Lavoisier is known for his role as Rex Balsom on the ABC soap opera, One Life to Live, Portraying that character from 2002 to 2012. During that same year, he also appeared in the horror movie Wolves of Wall Street. He is a member of the advisory board of theatre production company Streetlight Productions, Inc, and has performed in various off-Broadway plays including Discordant Duets and Counterfeit Garden.