About John Kilmartin

John Kilmartin helps buyers and sellers on Long Island’s North Shore cut through the complexity of real estate and come out on the other side with results they’re proud of. He’s direct, organized, and relentless about follow-through — the kind of agent who answers his phone and actually knows what he’s talking about.

Before getting his license, John spent six years managing programs for a military defense contractor and two more running projects for a construction firm, overseeing multi-million-dollar ground-up home builds. That background isn’t just a talking point — it shapes how he evaluates properties and spots what truly adds value, and he brings that same scrutiny to every listing and every offer he writes for his clients.

Since launching his career, John has built a track record across a wide range of properties, earning referrals from clients who describe him as sharp, dependable, and easy to work with under pressure.

John grew up in Ridge and now lives in St. James — he knows these towns, these streets, and this market from the inside. When he’s not working a deal, he’s usually on a motorcycle, a mountain, or a golf course. He’s also a husband and a new dad, which has only sharpened his appreciation for what buying or selling a home actually means to people.

If you’re thinking about buying, selling, or renting on the North Shore, reach out. No pressure, just a straight conversation