Sr Unix Engineer Jobs in Colorado (NOW HIRING)

Date Posted:

2026-07-23

Country:

United States of America

Location:

US-CO-AURORA-S79 ~ 16510 E Hughes Dr ~ BLDG S79

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:

DoD Clearance: Secret

Security Clearance Status:

Active and existing security clearance required on day 1

At Raytheon, the foundation of everything we do is rooted in our values and a higher calling – to help our nation and allies defend freedoms and deter aggression. We bring the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. Our team solves tough, meaningful problems that create a safer, more secure world.

We have an exciting opportunity for a Senior Systems Engineer – Modeling, Simulation & Analysis supporting one of our premier programs within Raytheon, an RTX Business. In this role, your experience with modeling and simulation, systems engineering analysis, software development, and performance assessment will be instrumental in the development of next-generation missile and sensor systems. You will work across integrated product teams consisting of Guidance, Navigation & Control (GNC), Signal Processing, and Performance Simulation engineers to develop and evaluate high-fidelity simulation environments that support mission success. The work is on-site in Aurora, CO.

What You Will Do

• Develop high-fidelity models and simulations to support missile design, performance assessment, and flight test activities
• Design, develop, and implement modeling and simulation solutions used to evaluate system and subsystem performance through trade studies and engineering analyses
• Collaborate with Guidance, Navigation & Control (GNC), Signal Processing, and Systems Engineering teams to execute simulation activities in support of program objectives and schedules
• Analyze simulation results and provide technical recommendations that influence system architecture and design decisions
• Support the product lifecycle from concept development through system integration, test, and fielded operations
• Present technical findings and provide subject matter expertise during design reviews, technical interchange meetings, and customer briefings
• Mentor junior engineers and provide technical guidance within a collaborative engineering environment

Qualifications You Must Have

• Typically requires a Bachelor's Degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 5 years of prior relevant experience
• Experience developing software using object-oriented programming principles with C and/or C++
• Experience using Python and/or MATLAB to analyze engineering data and develop modeling solutions
• Experience developing models or simulations of physical systems and applying modeling, simulation, or engineering analysis techniques to evaluate system performance
• Active and transferable DoD Secret U.S. government-issued security clearance is required prior to start date, with the ability to obtain Special Program Access. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications We Prefer

• Advanced Degree in Engineering, Science, Mathematics, or another STEM discipline
• Experience applying systems engineering principles within multi-disciplinary engineering teams
• Experience developing and presenting technical briefings to internal and external stakeholders
• Experience developing Guidance, Navigation & Control (GNC) algorithms, signal processing algorithms, or missile performance models
• Experience with hardware integration, control systems design, and hardware/software integration activities
• Experience modeling flight dynamics, physics-based systems, or missile performance characteristics
• Experience working in UNIX or Linux environments and using software configuration management tools such as Git
• Coursework or experience in radar, signal and image processing, EO/IR systems, digital communications, probability and statistics, linear algebra, estimation theory, optimal control, system architecture, inertial navigation, or guidance theory

What We Offer

• Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Safety, Trust, Respect, Accountability, Collaboration, and Innovation
• Relocation eligible

Learn More & Apply Now!

Please consider the following role type definition as you apply for this role:

• Onsite: 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.

• This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA CAS), an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the U.S. Department of State website here: https://www.state.gov/m/ds/clearances/c10978.htm

Location: Aurora, CO: https://careers.rtx.com/global/en/raytheon-aurora-co-location

As 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.

The salary range for this role is 86,800 USD - 165,200 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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