FEA and relevant environmental or industry standards.
• Mechanical or thermal engineering degree and Chartered status, or progress toward it.
• Experience supporting bids, proposals, or early concept work.

Culture & Benefits

• 25 days of holiday plus bank holidays and a holiday purchase scheme.
• Annual profit-share bonus and salary-sacrifice schemes for cycling, home and technology, and cars.
• Private health insurance, income protection, death-in-service benefit, employee assistance programme, and virtual GP.
• Enhanced parental leave and a company pension contribution of up to 10%.
• One paid volunteering day per year and access to the YuLife wellbeing app.

Hiring process

• Submit application details and a CV.
• Certain roles may require BPSS pre-employment screening due to security and export-control restrictions.