RF Systems Engineer, Antenna Fabrication and Test

THE MISSION ITERRA is building the system of record for low-altitude airspace. Above 400 feet, every aircraft is tracked, logged, and attributable. Transponders, flight plans, radar, ATC. Below it, nothing. No transponder mandate an adversary obeys, no log, no attribution. Every headline ends the same way: nobody could say what was in that airspace. A record-keeper cannot be a participant in the fight it is recording. That is why we are passive, and it is not a limitation, it is the product. WHAT WE ARE BUILDING Passive, edge-native RF and electro-optical sensing that autonomously detects and classifies Group 1-3 UAS without relying on pre-loaded signature libraries. Fused on the device. No active emissions. No cloud dependency. Purpose-built for denied, degraded, intermittent, and limited (DDIL) environments where legacy radar and library-dependent sensors fail. WHO WE ARE Small team. High trust. No bureaucracy. No tourists. Only builders. Field-tested, integrated with the command-and-control systems our customers already run, SDVOSB certified, and manufacturing on U.S. soil in Hatillo, Puerto Rico. WHAT YOU OWN Everything the detection stack can hear is bounded by what the antenna captures and what the front end preserves. You own that boundary, from the air interface to the samples the SDR hands off. You also own the measurement function that proves it works. You will report to the CTO. Antenna fabrication and measurement. Our antennas are designed in house. You build what the design calls for and you prove what it actually does. Sheet metal, 3D-printed structures, RF PCB, connectors, and phase-matched cabling. VNA measurement of S11, return loss, and bandwidth. Gain and pattern measurement, in a chamber or by open-field comparison. Tolerances matter here: on a direction-finding array, a feed path a centimeter long is a bearing error in the field. You report the pattern you measured, not the pattern that was simulated. RF front end. Filtering, LNA and gain distribution, sensitivity and noise figure, IP3 and dynamic range, intermodulation and blocker rejection, cabling and connector loss budgets. You own the tradeoff between hearing the weak signal and surviving the strong one. Waveform analysis. Characterize UAS control link and video downlink signals from raw IQ. Modulation, bandwidth, symbol rate, hopping behavior, framing. You tell the detection engineer what is actually in the air. Test bench and procedure. Instrumentation, calibration, controlled signal injection, repeatable written procedure. If a result cannot be reproduced next month, it is not a result. Over-the-air collection. Live Group 1-3 targets across wooded, open, and urban terrain. Fixed and moving. Multiple airframes, including modified ones. Ground truth and dataset hygiene. Labeling protocol, versioning, metadata discipline. The training corpus is a company asset and its quality is your responsibility. Government criteria characterization and documentation. Detect, track, and identify performance measured against published counter-small-UAS characterization criteria, documented cleanly enough to submit in a federal proposal without rewriting. Radome and enclosure effects and computer vision integration. Detuning, loss, and pattern distortion from the housing. You work with mechanical engineering so the antenna that passed on the bench still passes inside the box, outdoors, in Caribbean heat and humidity. The number you produce is the number that goes into a product and into thd test report. Nobody downstream re-derives it. That is the weight of the seat, and it is why we will hand it to someone early in their career who has clearly earned it. WHAT WE REQUIRE B.S. in Electrical Engineering or Physics. Recent graduates through roughly 5 years of experience. Hands-on work counts wherever you did it: coursework, senior design, student competition, amateur radio, or a bench in your apartment. We care that you have done it, not who paid you to. You have built…