Since his retirement, Geyer has written extensively about rugby league for various newspapers and sporting magazines. In May 2010, he spoke out about his mid career drug and alcohol battle that lasted from 1992 to 1995 and how it almost ended his career. He said a large part of the drug usage was to simply trying to numb the pain of losing his best mate, former Penrith player
Ben Alexander, who was killed in a car accident in 1992. Geyer was a regular panellist on rugby league talk show
The Sunday Roast where he referred himself as 'the man of the people'. He was on
Triple M Sydney, as a breakfast presenter on The
Grill Team Monday-to-Friday 6-9am with
Matthew Johns and
Gus Worland from August 2009 to 2017. He also appears on Triple M on Saturday mornings, presenting the 'Dead Set Legends' segment alongside
Ray Warren. In 2012, it was announced that Geyer joined
Fox Sports Australia as part of their Rugby League coverage. He is a regular pundit on
NRL on FOX. Geyer is actively involved in a number of charities, such as the Fight For Life charity boxing event, he is the ambassador for the Save Our Sons charity. In response to the
2010–2011 Queensland floods, Geyer organised the
2011 Legends of Origin charity match which raised $455,345 for the recovery effort. On Australia Day 2013, Mark was announced in the Honours List. He received an
Order of Australia medal for "service to the sport of Rugby League football, and to the community through a range of charitable organisations." In November 2017, Geyer announced that he would be leaving The
Grill Team. He heads The Rush Hour on the same network. In August 2019, Geyer claimed on Triple M's the Rush Hour that within 10 years at least one Sydney team in the
NRL would no longer exist. Geyer went on to say "They will be extinct, they will die a slow death. We have too many teams in Sydney, it’s as simple as that". Geyer then suggested that the
NRL introduce a controversial KPI target system where Sydney clubs were measured on sponsorship dollars, average crowd figures, on-field success and their dedication to junior and grassroots rugby league. Geyer went on to explain about the KPI system saying "I don’t know how they would do it, there’s brainier guys than me at the moment, people who get paid to do this, but after five years, the club with the lowest points, guess what, they move to the Central Coast". Geyer co-hosted Sydney Triple M's weekday breakfast show
MG, Jess and Pagey until 25 November 2022, and co-hosted the station's replacement breakfast show
Mick and MG in the Morning with
Mick Molloy in 2023/24. He departed Triple M in November 2024. ==Personal life==