Principal Radio Frequency Engineer

Position Title: Principal Radio Frequency Engineer Location: Onsite at Aberdeen Proving Grounds Clearance Requirement: Top Secret / With SCI eligibility Employment type: Full Time Research Innovations, Inc. (RII) is breaking through the big, slow status quo with transformative technology that fundamentally improves the world.

We build advanced software solutions for government and military missions, applying agile development and user-centered design to solve complex, mission-critical problems. We are seeking a highly driven Principal RF Engineer to join our EW/SIGINT team supporting Defense and Intelligence Community missions. In this role, you will solve complex, mission-critical challenges and develop advanced RF collection capabilities that enable real-time situational awareness in dynamic operational environments.

You will support and sustain deployed operational systems, ensuring performance, reliability, and mission effectiveness in real-world conditions, while contributing to systems that discover, analyze, and exploit signals across full-spectrum operations—delivering precise, actionable intelligence when it matters most.