Senior Thermal Engineer, Lunar

Vast; City of Long Beach (NY); On-site; USD 147,000 - 249,000; Full time

Benefits offered by this job

Medical, dental, vision coverage for员工

Equity

Paid time off

Onsite meals

Job summary

Vast in Long Beach, CA is seeking a Senior Thermal Engineer, Lunar, to own the thermal architecture for crewed and uncrewed lunar hardware. You will define, analyze, and qualify radiators, fluid loops, heat pipes, MLI, coatings, and survival heating for the diurnal lunar cycle.

You'll lead end-to-end thermal design, model correlation, and the development of standards and margins for flight hardware, reporting to the SVP, Lunar Programs.

Qualifications

• Bachelor's degree in mechanical, aerospace engineering or physics is required.
• 6+ years of spacecraft thermal engineering experience is required.
• Demonstrated ability to design and analyze spacecraft thermal control systems.
• Experience building and correlating flight hardware thermal models.
• Experience with extreme-environment thermal design driving hot and cold cases.
• Familiar with thermal coatings, MLI, radiators, heat pipes, thermal straps, heater/thermostat.
• Comfortable working during early architecture phases.
• Experience with multiple thermal analysis tools (Thermal Desktop, SINDA/FLUINT, ESATAN).

Responsibilities

• Define the thermal control architecture for lunar surface elements, balancing passive, heat pipe, pumped fluid loop and storage options.
• Size and place radiators for lunar environment considering diurnal swings, albedo and IR loading.
• Own the survival thermal case through lunar night including heater budget and thermal mass strategies.
• Own habitat, airlock, and node thermal control including cabin temperature and humidity control.
• Develop and maintain detailed system thermal models and validate with Thermal Desktop or SINDA/FLUINT.
• Manage thermal budget with temperature targets across launch, cruise, descent, landed scenarios.
• Select coatings, MLI, heat pipes, thermal straps, isolators, heaters and RTDs for lunar environment.
• Plan and conduct TVAC and thermal balance test campaigns and correlate with models.
• Contribute to thermal design standards, margins and environment definitions for lunar hardware.

Skills

Spacecraft thermal engineering

Thermal control design & analysis

Flight hardware thermal modeling

Extreme-environment thermal design

Thermal coatings, MLI, radiators, heat

Early architecture phase experience

Thermal analysis tools (ThermalDesktop

TVAC/test planning (preferred)

Lunar/planetary thermal experience

Crewed vehicle thermal experience

Pumped fluid loop design

Dust effects on thermo-optical props

Education

Bachelor's degree in Mechanical Engineering, Aerospace Engineering, Physics or related technical discipline

Tools

Thermal Desktop

SINDA/FLUINT

ESATAN

Job description

Vast is developing next-generation space stations and space infrastructure using an incremental, hardware-rich, and low-cost approach. Vast is rapidly developing its multi-module Haven Station to ensure a continuous human presence in space for America and its allies, enabling advanced microgravity research and manufacturing, and unlocking a new space economy for government, corporate, and private customers. Haven Demo’s 2025 success made Vast the only operational commercial space station company to fly and operate its own spacecraft. Next, Haven-1 is expected to become the world’s first commercial space station when it launches in 2027, followed by additional Haven modules. Additionally, the company recently announced Vast Satellite, a high-power satellite product line leveraging its space station components and the heritage of Haven Demo.

Headquartered in Long Beach, California, and with more than 1,000 employees and over a billion dollars in private capital, Vast has built the facilities required to manufacture and operate America’s next space station. The company plans to develop future habitats and systems for the Moon and Mars, dedicated space stations for government partners, and other crewed systems that will unlock the expanding long-term space economy.

Vast is seeking a Senior Thermal Engineer, Lunar, reporting to the SVP, Lunar Programs, to own thermal architecture and analysis for Vast's lunar surface elements — a surface power station and a crewed habitat, airlock, and node designed to survive and operate through the full lunar diurnal cycle.

As one of the founding engineers on the Lunar team, you'll play an essential role in developing Vast's lunar ecosystem. In this role you will serve as the lead for thermal control of hardware destined for the lunar surface - defining, analyzing, and qualifying the radiators, fluid loops, heat pipes, MLI, coatings, and survival heating architecture that will keep crewed and non-crewed lunar systems alive. You will own the thermal architecture end-to-end, from first-order trades through model correlation and flight, and help establish the thermal design standards, margin policy, and environment definitions that Vast's lunar hardware will be built on.

