Propulsion Senior Engineer – Pressure & Fluid Systems

Cimarron Software Services, Inc.; Houston (TX); On-site; USD 125,000 - 220,000; Full time

Benefits offered by this job

Major Medical and Hospitalization

Vision Care

401(k) with Company Matching

Education Reimbursement

PTO and Holiday Leave

Wellness Program

Job summary

Cimarron Software Services, Inc. seeks a Propulsion Senior Engineer – Pressure & Fluid Systems to own end-to-end technical execution of bipropellant feed systems from requirements through flight readiness.

You will lead cross-functional teams and suppliers to meet safety, cost, and schedule targets while upholding configuration discipline. The role requires deep hands-on propulsion hardware experience and strong leadership, with 100% onsite work in Houston, TX.

Qualifications

• 7+ years of relevant experience in pressure control and fluid systems design.
• Hands-on propellant feed system design, development, qualification and integration (COPVs, valves, regulators, filters, manifolds, instrumentation).
• Expertise in fluid dynamics, thermodynamics and heat transfer applied to propulsion systems.
• Experience with oxygen compatibility requirements and assessments.
• Bachelor’s degree in Aerospace or Mechanical Engineering.

Responsibilities

• Owns end-to-end technical execution of spacecraft pressure control and fluid systems.
• Lead technical authority on system architecture and interface definition across development lifecycle.
• Perform modeling and simulations with GFSSP, ANSYS, Fluent to evaluate performance.
• Define and execute system and component level tests including development and qualification.
• Coordinate with external vendors on cost, schedule, and design verification.

Skills

Propulsion systems

Pressure control

Fluid systems design

Technical leadership

3D modeling

SolidWorks

System integration

Education

Bachelor's degree in Aerospace/Mechanical engineering

Tools

GFSSP

ANSYS

Fluent

Job description

Posting/External Job Title

Location

Houston, TX 77058 US (Primary)

Remote/Onsite/Hybrid

100% Onsite

Job Type

Full-time

# of Hires Needed

1

Education

Bachelor's Degree

Travel

None

Security Clearance Required

None

Pay Range (All offers will be based on experience)

$125,000.00 - $220,000.00/yr

Position Introduction/Key Duties

Cimarron is seeking aPropulsion Senior Engineer – Pressure & Fluid Systems who willown the end-to-end technical execution of a bipropellant feed system from requirements definition through design, build, integration, test, and flight readiness. You will lead cross-functional teams and suppliers to deliver to aggressive cost and schedule targets while maintaining safety and configuration discipline. The ideal candidate combines deep hands‑on propulsion hardware experience with strong technical leadership, clear communication, and a bias for execution. This position is 100% onsite located in Houston, TX.

Key Duties:

• Owns the end-to-end technical execution of spacecraft pressure control and fluid systems – including COPVs, flow control devices (valves, regulators, manifolds, filters) from requirements through design, build, integration, test and flight readiness.
• Serve as a subject matter expert in propellant feed system and pressurization system design, providing technical authority on system architecture, component selection, and interface definition across the development lifecycle.
• Perform detailed modeling, analysis and simulation of fluid systems using tools such as GFSSP, ANSYS, Fluent to evaluate system performance, fluid dynamics, thermal effects and transient behaviors.
• Perform detailed sizing and selection of fluid system components, ensuring compatibility with performance, environmental, material and other requirements.
• Define, plan, and execute system and component level tests including development, qualification and acceptance testing anchor analytical models and validate simulations against test data.
• Lead and participate in internal and external design and gate reviews, trade studies and subassembly integration activities; ensure compliance with system requirements and program milestones.
• Coordinate and manage technical requirements and design certification activities with external vendors and suppliers, interface on cost, schedule, design, manufacturing and acceptance.
• Define and control functional and physical interfaces between the fluid/pressure systems and vehicle level systems, collaborating with structures, thermal, avionics, and software teams.
• Provide technical mentorship and guidance to less experienced engineers.
• Responsible for delivering against safety, cost, and schedule targets.

Required Skills, Experience, and Education:

• Due to facility security requirements, only U.S. citizens or permanent residents are eligible for consideration at this time.
• Ability to complete a pre-employment background check and drug screening, which will include but is not limited to testing for marijuana use.
• Must be willing to work evenings and weekends as needed to meet critical project milestones.
• 7 or more years of relevant experience with demonstrated depth in pressure control and fluid systems design.
• Significant hands‑on experience with propellant feed system design, development, qualification and integration, including COPVS, valves, regulators, filters, manifolds and instrumentation.
• Expertise in fluid dynamics, thermodynamics and heat transfer with demonstrated application to propulsion systems.
• Experience with oxygen compatibility requirements and assessments.
• Experience coordinating with external vendors on technical requirements, design verification, cost and schedule performance.
• 3D modeling software experience: SolidWorks preferred.
• Bachelor’s degree from an accredited college or university in Aerospace, Mechanical or related Engineering discipline required.

Desired Skills, Experience, and Education:

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.

Resumes should list employment dates in month/year format (e.g., January 2020 – March 2024) for each position to meet customer and contract documentation requirements.

Cimarron offers an outstanding Benefits Package including:

• Major Medical and Hospitalization
• Vision Care
• Preventive Care
• Ancillary Benefits
  • Life Insurance and AD&D
  • Short-Term Disability Insurance
  • Voluntary Long-Term Disability Insurance
  • Voluntary Additional Life and Dependent Life Insurance
• 401(k) with Company Matching
• Flexible Spending Accounts
• Direct Deposit
• Other Benefits
  • Paid Time Off (PTO) and Holiday Leave
  • Education Reimbursement
  • Wellness Program

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