Dosier Jiu Jitsu

Dosier Jiu Jitsu brings Brazilian Jiu-Jitsu home to Pittsfield under the guidance of black belt Donnald Osier, a lifelong local who returned to his roots after thirteen years of training and commuting to learn from top coaches in the region. Osier’s journey—shaped by overcoming adversity, high school wrestling, and the discipline of Jiu-Jitsu—drives the academy’s mission: to offer Pittsfield a place where integrity, discipline, and transparency are at the heart of every class. His focus is not just on technical skill, but on helping students build confidence and resilience, both on the mats and in daily life. The academy offers a blend of traditional gi and no-gi Brazilian Jiu-Jitsu for adults, with Osier leading the gi program and Chad Rheaume instructing no-gi sessions. Classes are structured for all experience levels, and drop-ins are welcome, reflecting the school’s open-door approach. Young students can join the Little Ninjas program, which introduces kids to the basics of BJJ in a safe, encouraging setting—a nod to Osier’s belief in giving Pittsfield’s youth the opportunities and positive outlets he once sought himself. Training at Dosier Jiu Jitsu emphasizes effort, safety, and having fun, with programs designed to build fitness, practical self-defense skills, and mental toughness. The facility is wheelchair accessible, and the schedule is built to support both new and experienced grapplers looking to train alongside a coach who is committed to growing and learning with his students.

Amenities