{"id":1126702,"url":"https://alion.io/job/rtx-principal-software-engineer-advanced-simulation-training-systems-onsite","title":"Principal Software Engineer - Advanced Simulation & Training Systems (Onsite)","company":{"id":1162,"name":"RTX","domain":"rtx.com","url":"https://alion.io/company/raytheon-technologies","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":95,"open_postings":208,"ghost_share":0,"stale_share":0.38,"repost_share":0.058,"time_to_fill_p50_days":9,"computed_at":"2026-10-21T05:46:15Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Sterling, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":118300,"max":224900,"currency":"USD","period":"year","gross":null,"usd_annual":224900},"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"ARINC","optional":false},{"name":"C++","optional":false},{"name":"CI/CD","optional":false},{"name":"Confluence","optional":false},{"name":"GitLab CI","optional":false},{"name":"Linux","optional":false},{"name":"MIL-STD-1553","optional":false},{"name":"Perl","optional":false},{"name":"Python","optional":false},{"name":"STL","optional":false},{"name":"Windows","optional":false}],"status":"live","first_seen_at":"2026-08-07T00:00:00Z","employer_posted_date":"2026-10-12","last_verified_at":"2026-10-22T02:30:38Z","board_verified":true,"closed_at":null,"days_open":76,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":76},"description":"Date Posted:\n2026-10-12\n\nCountry:\nUnited States of America\n\nLocation:\nUS-VA-STERLING-291 ~ 22640 Davis Dr ~ DAVIS\n\nPosition Role Type:\nOnsite\n\nU.S. Citizen, U.S. Person, or Immigration Status Requirements:\nActive 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\n\nSecurity Clearance Type:\nSecret - Current\n\nSecurity Clearance Status:\nActive and existing security clearance required on day 1Principal Software Engineer - Advanced Simulation & Training Systems (Onsite)\nAt RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.\nCollins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.\nRole Description:\nWe are searching for a Principal Software Engineer to join our team in Sterling VA within the Strategic Defense Solutions (SDS) business area.\nOur teams develop and build highly realistic simulators and training systems for both military and commercial customers. We deliver highly specialized training for some of the most demanding jobs in aviation. Devices range in complexity from desktop training all the way to high fidelity weapon system and full-flight training systems including full visual motion and simulator interoperability.\nIn this position, you will become a technical subject matter expert for the design, implementation, and testing of complex multi-platform training device software and their associated user interfaces. This position requires a highly skilled individual who can step onto a team and quickly come up to speed on complex systems, who is also comfortable dealing with customers and program leadership. We are seeking a candidate who thrives in a team-oriented environment, demonstrates leadership qualities, and is passionate about mentoring peers and advancing technical excellence. Candidates with agile development experience and the desire to grow into agile leadership roles are strongly encouraged to apply! This position requires an active US security clearance. Most aspects of the job are done in a classified lab environment and requires a daily onsite presence.\nWhat You Will Do:\nDesign, develop, integrate, and test software on cross-functional agile teams to deliver solutions within budget, scope, and schedule constraints \nExhibit ownership of and accountability for committed objectives\nAssist in analysis and decomposition of features\nMake and influence decisions which impact cost, schedule, and technical performance at a program level \nHighly motivated software development focal who is able to drive strong technical solutions and decision making\nPerform multi-threaded software debugging \nWork independently with limited supervision \nMentor early-career engineering peers to advance their ability to contribute to team objectives\nDemonstrate leadership qualities in your everyday work - Be a positive focal for your team, recognize peers’ accomplishments, and help onboard junior team members. \nPerform and lead bidding and proposal activities to support the acquisition of new business \nContribute to software and systems engineering requirements capture and analysis \nTravel to domestic and international customer sites to support training events and product installations \n Qualifications You Must Have:\nTypically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience\nActive and transferable U.S. government issued security clearance is required prior to start date\nU.S. citizenship only (dual citizenship not permitted) is required, as access to information under this program/contract is restricted to individuals with sole U.S. citizenship. \nMust have previous experience working with C++. \nHave experience with agile development practices and general software engineering design principles \n Qualifications We Prefer:\nPrior experience with training simulations\nFamiliarity with common training and avionics protocols (ARINC 429, ARINC 610, MIL-STD-1553, etc.)