 Jonathan began as an amateur fighter after 5 months of training and got 10 wins before he started his professional career which did start well.He fought at 205, 185 and 170 where he got 8 wins before reaching the UFC

Taking a 13-5 MMA record to the UFC, Goulet was successful in his debut, earning a TKO victory over Jay Hieron.His second UFC fight, however, did not go his way.