Nørret became a professional golfer in 1999 at the relatively late age of 25, after he had spent time studying in both Denmark and the United States.

He immediately joined the second-tier Challenge Tour and found instant success, posting two runners-up finishes in his debut season and finishing 25th in the final standings, just outside the automatic qualifiers for the European Tour.

Nørret became a Challenge Tour regular over the following seasons, claiming his first win in 2002 at the Volvo Finnish Open[1] after a six-month break, but never improved on his 1999 performance, and in 2009 he took a break from tournament golf to manage young players, returning only for a few events in 2006 and 2009.

At the 2011 Austrian Golf Open on the European Tour, Nørret took a two stroke lead into the final round after shooting 9-under-par over the first three days.

[2] He then shot a final round level par to finish solo fourth, his best result on the European Tour so far.