Rowley joined the MPS as an Assistant Commissioner in December 2011. He was awarded the Queen’s Police Medal in the same year.
In June 2014, Rowley was appointed former Assistant Commissioner for Specialist Operations (ACSO) in the Metropolitan Police Service. He announced his retirement from this position in January 2018.
In February 2018, he gave the Colin Cramphorn Memorial Lecture at Policy Exchange. his speech criticised 'so-called representative bodies' which he said 'speak out in such a way to create and exploit grievances and isolation, by: being equivocal in condemning acts of terrorism; undermining efforts to safeguard the young and vulnerable from radicalisation, and spreading disinformation about national security and foreign policy.
- Mark Rowley, RUS, accessed 4 March 2018.
- Harry Cockburn, Mark Rowley resigns: Met Police's head of counter-terrorism steps down, Independent, 9 January 2018.
- Extremism and Terrorism: The need for a whole society response, Policy Exchange, 26 February 2018.