Marku burst on to the higher echelons of the strongman circuit when he won the England's Strongest Man competition in 2006.

In that same year he competed at both the Britain's Strongest Man ("BSM") finals and in the UKSC where he went one better than in 2006, coming second (again to Glenn Ross).

That year he participated in the qualifying round of the 2007 World's Strongest Man contest, finishing third by half a point in Group 4 behind the eventual winner Mariusz Pudzianowski and Dave Ostlund.

The BSM win secured him an invitation to the 2008 World's Strongest Man contest.

On 1 June 2011, Marku was stopped by police who found a large quantity of marijuana in the boot of his car.