Christiansen has competed in four Paralympics starting in 2000 in Sydney, Australia where he finished sixth in the shot put for F44 athletes.

He won the F42/44 shot put gold medal at the 2012 Summer Paralympics in London.

Jackie Christiansen holds the world shot put record in the F44 class with 18.38 m (60.3 ft) set 21 August 2011 in Olomouc, Czech Republic.

In February 2016, Christiansen announced the end of his active sports career as his shot put disability class wasn't on the programme for the Paralympic Games in Rio 2016.

This biographical article relating to Danish athletics and track and field is a stub.