Spacecraft represent the most pressing unmet need across the entire aerospace industry. As more launch vehicles come online and the cost to orbit decreases, more companies launching payloads to space continue to emerge.

For the first time in history, this influx of payload companies combined with reduced launch costs has resulted in a massive increase in need for commercial spacecraft platforms, known as satellite buses. These buses hold the payloads of our customers and are flown on launch vehicles.

Apex manufactures these satellite buses at scale using a combination of software, vertical integration, and hardware that is designed for manufacturing. Our spacecraft enable the future of society: ranging from earth observation to communications and more.

We’d love for you to join us on our mission of providing humankind access to the galaxy beyond our planet.

About the Role

Apex is seeking a Senior Chemical Propulsion Engineer to join our closely integrated team, driving the development of our chemical propulsion systems to meet the requirements of our spacecraft bus. You will have the opportunity to approach this from a clean-sheet design, guiding propulsion system architecture, integration, and testing to ensure optimal performance. You will also be the first chemical propulsion engineer at Apex Space, and will help build our chemical propulsion capabilities, team, and infrastructure from the ground up.

Responsibilities

Design, build, and test chemical propulsion systems

Design and build propulsion infrastructure and test facilities

Design propulsion system architecture, develop product

specifications, and maintain Technical Performance Metrics (TPMs)

Develop qualification and acceptance test plans and support said

testing

Collaborate with cross-functional teams to integrate propulsion

systems with other subsystems (e.g., electrical, thermal, structure).

Troubleshoot anomalies that arise during manufacturing, lead

investigation efforts, and ensure design for manufacturability (DFM)

approaches are followed during all stages of development

Directly interface with customer/supplier relationships, conduct

analyses, and provide support (either virtual or onsite) as necessary.

Contribute to proposals and business development efforts as needed.

Requirements

U.S. Person status is required as this position needs to access export controlled data.

Bachelor's degree in mechanical, propulsion, or other aerospace-related engineering discipline.

8+ years of propulsion design and test experience

Experience with mono and bi-propellant chemical propulsion systems

Experience with handling and testing pressurized systems

Demonstrated history of designing fluidic systems, fluid system

instrumentation, and control components (i.e. tanks, regulators, pressure transducers, thermocouples, solenoid valves, etc.)

Experience with CAD software (NX, SolidWorks)

Working knowledge for manufacturing in a clean environment and following AS9100 protocols

Preferred Qualifications

Master's or Ph.D in mechanical, propulsion, or other aerospace-related engineering discipline

Experience operating leak, burst, proof test facilities

Experience leading an hot-fire test campaigns (power and fluid delivery systems for ground test, data acquisition systems, thrust stands, and plume diagnostics).

Experience with chemical propulsion operations in space

Why Join Apex?

Apex believes in creating a work environment that you look forward to embracing every day. Our employees love working at Apex, and we want you to love it too. We're a fast-growing startup that has raised more than $500M in funding, and we invest heavily in our people from day one.

What We Offer For Full-time Employees

Shared upside: Receive equity in Apex, letting you benefit from the work you create

Best-in-class healthcare: 100% company-paid medical, dental, and vision for you and your dependents, plus $100k life insurance at no cost

Comprehensive PTO package: Starting at 15 days vacation, growing to 20+ days annually, plus 10 paid holidays

Competitive 401(k) plan: Generous matching - 100% match on first 3%, 50% on next 2%