Senior Modeling & Simulation Engineer: National Security Missions (Aerospace)

TL;DR

Senior Modeling & Simulation Engineer: National Security Missions (Aerospace): Build mission-level modeling and simulation capabilities for large spacecraft and classified national security missions with an accent on constellation performance, spacecraft subsystem models, and mission assurance. Focus on designing multi-agent simulations, modeling contested environments, analyzing on-orbit anomalies, and extending vehicle control software across the stack.

Location: On-site in Los Angeles, California, in a secure environment; U.S. citizenship and an active TS/SCI clearance are required.

Salary: $160,000–$200,000 base salary plus equity.

Company

hirify.global is a Series C aerospace startup developing high-power satellite platforms for commercial and U.S. government missions from low Earth orbit to deep space.

What you will do

• Develop mission-level models and simulations for national security space missions, including operational objectives, environments, and constraints.
• Model constellation capabilities such as network coverage, beam planning, and resilience in contested environments.
• Create simulation infrastructure and physics-based models for propulsion, attitude control, power, and communications systems on 20kW+ spacecraft.
• Develop rapid-deployment software tools, support subsystem integration and testing, and investigate on-orbit anomalies.
• Set technical direction, review designs and code, and mentor other engineers.

Requirements

• Active TS/SCI clearance, or TS/SCI held within the last 12 months, plus U.S. citizenship.
• Current or previous Special Access Program access and experience working on classified national security programs in secure or SCIF environments.
• Bachelor’s degree in physics, aerospace, mechanical or electrical engineering, computer science, mathematics, or another STEM field.
• At least 5 years of professional modeling and simulation experience.
• Professional development experience with Rust, C++, or a similar compiled language, plus scientific Python, Julia, MATLAB, or equivalent.
• Ability to own complex systems end-to-end and guide the work of other engineers.

Nice to have

• Master’s or PhD in a relevant STEM discipline.
• Mission-level or campaign-level modeling and simulation experience for defense or national security applications.
• Production Rust, simulation system design, Monte Carlo methods, probability and statistics, linear algebra, controls, or orbital mechanics experience.
• Experience with space communications modeling, RF, ground stations, Linux, electronics, computer architecture, or CI/CD systems.

Culture & Benefits

• Fast-paced environment at a Series C space startup with multiple launches planned through 2026 and 2027.
• Paid time off, medical, dental, and vision coverage.
• Life insurance and paid parental leave.
• Equity participation and additional company benefits.
• Equal opportunity employment and reasonable accommodation support.