Sisu Systems, LLC : Kristen Hamilton, DCN, RDN, CSSD

Sisu Systems, founded in 2004, is a performance training and sports nutrition company led by Kristen Hamilton, DCN, RDN, CSSD. They provide personalized coaching, sports and wellness nutrition services, and staffing solutions for individuals, teams, schools, and organizations—delivered both virtually and on-site. Their approach emphasizes individualized programming rather than generic plans, with a team of qualified strength and conditioning coaches dedicated to client success.