The candidate will provide Radio Frequency (RF) Analysis, Simulation, and Development support for space-based RF communication systems with inter-operability integration across multiple US Government Customers. This position will require active security clearance to perform daily tasks. Support customer's Moon Base Utilities and Infrastructure Group, Deep Space Communications Network, and future RF infrastructures. The successful candidate will perform tasks such as: • Provide analyses of existing transmitters, receivers, and antenna designs. • Participate in requirements and data reviews providing inputs and comments. • Support test campaigns in the internal and external laboratories. • Support and generate RF subsystem trade studies. • Perform link margin analyses using various modulation protocols and environmental influences. • Write or collaborate communication system design and analyses reports. • Project milestone reviews for customers and stakeholders. • Project technical interchange, planning, review, and other appropriate meetings required to maintain current knowledge base of design, requirements, issues, action items, and resolution activities. • Perform radio frequency interference/radio frequency compatibility analyses. • Organizational management reviews. • Mentor early-career and internship engineers. Should be proficient in the following: Visual Basic, MathCAD and/or MatLab, ANSYS High Frequency Structure Simulator (HFSS), GPS/GNSS Simulators, and PNT / Communication Waveform Analyzers (BPSK, QAM, QPSK) Must be a US Citizen and currently have an active or can obtain US Security Clearance. Education requirements: A degree in electrical engineering from an ABET accredited university and 15 or more years of experience in Antenna and RF systems design, test, and evaluation. • Ph.D., with minimum of 4 years of experience, • MS with at least 8 years of experience, or • BS with at least 10-15 years of experience. Essential Functions Work Environment: Office environment. Requires ability to provide clear, concise, accurate and timely communication, both verbally and in writing (100%). Requires ability to interact professionally with co-workers, management, and client (100%). Requires travel in the domestic USA (5%). Requires ability to work at a computer for long periods of time (100%). Physical Requirements: Requires sitting for extended periods of time in meetings with peers, management, and with our client at NASA facilities to discuss technical issues (10%). Also, requires sitting for extended periods of time at a desk to write reports and perform engineering tasks (80%). Requires ability to use stairs or elevators for access between floors and multiple buildings at NASA and our facilities (10%). Equipment and Machines: Requires ability to operate a personal computer, a telephone, fax machine, copier, calculator, and other general office equipment (100%). Attendance: Normal workday 7:30-4:30, Monday thru Friday. Minimal overtime may be required (10%) to meet schedule milestones and to support technical demands of the job. Regular attendance is a necessity, and adequate arrangements for delegating duties during absences are required. Other Essential Functions: The ability to work independently with minimal supervision, and to make rational decisions, and to exercise good judgment is essential (100%). Grooming and dress must be appropriate for the position and must not impose a safety risk/hazard to the employee or others. Proof of U.S. Citizenship is required. #ESSCA #ASED #Amentum Compensation Details: ES4 The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws. Benefits Overview: Our health and welfare benefits are designed to support you and your priorities. Offerings include: • Health, dental, and vision insurance • Paid time off and holidays • Retirement benefits (including 401(k) matching) • Educational reimbursement • Parental leave • Employee stock purchase plan • Tax-saving options • Disability and life insurance • Pet insurance Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits. Original Posting: 09/09/2026 - Until Filled Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.