After retiring in 2007 at the age of 35, he worked both as a youth coach and as a sporting director for Tampere United between 2008 and 2009. He also managed the Finnish under-15 football team. On 29 October 2010 it was announced that Wiss had succeeded the longtime
head coach Ari Hjelm at Tampere United. He signed a two-year contract, with an option for a two-year extension, with the club on the same day. However, the club was banned from competition for the 2011 season. Wiss was the manager of
Finland national under-18 football team since 1 January 2014. On 6 November 2015 it was announced that Wiss is taking the head coach position at
Ilves starting on 1 January 2016. On 23 September 2022, Wiss signed a contract with
Inter Turku as a manager for 2023 and 2024 seasons, with an option for an additional year. On 6 November 2023, after one season with the club, Wiss was fired due to a harassment incident. On 13 August 2024, it was reported in Finnish media that Wiss would start as the new manager of
Kuopion Palloseura (KuPS) for the
2025 Veikkausliiga season, a move the club confirmed two days later. Tomi Erola, the CEO of KuPS, stated that the club's values were made clear to Wiss, emphasizing that the club believed no one should be judged definitively for past mistakes. His tenure in Kuopio culminated in a highly successful 2025 season, where he guided the club the
Veikkausliiga title, characterized by a dominant defensive record throughout the campaign. Despite the championship success, the club announced in November 2025 that Wiss would depart at the end of the year following the conclusion of his contract.
SJK On 21 December 2025, it was officially announced that Wiss would take over as the head coach of
SJK for the 2026 season. He was tasked with rebuilding the squad to challenge for European spots, bringing in a wealth of experience from his previous championship-winning seasons. His first official matches with SJK took place in the
2026 Liigacup during the pre-season winter months. == Career statistics ==