Principal RF Engineer

Overview

Physical Sciences Inc. is seeking an experienced and motivated Principal RF Engineer to support the research, development, and deployment of cutting‑edge technologies, including directed energy systems, novel microwave phase shifters, deployable phased‑array space antennas, and hypersonic antennas. A solid understanding of theoretical concepts and first principles is a must, as is the ability to work independently. The ideal candidate will be multidisciplinary, with strong systems‑engineering capabilities, and will help design and build advanced RF systems such as broadband and narrow band antenna systems, high‑temperature phased‑array antennas, phase shifters and lightweight transmission lines, novel RF sources, and fully integrated counter‑electronic directed energy systems.

Applications include counter‑unmanned aerial systems (C‑UAS) and vehicle/vessel engine‑stopping technologies, as well as high‑temperature antennas for missiles and hypersonic vehicles. The role offers a hands‑on opportunity to work on real‑world, field‑deployable systems across all development phases, from early R&D through product development.

• Design, prototype, and maintain RF test platforms.
• Simulate and develop novel antenna and transmission line architectures.
• Collaborate with mechanical engineers on design for manufacturing antennas and RF components.
• Support integration of RF sources and pulsed‑power systems into HPM prototypes.
• Conduct and interpret anechoic chamber and free‑space measurements.
• Assist system engineers and business development teams in generating new technical proposals and system concepts.
• Lead and mentor junior engineers while managing multi‑disciplinary technical efforts.

• Bachelor’s degree in Electrical Engineering, Physics, or related field (MS or PhD strongly preferred).
• At least 6 years of hands‑on experience in RF system design, test, and integration.
• Highly proficient in using RF test equipment: VNAs, spectrum analyzers, oscilloscopes, signal generators, and power meters.
• Deep understanding of RF theory and first principles, including components such as circulators, amplifiers, mixers, phase shifters, and phased‑array antennas.
• Strong communication and documentation skills.
• Demonstrated ability to work independently and across engineering disciplines.
• U.S. citizenship required.

• Experience with antenna and transmission line fabrication techniques as well as antenna characterization.
• Familiarity with RF data acquisition and post‑processing tools.
• Experience measuring the complex permittivity of solid and liquid dielectric materials.
• Magnetic circuit design and knowledge of ferrimagnetic materials.
• Mechanical prototyping and lab system assembly experience (cooling systems, enclosures, electronics).
• Proficiency in RF simulation tools such as CST Microwave Studio, HFSS, or COMSOL.
• PCB design and layout experience (e.g., Altium).

Pay Range: The estimated annual base salary range for this role is $105 – $140K
. The actual salary offered will depend on the candidate’s experience, education, and specialized skills.

PSI is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.