Sr Electric Propulsion Engineer

Astra’s mission is to improve life on Earth from space by creating a healthier and more connected planet. Today, Astra offers one of the lowest cost-per-launch dedicated orbital launch services, and one of the industry’s leading flight‑proven electric propulsion systems for satellites, the Astra Spacecraft Engine.

We are seeking a Senior Electric Propulsion Engineer to take ownership of significant areas of Hall‑effect thruster design, analysis, and test for spacecraft propulsion. This is a journey‑level position requiring complete knowledge of electric propulsion principles and practices. You will work independently with general direction, assess and resolve a wide range of technical challenges using sound judgment and creative problem‑solving, and provide guidance to more junior team members.

The ideal candidate has a solid foundation in plasma physics, thruster design, and electric propulsion systems and is ready to take responsibility for meaningful portions of our thruster programs while collaborating across mechanical, electrical, and systems teams.

• Thruster Design & Analysis: Take responsibility for significant elements of Hall‑effect thruster design, including discharge chamber geometry, magnetic circuit layout, cathode integration, and thermal management. Assess unusual design challenges and apply sophisticated analytical techniques to identify root causes and develop solutions.
• Performance Analysis: Conduct system‑level trade studies balancing thrust, efficiency, specific impulse, mass, power consumption, and lifetime, with a primary focus on LEO constellation missions and emerging higher‑power GEO applications. Devise solutions based on limited information and precedent where needed.
• Modeling & Simulation: Develop, apply, and maintain analytical and numerical models (plasma, thermal, structural, and electromagnetic) to predict thruster performance, adapting existing modeling approaches and suggesting variations to resolve issues.
• Test & Characterization: Plan and execute thruster test campaigns (anode efficiency, plume characterization, cathode coupling, thermal cycling, wear tests), correlating results against model predictions and using evaluation and judgment to select the right course of action when results deviate from expectations.
• System Integration: Collaborate with spacecraft systems engineers to define interfaces, verify requirements, and support the integration of propulsion subsystems into the vehicle. Resolve a wide range of integration issues creatively.
• Innovation & Continuous Improvement: Demonstrate creative thinking by evaluating advanced concepts (e.g., magnetic shielding, alternative propellants, improved channel materials) and creating and implementing effective design improvements to enhance performance, lifetime, and manufacturability.
• Guidance & Review: Provide guidance to junior engineers on the team, contribute to peer reviews of designs, and prepare technical reports, test plans, and design documentation for internal and external reviews.
• Mission Support: Support customer and mission‑level reviews by preparing propulsion performance data and trade study inputs for LEO constellation and GEO spacecraft programs.

• Bachelor’s or Master’s degree in Aerospace Engineering, Mechanical Engineering, Physics, or a related field.
• 5+ years of experience in spacecraft propulsion engineering, with hands‑on experience in electric propulsion hardware.
• Complete knowledge of Hall‑effect thruster design principles, including discharge chamber design, magnetic circuits, and cathode integration.
• Full understanding of plasma physics, ionized gas dynamics, and electric propulsion practices within the discipline.
• Hands‑on experience planning and executing thruster test campaigns, including performance, plume, and wear testing.
• Proficiency in one or more modeling and simulation tools (e.g., COMSOL, ANSYS, SPICE, MATLAB/Simulink, PIC codes, or equivalent).
• Demonstrated ability to work independently, assess diverse technical problems, and adapt existing approaches to resolve issues.
• Strong communication skills with the ability to…