Thermal Fluids Design Reliability Engineer

• Guide design of thermal, environmental control, and life support systems on a large scale space station.
• Cultivate Vast's understanding of thermal and fluids analysis considerations to drive design decisions.
• Lead the technical reviews providing clear, decisive guidance of mechanical design and analysis, manufacturing drawings, test plans, concept of operations, during milestone design reviews and major risk gates.
• Provide critical peer review and approval of hardware designs during design reviews, and of acceptance and qualification test campaigns
• Ensure that the Vasts design process & design criteria/requirements are being followed for flight, launch, and ground support systems.
• Set the standard for acceptance and qualification test completeness for flight systems, ensuring our test campaigns are robust, disciplined, and aligned with human-rated reliability.
• Bring deep engineering intuition to test campaigns, identifying risks early and helping teams converge on safe, resilient solutions.

• Architect Vast’s thermal fluids, environmental, and life support engineering standards, design guides, and review frameworks; build tools that enable fast, confident decision-making at all levels across the company.
• Develop design criteria, requirements, and verification approaches to support haven-1 design architecture
• Make engineering best practices accessible and actionable, especially for engineers moving rapidly under ambitious program timelines.
• Support and elevate engineering teams across the organization by bringing broad experience in design, build cycles, integration, and test.
• Turn organizational knowledge into lasting guidance by capturing lessons learned and strengthening future standards.

• Build and steward the processes that ensure engineering rigor at scale—ensuring designs meet standards, reviews are comprehensive, and changes are consistently implemented.
• Own and continuously refine design review templates, reliability checklists, and internal design guides.
• Track design maturity and compliance across the station and vehicle architecture, ensuring nothing slips through the cracks.
• Build tools, frameworks, and automation that empower engineers to explore design trade-offs and risks with clarity and speed.

Change and Configuration management:

• Work across all facets of the engineering organization to improve vehicle reliability.
• Partner with configuration and change management so that every update to flight hardware is intentional, reviewed, and fully understood.
• Drive technical trades for the vehicle and enable decisions backed by strong physics based engineering rational
• Coordinate between Change Management, Risk, and Engineering teams to ensure design revisions drive continuous improvement on the vehicle
• Partner with the internal software team to ensure system data, configuration details, and design decisions are well organized and accessible.

• Partner with the Risk management team to identify Risk, and drive design improvements with engineering to mitigate.
• Work with Risk Management and Engineering to quantify Risk and failure probability through rigorous engineering rational
• Drive FMEA and Fault tree analysis across all engineering systems to identify and drive down risk
• Drive best practices for traceability and verification & validation of design revisions to thoroughly document risk mitigations across flight, launch, and ground support systems.

• Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, Physics, or related Engineering discipline
• 6+ years of related professional work experience in responsible engineering, design ownership, systems integration, test engineering, or reliability-focused development.

• 10+ years of related professional work experience in responsible engineering, design ownership, systems integration, test engineering, or reliability-focused development.
• Experience in Responsible Engineering, Systems Engineering, Office of the Chief Engineer, or Reliability Engineering roles on complex aerospace systems.
• Hands-on experience designing, assembling, integrating, or testing hardware.
• Background with spacecraft, aircraft, launch vehicles, or other mission- or safety-critical systems.
• Familiarity with fracture control, reliability methodologies, or human-rated hardware standards.
• Experience creating engineering standards, review templates, or technical guidance frameworks.
• Strong scripting and data analysis skills (Python, MATLAB, Excel) and familiarity with visualization tools (e.g., Tableau).
• Knowledge of manufacturing processes, materials selection, and hardware qualification pathways.
• Strong systems-level intuition and the ability to anticipate and articulate risks early.

• Willingness to work overtime, or weekends to support critical mission milestones.

COMPENSATION AND BENEFITS Base salary will vary depending on job-related knowledge, education, skills, experience, business needs, and market demand.

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.

U.S.

EXPORT CONTROL COMPLIANCE STATUS The person hired will have access to information and items subject to U.S. export controls, and therefore, must either be a “U.S. person” as defined by 22 C.F.R. § 120.62 or otherwise eligible for deemed export licensing.

This status includes U.S. citizens, U.S. nationals, lawful permanent residents (green card holders), and asylees and refugees with such status granted, not pending.

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.