John Andrzejewski

Yo, you gotta hear about John Andrzejewski. This guy’s the real deal in the defense tech space. So, he’s a Georgetown physics nerd turned startup founder, and he’s all about that high-stakes game of drone defense. His process’s pretty sick – started with a solid background in RF engineering, electronic warfare, and signal analysis. Basically, he’s the guy who’s been deep in the trenches of defense R&D, working on countermeasures and electronic warfare stuff before jumping into the startup world.

Fast forward, he co-founded Guardian RF in 2024, right in the thick of the drone craze. The company’s backed by Y Combinator’s S24 batch – that’s the big leagues, no cap. Guardian RF’s mission? Build tech that can detect, classify, and neutralize drone threats – all without relying on visual or radar systems. They’ve innovated a software-defined RF solution that’s autonomous – basically, it’s smart enough to handle threats on its own, which is a big change for defense and security.

And get this – their tech isn’t just all talk. They’ve tested it in real combat zones, including Ukraine. That’s advanced validation. They’ve got products like the Scout handheld counter-UAS device and the Mosaic Network for wide-area detection, and they’re already landing defense contracts, pilot programs at airports, and catching the interest of critical infrastructure operators. Basically, they’re making the sky safer while building a company that’s expandable and super relevant.

What does this all say about John? It’s clear he’s driven by real-world impact. His background in physics and defense isn’t just academic – he’s been in the trenches, solving real problems with tech that matters. Starting Guardian RF wasn’t just about building a company; it was about creating something that can actually save lives and keep critical assets safe from rogue drones. His process shows he’s all about pushing boundaries, innovating in high-stakes environments, and turning hardcore expertise into badass, real-world solutions.

So, in a nutshell, John Andrzejewski is a tech pioneer who took his deep RF and warfare knowledge and turned it into a startup that’s changing how we defend against drones. He’s the kind of guy who sees a problem, jumps in, and crushes it with real tech that’s battle-tested. No fluff, just pure grit and smarts. That’s why he’s a total big change in this space.