In this role, you will help to sustain radar system software models and assist the team developing them in support of radio frequency (RF) and Electronic Warfare (EW) projects for the Defense Intelligence an Electronic Warfare Communities – specifically a diverse portfolio of projects and programs which specialize in foreign threat radar systems, RF software-in-the-loop (SIL) and hardware-in-the-loop (HWIL) simulators, and open-air radar development.    Primary Responsibilities.  • Sustainment and development of analytic to high-fidelity models of RF systems to support EW analysis.  • Ability to troubleshoot and rectify errant threat model behavior based on customer feedback.  • Development and integration into real-time and non-real-time simulation architectures.  • Assessing effects of operator-in-the-loop on radar and missile weapon system simulations.  • Threat model development to match intelligence assessments, including waveform scheduling, correlation/tracking, signal processing, and closed-loop missile behavior.  • Simulation and Graphical User Interface (GUI) development primarily focused on Windows.  • Testing, verification, and documentation of development and analysis efforts.    Basic Qualifications.  • Bachelor’s or Master's Degree in Electrical Engineering, Computer Science, Computer Engineering, Math, Physics from an ABET accredited institute and 0+ years of relevant work history is required. • A background in C++ software development is required.  • Candidate must demonstrate relevant skills in one or more of the primary focus areas, be self-motivated, have good interpersonal skills, and have the ability/desire to work in a technical team to solve challenging problems utilizing a broad spectrum of skills.  • Possess a demonstrated ability to manage and prioritize multiple tasks, adapt quickly to changing demands, and work both solo and on a team.  • Candidate must be a resident of the North Alabama area or willing to relocate to the Huntsville, AL area. • Candidate must be a US Citizen. • Candidate must possess (and be able to maintain) a Final Secret Clearance OR meet the eligibility to obtain (and maintain) a Secret Clearance   Preferred Qualifications.  • A strong background in C++/C# in a Windows operating environment is desired. Linux experience is desirable, but not required.  • Experience with weapons system analysis, modeling and simulation, graphics and displays, and real-time operating systems is desired. • Experience with Microsoft Visual Studio, MATLAB/Simulink, Atlassian products (JIRA, Bitbucket, etc.), GitHub products, Bash, Windows Presentation Foundation (WPF), PowerShell, Linux, and CMake are a plus. • Additional consideration will be given to candidates with a working knowledge or radar fundamentals, electronic warfare, and digital signal processing. Original Posting:September 8, 2026 Pay Range:Pay Range $57,850.00 - $104,575.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.