Steven Lustü started his senior career with Næstved BK in the 1991–92 Superliga championship.

He made his debut for the Danish national team under manager Morten Olsen, in an August 2000 match against the Faroe Islands.

[2] He was included in the Danish squad for the 2002 FIFA World Cup, though he spent the entire tournament as an unused substitute.

[2] Steven Lustü moved back home to Denmark when he signed with Silkeborg in December 2006.

[8] On 18 January 2019, Lustü went back to Viborg FF, this time as the head coach of the U17 squad.