Senior Engineer,Propulsion Systems Job Longmont area,Colorado USA,Engineering

The future of aerospace and defense starts here. Ursa Major was founded to revolutionize how America and its allies access and apply high-performance propulsion, from hypersonics to solid rocket motors, satellite maneuvering and launch. We design and deliver propulsion and defense systems that solve the most urgent and critical national security demands.

Ursa Major is seeking a Senior Engineer, Propulsion Systems to support the technical definition, integration, and execution of propulsion systems for hypersonic vehicles. The role is a hybrid, 2-days per week remote or on-site, out of Berthoud, Colorado.

Key Responsibilities

Clean sheet design and analysis of fluid & mechanical vehicle components including tanks, feed systems, propellant management, and fluid systems
Support rapid development cycles of new designs and changing requirements including testing, data analysis, and hands‑on hardware work
Design modifications of existing components and prototypes to increase performance, improve manufacturability or resolve limitations
Collaborate with the manufacturing, analysis, and test teams to reduce part‑to‑part variation and discrepancies
Assemble and test first‑article prototypes
Lead propulsion subsystem architecture and requirements definition for hypersonic vehicles
Own subsystem‑level propulsion trades, performance margins, and integration decisions
Serve as the technical authority for propulsion interfaces with vehicle structures, thermal, avionics, GNC, and mission engineering
Develop and manage propulsion requirements, verification plans, and compliance evidence
Collaborate closely with vehicle and systems engineers to ensure mission and performance alignment
Support ground test and flight test planning, execution, and post‑test data analysis
Identify propulsion system risks and drive mitigation strategies across design, manufacturing, and test
Provide technical leadership and mentorship to early‑ and mid‑career engineers
Support customer technical reviews, design reviews, and technical interchange meetings
Contribute to proposal development, including technical approaches, architectures, and risk posture

Required Qualifications

Bachelor’s degree in Aerospace Engineering, Mechanical Engineering, or related field
8+ years of experience in propulsion systems engineering or propulsion‑focused vehicle development
Demonstrated experience supporting hypersonic, missile, or high‑performance aerospace vehicles
Strong understanding of:
- Propulsion system architecture and integration
- Vehicle‑level performance and propulsion impacts
- Requirements development and verification
Experience working across disciplines in a systems engineering environment
Demonstrated proficiency with computer‑aided design and drafting
Experience with geometric dimensioning and tolerancing per ASME Y14.5
Working knowledge of and hands‑on experience with fluid, mechanical, and electrical systems
Strong understanding of industry standards and requirements
Desire to take ownership and help wherever needed on the team
Able to delegate tasks and lead large project scope
Ability to work in a fast‑paced environment and stay flexible based on customer demands and company priorities along with daily firefighting
Ability to make sound technical decisions under schedule and performance pressure
Strong written and verbal communication skills
Ability to obtain and maintain a U.S. Security Clearance

Preferred Qualifications

Master’s degree in Aerospace Engineering or related field
Experience with hypersonic propulsion architectures (e.g., SRM, liquid rocket, advanced boost systems)
Experience supporting flight test or demonstration programs
Familiarity with thermal, structural, and aero integration challenges in hypersonic regimes
Experience in design and analysis of fluids systems
Experience operating in ISO 9001 or AS9100 certified organizations
Experience with SMC‑S‑016 Test Requirements
Demonstrated proficiency with fundamental manual or CNC machining equipment and processes (milling, turning)
Experience with fluids, structural and thermal analysis using Ansys software
3+ years of PTC Creo or Siemens NX CAD programs and Windchill PLM software
Liquid propellant rocket…