He was the owner of the now defunct Michelin starred restaurant Mint in Dublin which closed as a result of the economic downturn.
In August 2010 he opened 'Rustic Stone Restaurant by Dylan McGrath' on South Great George's Street in Dublin's city centre.
McGrath appeared on the television series, Guerrilla Gourmet, which was broadcast on RTÉ One in early 2008.
The premise of the programme was that professional chefs set up temporary "guerrilla restaurants" at an unusual location of their own choosing.
[3] He chose a dark room in the Royal Hospital Kilmainham in Dublin as his temporary restaurant venue, serving a menu of lemongrass and pomegranate dessert.