Liam has been working professionally as a comedian since age 19. His concert film, which he produced and starred in, called Tell Your Friends!, was invited to hold its world premiere at the SXSW Film Festival and made a full run of film festivals, comedy festivals, and panel/screenings at The Paley Center and NY Comic Con.

He has written professionally for TV shows, networks, publications, and clients including Comedy Central, Maxim, and Microsoft. His screenplays have placed as quarterfinalist in the Academy Nicholl, two times as semifinalists at the Atlanta Film Festival, two times as a quarterfinalist for the Final Draft Big Break, three times as a quarterfinalist for Screencraft Comedy, and once as a second rounder for Launchpad.

In 2014, his album, Comedian, was released on ASpecialThing Records and debuted at the top of the Amazon and iTunes comedy charts, where it still appears. His second album, Working Class Fancy, was released by Comedy Dynamics in 2016, and also continues to appear on the Amazon and iTunes bestseller charts.

His podcast and radio appearances include multiple episodes of WTF with Marc Maron, and The Howard Stern Wrap Up Show, and in 2016,
GQ Spain included Liam in their list of the “100 Best Comedians of All Time.”