Wait…
The role
SSI is seeking a Modeling Simulation Software Engineer for a role in El Segundo, CA.
What you will do
- Be a member of a fast-paced multidisciplinary mission operations modeling, simulation, and analysis team informing the United States Space Force acquisition decision process.
- Your background and interest in simulation development will be highly valued in developing and testing simulation applications. You'll be integrating mission simulation tools into an automated system-level trade study execution architecture.
- You will have a strong hand in defining requirements, specifying designs, and implementing an ever-growing portfolio of space mission operations analysis simulations and trade studies.
Bachelors degree in aerospace, astronautics, mathematics, or physics and fourteen (14) years of experience with:
At least one programming language: MATLAB, Python, Java, C#, or C++.Live, virtual, and/or constructive (LVC) simulation techniques and technologies.Simulation development experience with simulation environments such as STK, AFSIM, GMAT, or FreeFlyer.MATLAB and/or Simulink or other simulation scripting languages.Preparing and delivering presentations and technical demonstrations.Satellite orbital mechanics & maneuvers, remote sensing, spacecraft launch/command/control, and/or satellite communications.Equivalent experience with airborne systems is applicable to this role.Managing files & directories, network file sharing, installing software & licenses, and command line shell (Windows Cmd or Bash).Active TS clearance with in-scope T5/SSBI is required, along with SCI eligibility and participation in Continuous Evaluation.Must meet all requirements for SCI and SAP access and be willing to undergo a polygraph examination.Travel is 10%Nice to have
- Simulation software development, test, and integration experience in a team environment. Use of Agile methodology and Atlassian Jira are beneficial.
- Prior industry experience in aerospace or space & defense.
- Systems engineering, with experience defining and executing trade studies. Engineering methodologies such as Model-Based Systems Engineering (MBSE), Multidisciplinary Design Analysis Optimization (MDAO), or Model-Based Design are a plus. Demonstrated knowledge of supporting toolsets such as Cameo Enterprise Architect, Sparx Systems EA, or Ansys ModelCenter would be helpful.
- Participation in engineering peer reviews, both as a developer and as a reviewer.
- Advanced degree in engineering with emphasis on applications to space launch, orbit propagation, and maneuvering.
- Professional certification (e.g., Professional Engineer, INCOSE CSEP, ITEA CTEP, Agile PM/PO, OMG OCSMP, etc.).
About Space Systems Integration
Space Systems Integration (SSI) is a fast-growing engineering company that provides aerospace solutions to a variety of government and commercial customers. Our employees are forward-thinking, self-directed individuals who are committed to solving our customers’ technical challenges.
Legal notes
Space Systems Integration provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, or any other characteristic protected by federal, state, or local laws.
Similar jobs at other companies
- NF
Pay not posted
Posted 27 days ago

$174K–$225K / yr
Posted Oct 1, 2026
- CS
$120K–$150K / yr
Posted Nov 10, 2024
- CI
Pay not posted
Posted Nov 10, 2024
- KS
K2 Space Los Angeles, CA +1
$160K–$200K / yr
Posted 10 days ago
- NF
NextGen Federal SystemsColorado Springs, Colorado
Pay not posted
Posted Sep 17, 2026
Source: the Space Systems Integration Lever job board. We last checked this job 1 h ago. We first saw it 3 days ago. A job on a job board does not always mean that the team interviews people now. We found this job board in a public list. We did not yet compare it with the careers page of the company.
- Open tech jobs
- 9
- With posted pay
- 78%
- Median posted base
- $180K–$230K