He has previously played in Denmark for GOG and Skjern Håndbold, and german side SG Flensburg-Handewitt.

He was part of SG Flensburg-Handewitt team that won the 2013–14 EHF Champions League trophy.

[2] Eggert made his debut for the Denmark men's national handball team in 2003.

He became European Champion with the Danish team after winning the 2012 Championship in Serbia, defeating the host nation in the final, 21–19.

In 2011 he was a part of the team that won the silver medal at the World Championships in Sweden.