Beaulieu appeared as a semi-regular in Freaks and Geeks as the school’s biology teacher, Mr. Lacovara. He also appeared in The West Wing episode “Bad Moon Rising”. Beaulieu was a writer for America’s Funniest Home Videos from 1998 to 2007. In 2002, he was the head writer, producer, and host of the pilot episode of the Animal Planet show People Traps. He has since starred in the 2010 computer game Darkstar: The Interactive Movie as first officer Ross Perryman. In 2013, he reprised his role as Crow for a brief cameo appearance in two episodes of the fourth season of Arrested Development, along with Joel. In 2015, Beaulieu appeared as ART in the Yahoo! original comedy series, Other Space.

On October 30, 2007, Joel Hodgson announced he was starting a new series—distributed on DVD—with the same “riffing on bad movies” premise as MST3K. Called Cinematic Titanic, it featured several former MST3K cast and crew members: Beaulieu, J. Elvis Weinstein, Frank Conniff and Mary Jo Pehl.

Outside of acting, Beaulieu also wrote the script for the one-shot comic book Here Come the Big People, published by Event Comics. In 2010, Beaulieu completed work on a children’s poetry book, Silly Rhymes for Belligerent Children, a dark, twisted, humorous collection illustrated by Len Peralta.

Cinematic Titanic completed its final tour on December 30, 2013.

Since 2015, Beaulieu has joined his former MST3K co-star Frank Conniff (“TV’s Frank”) and gone on tour as “The Mads Are Back”, riffing older B-movies in front of live audiences. In the midst of the COVID-19 pandemic, Beaulieu and Conniff moved the show to a ticketed livestream format, offering monthly live-riffs of movies they had previously screened on tour including Glen or Glenda, The Tingler, and Walk The Dark Street.

Beaulieu appeared on Ken Reid’s TV Guidance Counselor podcast on June 16, 2016.