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.
His hobbies include tennis, skiing, golf and magic tricks. For ABC's Fan February events in 2007, he switched jobs with a fan who is a dance Teacher.
From September 25, 2011 to January 25, 2012, Lavoisier appeared on Dirty Soap with many soap opera alumni including his then girlfriend, Farah Fath.
In 2014, Lavoisier played Eric Preston in the soap opera web series Beacon Hill. In 2015, he began starring as Hugh Cambridge in the soap opera web series Winterthorne.
In July 2015, Soap Opera Digest reported that Lavoisier had joined the cast of Days of Our Lives as Philip Kiriakis, as part of the show's fiftieth anniversary.