\nExcellent written and oral communication skills \nFamiliarity with Windows and Linux development environments \nCandidate exhibits leader-like qualities and has a willingness to share their knowledge and build up their peers \nExperience using Visual Studio\nFamiliarity with DevSecOps and Agile development methodologies \nStrong OOP and C++ language skills including STL, Templates \nFamiliarity with scripting languages (Python, Perl, etc.) \nUsage of source code control tools (GIT, SVN, ClearCase, etc.) \nUsage of ALM tools (JIRA, Confluence, Crucible)\nUsage of GitLab CI/CD tools within software development processes\nDo you want to be a part of something bigger? A team whose impact stretches across the world, and even beyond? At Collins Aerospace, our Mission Systems team helps civilian, military and government customers complete their most complex missions - whatever and wherever they may be. Our customers depend on us for intelligent and secure communications, missionized systems for specialized aircraft and spacecraft and collaborative space solutions. By joining our team, you’ll have your own critical part to play in ensuring our customer succeeds today while anticipating their needs for tomorrow. Are you up for the challenge? Join our mission today.\nWhat We Offer:\nSome of our competitive benefits package includes:\nMedical, dental, and vision insurance \nThree weeks of vacation for newly hired employees \nGenerous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option \nTuition reimbursement program \nStudent Loan Repayment Program \nLife insurance and disability coverage \nOptional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection \nBirth, adoption, parental leave benefits \nOvia Health, fertility, and family planning \nAdoption Assistance \nAutism Benefit \nEmployee Assistance Plan, including up to 10 free counseling sessions \nHealthy You Incentives, wellness rewards program \nDoctor on Demand, virtual doctor visits \nBright Horizons, child and elder care services \nTeladoc Medical Experts, second opinion program \nEligible for relocation assistance\nAnd more! \nLearn More & Apply Now!\n*Please ensure the role type (defined below) is appropriate for your needs before applying to this role.\nOnsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products.\nAt Collins, the paths we pave together lead to limitless possibility. And the bonds we form - with our customers and with each other -- propel us all higher, again and again.\nApply now and be part of the team that’s redefining aerospace, every day.\n#MISENG\nAs part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select 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.\nThe salary range for this role is 118,300 USD - 224,900 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.\nPrivacy Policy and Terms:\nClick on this link to read the Policy and Terms","description_format":"text","description_chars":10103,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":true,"languages":[]},"benefits":["Flexible schedule","Life insurance","Parental leave","Relocation assistance","Vision insurance"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":true,"industries":["Missiles","Air Defense","Defense Manufacturing","Avionics & Flight Control"],"lifecycle":[{"event":"open","at":"2026-09-22T21:55:43Z"}],"visa":[],"liveness":{"score":7,"band":"cold","label":"Long shot","p_open":1,"p_active":0.264,"p_room":0.28,"age_days":75,"expected_fill_days":9,"reasons":["conf:1","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-21T05:46:15Z"},"pay":{"stated_usd_annual":224900,"is_top_pay":true},"html_url":"https://alion.io/job/rtx-principal-software-engineer-advanced-simulation-training-systems-onsite","json_url":"https://alion.io/job/rtx-principal-software-engineer-advanced-simulation-training-systems-onsite.json","meta":{"generated_at":"2026-10-22T03:46:04Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":3739,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-23T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":1162},"rest":"https://alion.io/mcp/rest/get_company?id=1162"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Frtx-principal-software-engineer-advanced-simulation-training-systems-onsite"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Frtx-principal-software-engineer-advanced-simulation-training-systems-onsite"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Frtx-principal-software-engineer-advanced-simulation-training-systems-onsite"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/rtx-principal-software-engineer-advanced-simulation-training-systems-onsite\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Frtx-principal-software-engineer-advanced-simulation-training-systems-onsite"}]}