Hello!

Sean and Sinjon here

We started Three Rivers Precision because manufacturing is our passion. With over 10 years in the industry, we know what good manufacturing looks like and how to communicate with customers. Our aim is to deliver a total manufacturing experience that prioritizes service, efficiency, and quality.

Sinjon Bartel

Sinjon holds a degree in Mechanical Engineering with a focus on mechatronics and electromechanical systems. His professional background in engineering and fabrication make him a skilled project manager and machinist. Outside of the shop, Sinjon plays competitive bike polo, rock climbs, and spends time gardening with his partner.

Sean Handerhan

With a degree in Mechanical Engineering and over a decade of experience as a mechanic, Sean is a relentless problem solver devoted to quality production. He is a former competitive cyclist and custom bike frame welder. When he’s not running machines, he loves rock climbing and spending time with his partner and pup in their Wilkinsburg home.