Thermal Systems Engineer (Aerospace)

Location: San Francisco, United States; in-office five days per week

Salary: $150K–$225K per year

Company

hirify.global is an aerospace company developing integrated airframe, propulsion, and flight operations technologies for sustainable supersonic transport and high-speed systems.

What you will do

• Own thermal management system design from concept through production, vehicle integration, flight qualification, and flight.
• Architect thermal systems and develop one-dimensional fluid network models for system behavior, transient response, and sensitivity analysis.
• Design and size pumps, heat exchangers, valves, regulators, and other fluid-system components.
• Analyze heat loads, conduction paths, and interface temperatures using hand calculations, CFD, and computational tools.
• Generate CAD models and detailed engineering drawings, apply GD&T, and lead design reviews.
• Build prototypes, establish test procedures, analyze test data, verify requirements, and diagnose thermal system issues.

Requirements

• 5+ years of hands-on experience in propulsion or similarly complex thermal environments.
• Proficiency in Siemens NX CAD modeling, drawing generation, and GD&T.
• Strong understanding of thermodynamics, heat transfer, and fluid behavior.
• Experience with CFD and one-dimensional thermal or fluid network modeling tools.
• Knowledge of instrumentation types and limitations, with the ability to anchor models using test data.
• Initiative, flexibility in a fast-paced environment, attention to detail, and a high standard of quality.

Culture & Benefits

• In-office work five days per week is an essential part of the role.
• Flat structure with broad engineering ownership and specialist depth.
• Medical, dental, and vision insurance, including Flexible Spending Accounts.
• 401(k) program and stock option plan.
• Self-managed flexible time off, PTO, paid holidays, and sick time.