Senior Theory of Constraint (TOC) Modeling Engineer

Location: US-AZ-TUCSON-800 ~ 1151 E Hermans Rd ~ BLDG 800

 Position Role Type: Onsite

 U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required.​ U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance

 Security Clearance Type: DoD Clearance: Top Secret

 Security Clearance Status: Active and existing security clearance required after day 1     At RTX, the world 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.   Affordability Engineering at Raytheon integrates technical performance, manufacturing behavior, supply chain dynamics, sustainment workflows, and readiness metrics into a unified cost and throughput framework that supports leadership decision-making across the full product lifecycle. As the Senior Theory of Constraint (TOC) Modeling Engineer , you will play a critical role in enabling enterprise-level insights through advanced Discrete Event Simulation (DES) modeling.   The Senior Theory of Constraint (TOC) Modeling Engineer coordinates local efforts and ensures alignment with enterprise standards. You will collaborate across Systems Engineering, Operations, Supply Chain, and Manufacturing teams to deliver impactful modeling results that drive affordability, readiness, and throughput improvements.   This is an onsite role based in Tucson, AZ.

Lead onsite TOC modeling activities in Tucson, coordinating daily modeling tasks, priorities, and data updates across local stakeholders. Develop, modify, and validate discrete event simulation models, including customization of logic, resource networks, multi-contract/multi-product flows, and sustainment behaviors. Collaborate with cross-functional teams to define model boundaries, extract inputs, validate assumptions, and ensure alignment with real-world system behaviors. Analyze and communicate system constraints, throughput impacts, queueing behaviors, yield sensitivities, resource limitations, and supply-demand interactions. Design and execute advanced experiments, scenario sweeps, and sensitivity analyses to support affordability and readiness metrics. Create and maintain high-quality model documentation, assumption logs, configuration baselines, and traceable data reduction workflows. Present simulation outputs to program leadership, explaining operational, affordability, and readiness impacts with clarity and technical accuracy. Support continuous integration of updated program data, ensuring models reflect evolving factory, supplier, and sustainment realities. Mentor modelers through technical guidance, fostering growth in TOC methodology, DES fundamentals, and Affordability Engineering standards.

You Must Have Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior relevant experience unless prohibited by local laws/regulations. Experience in Systems Engineering, operations research, Industrial Engineering, and/or complex production system modeling. Experience with discrete event simulation