Senior TOC Modeling Engineer — DES & Throughput Expert

RTX (Raytheon); Tucson (AZ); On-site; USD 120,000 - 170,000; Full time

Job summary

RTX is seeking a Senior Theory of Constraint (TOC) Modeling Engineer for an onsite role in Tucson, AZ. You will lead discrete event simulation efforts across Systems Engineering, Operations, and Manufacturing to deliver affordability and readiness improvements.

You will develop and validate DES models, customize logic, analyze queueing dynamics, resources, throughput, and yield sensitivities, and mentor junior modelers while integrating program data updates and presenting results to leadership.

Qualifications

• Typically requires a STEM degree and 5+ years of relevant experience.
• Experience in Systems Engineering, operations research or industrial engineering.
• DES modeling experience with multi-product flows.
• Experience with structured datasets (Excel/CSV/databases).
• Ability to interpret queueing dynamics and bottlenecks.

Responsibilities

• 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 TOC methodology, DES fundamentals, and Affordability Engineering standards.

Skills

DES modeling

Systems Engineering

Operations research

Industrial Engineering

Queueing dynamics

Data analysis

Education

STEM degree

Tools

Python

Power BI

Tableau

JMP

C programming

Job description

RTX is seeking a Senior Theory of Constraint (TOC) Modeling Engineer for an onsite role in Tucson, AZ. You will lead discrete event simulation efforts across Systems Engineering, Operations, and Manufacturing to deliver affordability and readiness improvements.

You will develop and validate DES models, customize logic, analyze queueing dynamics, resources, throughput, and yield sensitivities, and mentor junior modelers while integrating program data updates and presenting results to leadership.