 He spent four years as an officer in Northern Ireland, two years as an instructor at the Infantry Training Centre, Catterick, two years on ceremonial duties in London, and a further two years in Tidworth, working in an office 100 yards from where he was born.After completing ten years of service, Mayer left the army, decided to become an actor, and entered the Guildhall School of Music & Drama in 2002.In writer/director Daniel Hsia's feature film "Shanghai Calling" (2012) Mayer plays the supporting role of Jensen.