Principal Software Engineer - Advanced Simulation & Training Systems; Onsite

Principal Software Engineer – Advanced Simulation & Training Systems (Onsite)

Position located in Sterling, VA, within the Strategic Defense Solutions (SDS) business area at Collins Aerospace, a division of RTX.

RTX is a leader in aerospace and defense, focused on delivering advanced simulators and training systems for military and commercial customers.

We are searching for an experienced Principal Software Engineer to join our team and serve as a technical subject matter expert for the design, implementation, and testing of complex multi‑platform training device software and user interfaces. The role requires rapid assimilation of complex systems, customer interaction, and leadership in a classified lab environment with daily onsite presence.

• Design, develop, integrate, and test software on cross‑functional agile teams to deliver solutions within budget, scope, and schedule constraints.
• Exhibit ownership of and accountability for committed objectives.
• Assist in analysis and decomposition of features.
• Make and influence decisions which impact cost, schedule, and technical performance at a program level.
• Serve as a highly motivated software development focal point, driving strong technical solutions and decision making.
• Perform multi‑threaded software debugging.
• Work independently with limited supervision.
• Mentor early‑career engineering peers to advance their ability to contribute to team objectives.
• Demonstrate leadership qualities in everyday work, recognize peers’ accomplishments, and help onboard junior team members.
• Conduct and lead bidding and proposal activities to support acquisition of new business.
• Contribute to software and systems engineering requirements capture and analysis.
• Travel to domestic and international customer sites to support training events and product installations.

• STEM degree with a minimum of 8 years of relevant experience, or an advanced degree with a minimum of 5 years of experience.
• Active and transferable U.S. government‑issued security clearance (Secret) required prior to start date; U.S. citizenship is mandatory.
• Prior experience working with C++.
• Experience with agile development practices and general software engineering design principles.

• Experience with training simulations.
• Familiarity with training and avionics protocols such as ARINC 429, ARINC 610, MIL‑STD‑1553, etc.
• Excellent written and oral communication skills.
• Familiarity with Windows and Linux development environments.
• Leadership qualities and willingness to share knowledge.
• Experience using Visual Studio.
• Familiarity with Dev Sec Ops  and Agile development methodologies.
• Strong OOP and C++ language skills including STL and templates.
• Familiarity with scripting languages (Python, Perl, etc.).
• Experience with source code control tools (Git, SVN, Clear Case, etc.).
• Experience with ALM tools (JIRA, Confluence, Crucible).
• Experience with Git Lab CI/CD within software development processes.

• Medical, dental, and vision insurance.
• Three weeks of vacation for newly hired employees.
• Generous 401(k) plan with employer matching and a lifetime income strategy option.
• Tuition reimbursement program.
• Student loan repayment program.
• Life insurance and disability coverage.
• Optional coverages such as pet insurance, home and auto insurance, and additional life and accident insurance.
• Birth, adoption, and parental leave benefits.
• Health, fertility, and family planning support.
• Adoption assistance.
• Autism benefit.
• Employee assistance plan with up to 10 free counseling sessions.
• Wellness incentives and rewards program.
• Virtual doctor visits and doctor on demand.
• Child and elder care services.
• Relocation assistance eligibility.

Salary range: $118,300 – $224,900 USD. The range reflects all experience levels and may vary based on location, education, and key skills.

RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status, and provides affirmative action for qualified individuals with disabilities and protected veterans in compliance with federal law.