Systems Engineer (Modeler)

Leidos•Colorado Springs, CO

11d•$107,900 - $195,050•Onsite

About The Position

Leidos Defense Sector is seeking a Systems Engineering Modeler to support the Ground-Based Radar (GBR) Digitization Program, a major modernization initiative enhancing the nation’s missile warning, missile defense, and space domain awareness capabilities. In this role, you will support the modernization of legacy radar systems across eight Ground-Based Radar sites. These systems provide continuous surveillance, detection, tracking, and reporting of missile and satellite activity in support of Missile Warning (MW), Missile Defense (MD), and Space Domain Awareness (SDA) missions. The GBR Digitization Program is implementing a common digital backend architecture and modernizing radar front-end systems to maximize standardization, improve maintainability, and enhance mission readiness across the enterprise.

Requirements

Bachelor’s degree in Systems Engineering, Information Systems, Computer Science, or related field and 8+ years of relevant experience (additional experience, training, or certifications may substitute for degree).
US Citizen; Currently possesses an Active Secret Clearance.
Demonstrated experience with Model-Based Systems Engineering (MBSE), Digital Engineering, Cameo, scenario thread development, system integration, configuration management, cybersecurity, test support, and CI/CD.
Strong written and verbal communication skills with the ability to engage both technical and non‑technical stakeholders.

Nice To Haves

Master’s degree in a related field with 6+ years of relevant experience.
Professional certifications such as DoD IAT Level II (e.g., Security+).
Experience supporting DoD, MDA, U.S. Space Force, Air Force, or Intelligence Community programs.
Experience with Integrated Tactical Warning / Attack Assessment (ITW/AA) systems or radar systems.
Experience with missile and space on‑orbit events, cybersecurity, classified networks, cloud solutions, operational acceptance governance, and system lifecycle management.

Responsibilities

Design, create, and maintain complex digital system models using SysML or UML to represent system architectures, requirements, behaviors, and interfaces.
Develop detailed architecture, behavior, and process models for radar back-end systems, algorithms, hardware, and software.
Work in CAMEO Enterprise Architect for model data, management, branching, versioning, audits, and digital processes.
Author and maintain model-based Interface Control Documents (ICDs) and mapping frameworks to ensure interoperability across system components.
Build executable models and automated validation suites to test system constraints and performance prior to physical prototyping.
Support development of mission and operational scenario threads to inform system design and performance requirements.
Apply MBSE and Digital Engineering best practices to define the to‑be system design, including mission, cyber, interoperability, and environmental requirements.
Contribute to system baseline development across the program’s three-phase contract: requirements definition, baseline establishment, and deployment of the modernized solution.