Senior Flight Dynamics Engineer: Trajectory & Design

Firefly Aerospace; Cedar Park (TX); On-site; USD 140,000 - 210,000; Full time

Benefits offered by this job

Health benefits

Parental leave

Educational reimbursement

Flexible PTO

Job summary

Firefly Aerospace is seeking a Senior Flight Dynamics Engineer to design and optimize spacecraft trajectories for LEO and cislunar missions. You will develop targeting algorithms, create error budgets, and serve as a flight dynamics operator, collaborating with cross‑functional teams to translate mission designs into executable operations.

The role combines advanced mission design with hands‑on operational support and mentoring of junior engineers in a fast‑paced, mission-critical environment.

Qualifications

• Bachelor's degree in aerospace engineering, physics, mathematics, or related field.
• 5-8 years of experience in spacecraft flight dynamics with significant depth in mission design or maneuver planning.
• Experience supporting operational spacecraft missions through multiple mission phases.
• Advanced understanding of orbital mechanics theory and applications.
• Understanding of spacecraft attitude control and its impact on maneuver execution accuracy.
• Strong understanding of targeting and optimization methods.
• Knowledge of estimation theory and uncertainty modeling.
• Experience in software development and modeling/simulation for spaceflight applications.
• Working knowledge of Python and Linux.
• Proficiency with one or more commercial trajectory design software tools (STK, FreeFlyer, GMAT, or similar).
• Excellent communication and presentation skills.
• Advanced degree (master's or PhD) in aerospace engineering, physics, mathematics, or related field.
• Expert-level proficiency in STK for spacecraft trajectory design.
• Python proficiency and experience with JPL's MONTE software suite.
• Software engineering expertise including skills in version control (Git), code review, automated testing, documentation, and CI/CD workflows.
• Comprehensive knowledge of spacecraft subsystems and their impact on trajectory design and maneuver planning.
• Proven ability to mentor and develop junior engineers while managing technical responsibilities.

Responsibilities

• Optimize spacecraft trajectories to satisfy mission requirements while balancing delta‑V budgets, mission duration, and payload constraints.
• Design and maintain mission designs from the conceptual phase through the end of spacecraft mission operations.
• Develop algorithms to target maneuvers that achieve spacecraft mission objectives.
• Create maneuver error budgets and perform sensitivity analysis to assess robustness to execution uncertainties.
• Formulate and analyze contingency maneuver plans and abort scenarios for off-nominal conditions.
• Interface with cross‑discipline teams to translate maneuver plans into executable command sequences and operational procedures.
• Serve as a flight dynamics operator for spacecraft missions and perform maneuver reconstruction to improve spacecraft models.
• Perform verification and validation of flight dynamics models and software using analytical solutions, benchmarks, flight data, and unit tests.
• Author technical documentation and analysis reports that communicate flight dynamics concepts and results to diverse audiences.

Skills

Trajectory optimization

Maneuver planning

Python programming

Linux

Cross‑functional collaboration

Communication skills

Mentoring

Software development

Orbital mechanics

Education

Bachelor's in aerospace engineering

Advanced degree (MS/PhD)

Tools

STK

GMAT

FreeFlyer

MONTE

Git

CI/CD workflows

Python libraries for simulation

Job description

Firefly Aerospace is seeking a Senior Flight Dynamics Engineer to design and optimize spacecraft trajectories for LEO and cislunar missions. You will develop targeting algorithms, create error budgets, and serve as a flight dynamics operator, collaborating with cross‑functional teams to translate mission designs into executable operations.

The role combines advanced mission design with hands‑on operational support and mentoring of junior engineers in a fast‑paced, mission-critical environment.