He a member of Danish party Det Konservative Folkeparti.
Kristensen became a mason in 1973 and has been independent with his own masonry and construction business since 1975 which he founded.
Knud Kristensen is his party's labor, housing, animal welfare and food rapporteur and chairman of the Parliament's Labor Market Committee.
[1] He ran for mayor in the 2017 Municipality election but lost it to Per Bach Laursen.
The 29 January 2018 he retired from the city council and politics, because of health reasons, though he did not reject a future comeback.