Producer, songwriter, drummer, keyboardist, music director.

He achieved early success as the drummer of MCA artist Critical Mass. He is also considered one of the pioneers of drum programing by Artists and Producers.

In 1989, McWilliams was signed as a songwriter and producer by Emelio Estefan for Foreign Imported Production & Publishing (FIPP). During his 15 year's with FIPP, he wrote, programmed and produced for such artists as Jon Secada, Gloria Estefan, Ricky Martin, Chayanne, Paulina Rubio, Billie Myers, Los Rabanes, Bustamante, Don Omar, Lindsey Lohan and Sammy Hagar. McWilliams also toured extensively with Jon Secada as his Musical Director and Drummer. McWilliams also created the music for The Siren's of TI, at the Treasure Island Hotel and Casino in Las Vegas, NV.

In 2005 he formed Monstro Visionary Entertainment with partner Steve Altman. The same year Monstro signed British singer Lauren Harris who quickly rose to fame as one of the top myspace Artists, before signing to Demolition DR2 Records. McWilliams co-wrote and co-produced Lauren's debut album Calm Before The Storm.