Gregor has worked as a writer and producer for the BBC and in the independent sector. Based in Glasgow, he has acted as executive producer on a range of titles including This Country, Inside No. 9 and Ghosts, and commissions comedy from across the UK. He began his career as a researcher at Scottish Television before becoming a director working across Arts, Current Affairs and Childrens. He then began to specialize in Comedy, becoming an Executive Producer at BBC Scotland and developing and writing his own projects, including 5 series of the award winning comedy Two Doors Down (with Simon Carlyle). He has been working as a commissioning editor at BBC Comedy since 2011.