Simonin was a member of FC Lorient from ages 12–19, making it to the club's reserve squad before being cut.
Simonin spent the first two seasons of his college career at Lander University where he made a total of 32 and tallied two goals and three assists.
During his time in college, Simonin also played in the PDL for Carolina Dynamo and Seattle Sounders FC U-23.
[7] After his debut, with a rash of injuries to Toronto FC's defense, Simonin was signed to an MLS deal on 27 March.
[8] He went on to make his professional Major League Soccer debut on 29 March against Real Salt Lake.