Senior Propulsion Engineer

Voyager is an innovative space, defense, and national security technology company committed to advancing and delivering transformative, mission‑critical solutions. We tackle the most complex challenges to unlock new frontiers for human progress, fortify national security, and protect critical assets to lead in the race for technological and operational superiority from ground to space.

Forge the Future: Join Voyager Technologies

The future belongs to those who build it. At Voyager Technologies, we’re building technologies that protect lives, expand frontiers and prepare us for what’s next. And we’re doing that with people who are wired to solve, build, adapt and lead. These roles are not for the faint of heart.

You’ll help lay the foundation for humanity's future. Join a culture where innovation thrives, curiosity is rewarded, and impact is real. We’re a company of doers, thinkers and builders, united by purpose and grounded in reality.

If you want to put your skills to work where the stakes are real and the mission is bigger than any one person, forge the future with Voyager.

Job Summary

Voyager wants you to be a critical contributor in the Mojave, CA office to advance the development of propulsion systems for Voyager’s sub‑orbital VTVL vehicles. You will be responsible for working directly on all aspects of the propulsion systems, from initial component and system sizing through design, analysis, fabrication, and test. You will regularly report to the Propulsion Lead on progress, as part of a joint propulsion team collaborating with the Pittsburgh, PA office.

Job Responsibilities:

• Support the engineering team in the design and test of rocket propulsion systems using cryogenic propellants
• Size components of propulsion systems including combustion devices, valves, propellant feed lines, turbomachinery, tanks, and pressurization systems
• Design and analyze combustion device elements including injectors, combustion chambers, nozzles, gas generators, cooling channels, and related technology
• Build and run propulsion system fluid‑thermal models to predict component and system behavior
• Perform trade studies to guide design and operational decisions
• Lead the creation of hardware drawings to support manufacturing
• Create component specifications to guide vendor interactions and support procurement
• Develop test plans, execute tests, and post‑process results for component and system testing
• Contribute to and participate in technical readiness and safety reviews for testing activities
• Perform risk assessment and mitigation planning
• Write and present technical reports

Required Skills & Qualifications:

• B.S. in Mechanical or Aerospace Engineering
• 6+ years of relevant experience in rocket propulsion system development
• Experience with cryogenic propellants (liquid methane and liquid oxygen preferred)
• Experience in designing and analyzing high‑pressure fluid and/or pneumatic systems
• Proven capability to develop conceptual designs, perform trade studies, and down select to a design baseline

Desired Skills & Qualifications:

• M.S. in Mechanical or Aerospace Engineering
• Experience with a variety of cryogenic propulsion systems and various engine cycles
• Experience with Computational Fluid Dynamics (ANSYS Fluent or CFX preferred)
• Proficient in fluid/thermal software for rocket engine development (GFSSP, RTE, RPA) and for system level modeling (Amesim or Thermal Desktop)
• Familiar with CAD (SolidWorks preferred) and lifecycle management tools
• Ability to take ownership of and prioritize tasks in a fast‑paced environment with changing needs and requirements
• Experience with advanced rocket engine designs and concepts, especially RDRE’s
• Analytical/scientific programming (Python, C/C++, MATLAB, Fortran)
• Hands‑on fabrication skills and a willingness to be hands‑on with pathfinder hardware
• Rocket fuel handling equipment and operations, including safety requirements
• Experience with rocket turbopumps

Experience in pressure vessel design, fabrication, requirements, and/or qualification testing

• Experience with hypergolic liquid bipropellant engine systems, test facility design, assembly, and operation

The good faith base salary rangefor this role is $130,000 - $160,000 at the time of this posting. Where you fall within the range depends on your experience, skills, and location. This range reflects base salary only and does not include benefits or bonus/incentive. This range may be adjusted in the future.

Relocation assistance is provided for qualified candidates moving to Mojave, CA.

Voyager offers a highly competitive total compensation package designed to support the well‑being, growth, and success of our employees. Employees benefit from a flexible and comprehensive rewards program that supports both professional and personal well‑being.

• Flexible Time Off (FTO), empowering employees to take the time they need to recharge and maintain a healthy work‑life balance
• Comprehensive medical, dental, and vision coverage for employees and their families, with a significant portion of premiums covered by the company and many benefits paid at 100% for employees
• Flexible, affordable gym memberships with 12,700+ options nationwide, including 24 Hour Fitness, EoS Fitness, Crunch Fitness, Anytime Fitness, Blink Fitness, Chuze Fitness, and more! No long‑term contracts and FREE on‑demand workout videos before you enroll
• 401(k) retirement plan with a 50% company match on contributions up to 8%, supporting long‑term financial security
• Company wellness programs that support physical and mental well‑being
• Additional voluntary benefits and employee support resources
• The opportunity to work alongside a highly talented team in an innovative, mission‑driven environment

Voyager is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, national or ethnic origin, sex, sexual orientation, gender identity or expression, age, disability, protected veteran status, or other characteristics protected by law.

To conform to U.S. Government export regulations, including the International Traffic in Arms Regulations (ITAR) (22 CFR Parts 120–130) and the Export Administration Regulations (EAR) (15 CFR Parts 730–774), applicants for this position must be a U.S. Person: a US Citizen, a lawful permanent resident of the U.S., or a protected individual as defined by 8 U.S.C. § 1324b(a)(3). Applicants must be eligible to obtain any required export authorizations from the U.S. Department of State or the U.S. Department of Commerce.

Minority/Female/Disabled/Veteran

The statements contained in this job description are intended to describe the general content and requirements for performance of this job. It is not intended to be an exhaustive list of all job duties, responsibilities, and requirements. This job description is not an employment agreement or contract. Management has the exclusive right to alter the scope of work within the framework of this job description at any time without prior notice.

$130,000 - $160,000 USD

Voluntary Self-Identification

For government reporting purposes, we ask candidates to respond to the below self-identification survey.Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiringprocess or thereafter. Any information that you do provide will be recorded and maintained in aconfidential file.

As set forth in Voyager Technologies, Inc.’s Equal Employment Opportunity policy,we do not discriminate on the basis of any protected group status under any applicable law.

If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection.As a government contractor subject to the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measurethe effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categoriesis as follows:

A \"disabled veteran\" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service‑connected disability.

A \"recently separated veteran\" means any veteran during the three‑year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service.

An \"active duty wartime or campaign badge veteran\" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.

An \"Armed forces service medal veteran\" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.