David is a playwright, screenwriter and actor from Belfast.

His first play, What the Animals Say, was produced at Oran Mor, Glasgow in 2011.

He was Playwright-in-Residence at the Lyric Theatre, Belfast in 2012.

He went on to win the Meyer Whitworth Award in 2012 for his second play, Everything Between Us, produced by Tinderbox Theatre Company in Belfast.

In 2016 Cyprus Avenue, starring Stephen Rea, opened at the Royal Court Theatre, London and the Abbey Theatre, Dublin, before transferring to the Public Theatre, New York. It won the Irish Times Award for Best New Play and the James Tait Black Award in 2017.

In 2018, Ulster American was produced at the Traverse Theatre as part of the Edinburgh Fringe. It won a Scotsman Fringe First and the Critics Award for Theatre in Scotland for Best New Play. Ulster American was revived by Second Half Productions at Riverside Studios, London in 2023 starring Woody Harrelson, Andy Serkis and Louisa Harland.

His other plays include Not Now, Sadie, Yes So I Said Yes, The End of Hope and Can't Forget About You.

His first TV series, The Lovers, was broadcast on Sky Atlantic in 2023. His new TV series, Cold Water, starring Andrew Lincoln, is currently in production and will be broadcast on ITV in 2025.

As an actor, he is best known for playing Clare's Dad in Derry Girls.

He lives in Glasgow with his wife Jennifer and two children, Ada and Elijah.