Our company was founded by Sean Clarke, owner of Diablo Glass School. Our gym, a.k.a. “box” is housed within the same building as the glass blowing school at 123 Terrance St in Boston, MA. Teaming up with Javy Caraballo, Sean opened the gym for the community of Roxbury and Mission Hill where he has lived and worked for more than 26 years. Javy Caraballo manages all operations and the coaching staff for CrossFit on the Hill and CrossFit Jeffries Point.CrossFit on the Hill and CrossFit Jeffries Point are registered affiliates through CrossFit Inc. and can be found on the affiliate locator on the CrossFit HQ website. Our affiliation allows us to provide a CrossFit training experience to the community through scientific training methods and nutritional guidance that elicit results.