Job Description. Job Description. Job Summary. As a brand ambassador, a Personal Trainer represents Crunch Franchise to members and clients by delivering a positive fitness experience and quality personal training sessions leading to member retention and client acquisition and retention. Responsible for. Upholding the Crunch Franchise core values of T.R.A.I.N.: Timely, Ready, Attentive, Inspiring, Noble. Make reaching fitness goals achievable by ...