Sr. Principal Systems Engineer – Flight Execution Lead

Date Posted:

2026-07-16

Country:

United States of America

Location:

US-AZ-TUCSON-805 ~ 1151 E Hermans Rd ~ BLDG 805

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 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.

Raytheon brings 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. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

Our mission is to develop best in industry technologies that align product capabilities to the needs of our customer. We empower our employees to leverage design commonality and innovation, balancing risk and rigor, to achieve predictable and affordable solutions.

The Processing, Guidance, and Control center is currently hiring for a Sr. Principal Systems Engineer – Flight Execution Lead position in Tucson, AZ to support the execution of the portfolio of current and upcoming missile programs. The Flight Execution Lead will provide technical leadership for a strategically important software upgrade that enhances the company’s long‑term competitiveness and strengthens future program pursuits. This role oversees a cross‑functional team of 25–30 engineers spanning Guidance, Navigation and Control (GNC), Flight Sciences, Operational Analysis (OA), Simulation, Performance, and Mission Planning software - disciplines that collectively define system flight behavior and mission execution.

Sr. Principal Systems Engineer – Flight Execution Lead is responsible for unifying technical decisions across these areas, managing system‑level risk, and ensuring all elements of flight behavior remain synchronized with program objectives and customer requirements. This position guides the development of advanced flight algorithms, integrated simulation environments, and mission‑level logic essential to delivering the next generation capability. This role also includes Cost Account Management responsibilities, ensuring financial execution aligns with program scope, schedule, and technical commitments.

What You Will Do

Provide unified leadership across all flight execution disciplines

Ensure system‑level coordination across GNC, OA, Simulation, Performance, and Mission Planning

Drive development of advanced flight algorithms and mission‑level system behaviors

Maintain integrated simulation environments aligned with customer expectations

Manage cross‑disciplinary dependencies affecting flight dynamics and mission effectiveness

Keep engineering efforts aligned to aggressive, customer‑driven schedules

Perform Cost Account Management duties, including planning, tracking, and reporting cost and schedule performance for assigned control accounts

Qualifications You Must Have

Typically requires a Bachelor’s degree in Engineering, Science, Physics, Mathematics, or a related STEM degree and a minimum of 10 years prior relevant experience

Experience with fluid mechanics, computational fluid dynamics, or applied aerodynamics

Experience with High‑Performance Computing workflows, distributed architectures, or cloud‑based compute environments

Experience with Linux/Unix operating systems

Ability to obtain an Interim Secret U.S. government‑issued Security Clearance prior to start, with ability to obtain special program access after start. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications We Prefer

An advanced degree (Master’s or PhD) in a STEM discipline

Computational fluid dynamics and aerodynamic design experience across varied aerodynamic regimes (subsonic through hypersonic and non‑continuum)

Experience with CFD++

Strong communication skills for coordinating technical decisions across diverse engineering specialties

Experience with Cadence Pointwise

Experience with Tecplot, FieldView, or ParaView

Experience with basic shell scripting or programming with Python

Experience leading cross‑disciplinary engineering teams (GNC, OA, Simulation, Performance, Mission Planning)

Experience with development, integration, or verification of flight algorithms or mission‑level logic

Familiarity with system‑level modeling, digital twin environments, or high‑fidelity simulation architecture

Experience with system engineering practices including requirements development, interface control, and verification/validation

Experience managing technical risk across large, multi‑disciplinary teams

Background in Agile or iterative software development processes

Understanding of mission analysis, weapons effectiveness, or operational scenario modeling

Experience with Cost Account Management (EVMS, planning, tracking, and reporting control account performance)

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 - relocation assistance is available for this position

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 onsite work in Tucson, AZ: https://careers.rtx.com/global/en/raytheon-tucson,-az-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 132,400 USD - 251,600 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.