At the end of December he started at Belgian second division club United Overpelt-Lommel, only to resign two months later on 25 February after a series of bad results.
[2] In February 2009, he was promoted to the first team squad as an assistant coach to manager Harm van Veldhoven.
However, after a series of disappointing games, Trost and Roda JC decided to part ways on 7 April 2015.
[5] On 23 May 2017, Trost was appointed as interim manager of Roda JC together with Rick Plum, after the sacking of Yannis Anastasiou, with his task being to keep the club in the Eredivisie during the promotion/relegation play-offs.
[6] The duo managed to save Roda from relegation, but Trost left the club at the end of the season.