He co-wrote the psychological horror feature The Taking of Deborah Logan (2014) [1] and Paramount's Paranormal Activity: The Ghost Dimension (2015)[2] with writing partner Adam Robitel.

Also known for directing experimental visual works, primarily timelapse,[5] featured in the Rolling Stones' 2015 Zip Code Tour[6] as well as their 2016 Desert Trip shows.

Though budgeted at a meagre $10,000, Expiration was awarded the Grand Jury Prize in Toronto at the 2004 Canadian Filmmakers' Festival, received a 76% critic score on Rotten Tomatoes,[7] and acclaim from publications Variety,[8] and Ain't it Cool News.

Variety announced in October 2011 that Heffernan was attached to co-write the screen adaptation of Ray Manzarek's The Poet in Exile, a novel exploring the notion that Jim Morrison of the Doors staged his death in 1971.

In 2015, Heffernan and Harun Mehmedinovic co-founded SKYGLOW, a crowdfunded book and Blu Ray project to tackle the rising danger and damage of urban light pollution.