Senior Mechanical Engineer

Senior Mechanical Engineer — Spacecraft Mechanisms

Cimarron is seeking a Senior Mechanical Engineer - Spacecraft Mechanisms to lead the development of our state-of-the-art mechanical separation and interfacing systems across the full product life cycle. You will own moving mechanical assemblies including deployables, actuators, landing legs, latches, hinges, and release and separation systems from initial requirements and clean-sheet concepts all the way through design, analysis, prototype, qualification, and integration for our Blue Ghost Lunar Lander and Elytra vehicles. This is a full hardware-ownership role for an engineer who thrives on real-time decisions, fast data-driven iteration, and seeing their hardware fly. This position is 100% onsite located in Cedar Park, TX.

Key Duties:

• Own the entire hardware lifecycle for a variety of moving mechanical assemblies and structures, from concept through qualification and flight.
• Develop, scrub, and maintain requirements for responsible mechanisms.
• Lead configuration development and trade studies, optimizing for mass, cost, schedule, safety, and performance — making clear recommendations even with partial information.
• Perform conceptual design and first-order analysis — including strength, sizing, kinematics, and mechanism margin (torque/force ratio) calculations — supported by hand calcs and FEA.
• Generate CAD models, manufacturing drawings, specifications, and supporting documentation.
• Rapidly iterate on designs and manufacturing processes through development testing in a fast-paced environment.
• Support production implementation and on-site build verification, partnering with build engineers and technicians to improve designs.
• Define and execute hardware development, qualification, and acceptance test campaigns, and interpret test data (thermal, vibration).
• Lead design reviews internally and with suppliers and customers (e.g., NASA, U.S. Space Force), and demonstrate compliance with relevant launch jurisdiction standards.
• Support Business Development with proposals and mission concepts, and manage development schedules, vendors, and budgets.
• Provide technical guidance and mentorship to junior mechanisms engineers, and collaborate with the team to continuously improve design, analysis, and test processes.

Required Skills, Experience, and Education:

• Due to facility security requirements, only U.S. citizens or permanent residents are eligible for consideration at this time.
• 5 or more years of experience.
• Experience sizing and designing motors for spacecraft applications
• Familiar with instrumentation and functional test setups for mechanisms
• Hobby level understanding or better of basic machine shop setups for prototyping (mill/ lathe operation, etc)
• Strong design and integration skills using 3-D CAD software (Siemens NX preferred).
• Experience with industry FEA/FEM tools such as Nastran, ANSYS, or FEMAP.
• Experience designing and analyzing composite and metallic structures.
• Strong grasp of first principles across multiple disciplines (mechanical, structural dynamics, materials, fluids/thermodynamics, electrical) and structural failure modes of complex mechanical systems.
• Solid understanding and application of GD&T (ASME Y14.5).
• Bachelors degree in aerospace or mechanical engineering and 5+ years of demonstrated professional experience in aerospace or a related mechanical engineering field.

Desired Skills, Experience, and Education:

• Master degree in aerospace or mechanical engineering and/or 8+ years of relevant experience.
• Previous experience with launch vehicle or spacecraft mechanisms (deployables, landing legs, separation systems, latches, hinges, actuators).
• Working knowledge of tribology, bearing selection, lubrication, and mechanism life/margin analysis.
• Working knowledge of composite manufacturing methods, material selection, and testing.
• Experience developing physical tests to validate analysis and evaluate assumptions, and interpreting thermal/vibration test data.
• Familiarity with aerospace-standard analysis methods (Bruhn, Niu, Roark, Shigley's, etc.).
• Working knowledge of at least one computer/scripting language (Python, MATLAB) at the professional or hobbyist level.
• Leadership experience on an engineering or project team.

Business Profile:

Cimarron is a global solutions company with a strategic partnering approach to satisfying customer-driven requirements. We ensure customer success with a modern approach and experienced leadership. Driven by an entrepreneurial spirit, Cimarron is fueled by highly skilled employees, developing new innovative technologies, and delivering superior products and services. We believe in recognizing employees' worth by offering competitive salaries and benefits, including health, dental, and vision insurance, 401(k) contributions, educational reimbursement, and much more. From company communication through Company-wide information meetings led by our President and CEO, to an Awards program designed to recognize our amazing employees and their accomplishments, you will not only feel like you are a part of a team, you will be a valued member of the Cimarron family. Cimarron is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, age, sex, sexual orientation, gender identity, religion, national origin, disability, veteran status, or any other characteristic protected by federal, state, or local law.