Leidos' Defense Uncrewed Systems Integration and Test is seeking a motivated and ambitious RF Communications & Signal Processing Engineer to join the Software, Simulation, Systems Engineering and Integration Directorate (S3I) Joint Technology Center - Systems Integration Lab (JSIL) Technology and Certification Center. In this role, you'll support the development, integration, testing, and evaluation of advanced tactical data links and communications systems for Unmanned Aircraft Systems (UAS) and other airborne and ground platforms supporting U.S. Army and DoD missions. This is a hands-on, multidisciplinary engineering role at the intersection of RF communications, digital signal processing, and electronic warfare. You'll work across the test and evaluation lifecycle, from laboratory analysis and system integration to field, and flight testing, with opportunities to expand your expertise across these technical areas. The ideal candidate brings strong technical depth in one or more of these areas and an interest in expanding their expertise across the others. You'll lead advanced test and analysis efforts, evaluate communications system and waveform performance, assess communications resilience and signal detectability, and collaborate with multidisciplinary teams and government stakeholders to deliver mission-ready capabilities and help inform future U.S. Army and DoD communications systems. Primary Responsibilities 3 Provide technical leadership and subject matter expertise in RF communications, digital signal processing, and tactical data link technologies. 3 Develop test strategies, plans, and procedures, and prepare technical reports for laboratory, field, and flight test activities. 3 Plan, execute, and support RF communications system testing, including system integration, instrumentation, data collection, and post-test analysis. 3 Analyze waveform performance, RF link quality, communications resilience, signal detectability, and overall system effectiveness under operationally representative conditions. 3 Perform advanced signal analysis to characterize communications system performance and identify opportunities for improvement. 3 Interface with government stakeholders, test organizations, and industry partners to support technology development, acquisition decisions, and system integration. 3 Present technical findings and recommendations to internal leadership and government stakeholders. 3 Provide technical mentorship and guidance to junior engineers and test personnel. Basic Qualifications 3 Bachelor's degree in Electrical Engineering, Physics, or a related engineering field with a minimum of 8 years of experience. 3 Master's degree in Electrical Engineering, Physics, or a related engineering field with a minimum of 6 years of experience. 3 Experience leading technical analysis or test activities for RF communications systems. 3 Strong understanding of RF theory, including propagation, RF system performance, and link budget analysis. 3 Strong understanding of digital communications concepts, including modulation, coding, filtering, waveform design, and signal processing. 3 Experience troubleshooting RF or communications systems in laboratory, field, or flight test environments. 3 Strong written and verbal communication skills with the ability to develop technical reports, and briefings, and effectively present engineering recommendations. 3 Active Secret security clearance with the ability to maintain it (Top Secret eligibility preferred). 3 Must be a resident of Huntsville, AL or willing to relocate to the Huntsville, AL area. Preferred Qualifications 3 Master's or Ph.D. with an emphasis in electromagnetics, RF engineering, digital communications, or signal processing. 3 Experience with Common Data Link (CDL), tactical data links, software-defined radios (SDRs), SATCOM, or resilient communications. 3 Experience electronic warfare (EW), spectrum operations, or anti-jam (AJ) and low probability of detection (LPD) assessments. Original Posting: August 26, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay Range: Pay Range $107,900.00 - $195,050.00 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.