Senior Principal Software Engineer (Onsite)

RTX; Sterling (VA); On-site; USD 146,000 - 277,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Three weeks of vacation

401(k) match and retirement benefits

Relocation assistance

Job summary

RTX's Collins Aerospace SDS team in Sterling, VA seeks a Senior Principal Software Engineer to design and develop software models for a Mission Crew Trainer device, focusing on high-fidelity simulation and modelling for NC3 mission-system integration and crew training.

You will work in an Agile environment, mentor engineers, manage risks, and deliver technical demonstrations to stakeholders, ensuring software maturity and readiness for mission-critical operations.

Qualifications

• Experience with full software lifecycle processes from requirements to testing.
• Strong C++ and Python development experience.
• Active Secret clearance or ability to obtain one.
• Typically requires STEM degree and at least 10 years of relevant experience, or an advanced degree with at least 7 years of experience.

Responsibilities

• Serve as a Senior Principal Software Engineer on a simulation team developing models for a Mission Crew Trainer.
• Provide technical execution for design, development, integration, test, & validation to meet requirements.
• Drive software efforts to maturity and mentor junior/mid-level engineers.
• Work in an Agile program, manage planning, backlog, and coordination within the team.
• Identify risks and dependencies, report status to leadership, and present technical demos.
• Collaborate across Software, Hardware, and Mechanical domains to enable integration.

Skills

C++

Python

Mentoring

DoD program experience

Security clearance

Education

STEM degree

Job description

Date Posted:

2026-10-13

Country:

United States of America

Location:

US-VA-STERLING-291 ~ 22640 Davis Dr ~ DAVIS

Position Role Type:

Onsite

U.S. Citizen, U.S. Person, or Immigration Status Requirements:

Active and transferable U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance

Security Clearance Type:

Secret - Current

Security Clearance Status:

Active and existing security clearance required on day 1

Raytheon Company Managed by Collins Aerospace

Collins Aerospace, an RTX company, is a leader in technologically advanced and intelligent solutions for the global aerospace and defense industry. Collins Aerospace has the capabilities, comprehensive portfolio, and expertise to solve customers’ toughest challenges and to meet the demands of a rapidly evolving global market.

The Strategic Defense Solutions (SDS) portfolio is seeking a highly motivated and skilled Software Engineer professional to join our team in Sterling, VA. In this critical role, you will be part of an innovative team focused on designing and developing software solutions, directly ensuring our customers are prepared for the most vital missions.

Our Software Engineers work in an exciting, adaptive, and engaging environment enabling rapid learning to drive success.

This position will support the shaping of high-fidelity Simulation & Modelling efforts for enablement of NC3 Mission-System Integration and Crew Training for the armed forces.

Sign On Bonus Eligible

What You Will Do:

• Serve as a Senior Principal Software Engineer on a simulation team developing software models for a Mission Crew Trainer device.
• Provide technical execution experience required for design, development, integration, test, & validation of a system that complies with technical and performance requirements.
• Serve as a primary and important contributor to the team to drive software efforts to maturity.
• Work in an Agile program environment, supporting planning, backlog management, technical execution, and coordination within the Agile team.
• Identify and elevate risks, opportunities, and dependencies to ensure seamless program execution.
• Report execution status to program and functional leadership on a regular basis.
• Prepare and present technical demonstrations to key stakeholders to solicit product feedback & improvement.
• Mentor early-level & mid-level engineers through technical coaching, knowledge transfer, collaboration, and hands on guidance; fostering technical growth and preparing engineers for increased levels of responsibility.

Qualifications You Must Have:

• Deep familiarity with Software lifecycle processes for requirements, design, development, integration, test, and feature planning.
• Experience writing software in C++ and Python programing languages.
• Experience mentoring junior engineers to help enable domain-knowledge growth.
• Experience working on a team within a large DoD program.
• Active and transferable Secret U.S. government issued security clearance is required prior to start date.
• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 10 years prior relevant experience or an Advanced Degree in a related field and minimum 7 years of experience

Qualifications We Prefer:

• Experience with Simulation & Training engineering.
• Familiarity with engineering processes ranging from Software, Hardware, and Mechanical domains.
• Experience with Agile Development Methodologies (e.g. Scrum, SAFe), including backlog management, Agile metrics, and Scrum ceremonies.
• Experience communicating task status for Earned Value (EV) reporting or experience as a CAM.
• Familiarity with Radio Frequency (RF) communications concepts.

What We Offer:

Some of our competitive benefits package includes:

• Medical, dental, and vision insurance
• Three weeks of vacation for newly hired employees
• Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option
• Tuition reimbursement program
• Student Loan Repayment Program
• Life insurance and disability coverage
• Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance,critical illnessinsurance, group legal, ID theft protection
• Birth, adoption, parental leave benefits
• Ovia Health, fertility, and family planning
• Adoption Assistance
• Autism Benefit
• Employee Assistance Plan, including up to 10 free counseling sessions
• Healthy You Incentives, wellness rewards program
• Doctor on Demand, virtual doctor visits
• Bright Horizons, child and elder care services
• Teladoc Medical Experts, second opinion program
• Eligible for relocation assistance
• And more!

Employee Referral Eligible

#MISENG

_ As part of our commitment to maintaining a secure hiring process, candidates may be asked to attendselect steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote. _

The salary range for this role is 145,600 USD - 276,800 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills.

Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement.

Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance.

This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply.

RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window.

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, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act.

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