This will be a full-time, exempt position located in our Long Beach location.

Responsibilities:

• Define the thermal control architecture for Vast's lunar surface elements - trading passive, heat pipe, pumped fluid loop, and thermal storage approaches against mass, power, complexity, and dust exposure
• Size and place radiators for the lunar surface environment, accounting for diurnal sink temperature swings, albedo and lunar IR loading, terrain and self-view blockage, and latitude-driven constraints
• Own the survival thermal case through lunar night - heater power budget, thermal mass and phase-change storage strategy, and dormancy and wake-up thermal states
• Own the habitat, airlock, and node thermal control - cabin temperature and humidity control, condensing heat exchanger, coolant loop architecture, and depress/repress thermal transients
• Build and maintain the detailed system thermal models, contribute reduced-order models to Vast's design, simulation, and validate against Thermal Desktop, SINDA/FLUINT, or equivalent
• Own the thermal budget: min/max predicted temperatures per component against qualification limits across launch, cruise, descent, landed day, landed night, and off-nominal conditions
• Select thermal coatings, MLI, heat pipes, thermal straps, isolators, heaters, and RTDs for the lunar environment, with explicit accounting for regolith dust deposition, abrasion, and UV degradation of end-of-life optical properties
• Plan and execute TVAC and thermal balance test campaigns (chamber and shroud requirements, solar and IR simulation, cold-case survival demonstration, test profiles and success criteria), then correlate models to test data
• Establish the thermal design standards, margin policy, and lunar environment definitions Vast's lunar hardware will be built on, and support design reviews, drawing checks, and NASA technical deliverables

Minimum Qualifications:

• Bachelor's degree in Mechanical Engineering, Aerospace Engineering, Physics or a related technical discipline
• 6+ years of spacecraft or aerospace thermal engineering experience
• Spacecraft thermal control design and analysis experience
• Built and correlated thermal models for flight hardware
• Experience with extreme-environment or wide-swing thermal design where both hot and cold cases were design-driving
• Familiar with thermal coatings, MLI, radiators, heat pipes, thermal straps, and heater/thermostat design
• Comfortable working during early architecture phases
• Experience across multiple thermal analysis tools (Thermal Desktop, SINDA/FLUINT, ESATAN, or equivalent)

Preferred Skills & Experience:

• TVAC and thermal balance test planning and execution experience, preferred
• Lunar or planetary surface thermal experience, including diurnal survival design (thermal switches) and regolith conduction modeling
• Crewed vehicle thermal experience: cabin ATCS, condensing heat exchangers, humidity control, ECLSS thermal interfaces, or touch temperature compliance for human-rated hardware
• Airlock, EVA systems, or suit thermal experience, including depress/repress thermal transients
• Pumped fluid loop design - working fluid selection, pump and accumulator sizing, freeze protection, and loop control
• Familiarity with lunar dust effects on thermo-optical properties and dust mitigation strategies

Additional Requirements:

• Willingness to work evenings and/or weekends to support critical mission milestones
• Ability to travel up to 5% of the time to support customer meetings

Pay Range: California

$147,000—$249,000 USD

We calibrate level and compensation to the selected candidate's experience and demonstrated capability. We welcome applicants across a range of experience levels to apply.

COMPENSATION AND BENEFITS

Base salary will vary depending on job-related knowledge, education, skills, experience, business needs, and market demand. Salary is just one component of our comprehensive compensation package. Full-time employees also receive company equity, as well as access to a full suite of compelling benefits and perks, including: medical, dental, and vision coverage for employees and dependents, generous paid time off; up to 20+ days of vacation for exempt staff and up to 10+ days of vacation for non-exempt staff with the ability to cash-out unused vacation annually, paid parental leave, short and long-term disability insurance, life insurance, access to a 401(k) retirement plan, ClassPass credits, personalized mental healthcare through Spring Health, and other discounts and perks. We also take pride in offering exceptional food perks, with snacks, drip coffee & onsite barista, cold drinks, and dinner meals remaining free of charge, and lunch subsidized as part of Vast’s ongoing commitment to providing high-quality meals for employees.

EQUAL OPPORTUNITY

Vast is an Equal Opportunity Employer; employment with Vast is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.