He played Pa Kettle on Syfy's Z Nation, Zepht on Star Trek: Enterprise, and has appeared in several soap operas, including Days of Our Lives and The Young and the Restless.

[2] After the decline of Vaudeville his grandmother, Grace Hathaway, performed in burlesque and his grandfather, Joe Miller, became known in San Francisco for his talks at the Theosophy Lodge and weekly group walks through Golden Gate Park.

He performed in community theatre in San Jose and Walnut Creek, and after getting his GED his Ygnacio Valley High School drama teacher encouraged him to pursue his acting dream.

Douglas graduated from the Estelle Harman Actors Workshop,[6] the only accredited acting trade school in Los Angeles at the time.

He produced Some Things You Need to Know Before the World Ends (A Final Evening with the Illuminati) at the Hollywood United Methodist Church, performing as Brother Lawrence opposite Theatre of NOTE co-founder Kevin Carr in a benefit for the AIDS Healthcare Foundation.

Notable appearances include 24, Star Trek: Enterprise, NYPD Blue, ER, Charmed, Without a Trace, NCIS, Criminal Minds, Castle, and The Encounter.

In 2015, while pitching a film project to The Asylum that would pay homage to Resident Evil 5, a video game Douglas had worked on and gained fan appreciation for, the producers were inspired to cast him as Pa Kettle in Z Nation, a Syfy zombie series, for a three-episode arc.

Notable film roles include a possessed ghost hunter in Black Ops with Lance Henriksen, a disturbing turn as "Dad" in Smartass with Joey King, a deranged cop in Helen Alone with Priscilla Barnes, and a harried producer in Labor Pains with Lindsay Lohan.

In 2013, Douglas was cast as a serial killer in Apocalypse Kiss and altered his appearance to resemble Resident Evil villain Albert Wesker, as the producers were fans of his work in the video game franchise.

He later wrote, produced, and directed The Eighth Plane, an anti-Scientology short, and Freud and Darwin Sitting in a Tree, about Lewis Henry Morgan.

In 2001, he resurrected the character 'Lance Baxter' from Falling Words and created a cabaret act covering sad love songs that illustrated his dysfunctional relationships.

In 2016, he wrote, edited, and directed the Halloween animated short Ginger & Snapper with Rachael Leone, featuring voice actors Lacey Chabert, Steve Blum, Liam O'Brien, Laura Bailey, and Roger Craig Smith.

Guest voice actors have included Steve Blum, Maurice LaMarche, Mary Elizabeth McGlynn, Todd Haberkorn and Mark Meer, among others.

[21] Douglas began his voice acting career in the early 1990s by providing walla for low budget action and erotic films that were usually aired late night on Showtime.

He has cited that job as the turning point in his voiceover career, as he used the money from that contract to build his home studio, which was uncommon for voice artists at the time.

In April 2010, Douglas faced criticism from the Tea Party movement for a phone call he made to Freedomworks in which he left an inflammatory voice mail.