He is known for his role of statistical genius Sylvester Dodd in the CBS drama series Scorpion.

[4][5] Stidham broke into acting in 2010, with the character Ian in ABC Family television series Huge, based on a novel of the same name which centered around eight teenagers who had been sent to a weight loss camp.

Additionally, through his production company Stidley Inc., he produces "short form alternative comedy" with Zach Green, including a monthly love comedy radio play Dick Duquesne: Tales of a Private Dick.

He directed their flagship feature, Curse of the Siren, which premiered at Fangoria Fearcon in 2016.

[9] Re-enactments and recitals of 'The Raven', 'The Tell-Tale Heart' and 'The Fall of the House of Usher', were directed by and featured original songs by Stidham.