Brian Riemer (born 22 September 1978) is a Danish football coach who serves as manager of the Denmark national football team.
Riemer had previously managed Anderlecht after serving for four years as assistant coach at Brentford to Thomas Frank. Prior to Brentford, he was an assistant in the Danish league with FC Copenhagen.
During his time at Hvidovre, Riemer also had a brief spell as a technical youth coach at Norwich City while still in his mid-twenties, working part-time while still coaching in Denmark.
He stepped up following the sacking of Tom Nielsen to take charge of the Hvidovre first team in November 2008 for their final two First Division games of the year before the winter break, winning both - 2–0 away at Nykøbing and 4–1 at Køge BK.
Riemer then moved to the capital to take up the same youth and development role at FC Copenhagen in 2009.
The decision of then Copenhagen assistant coach Johan Lange to move with Ståle Solbakken to Wolves saw new FCK boss Ariël Jacobs promote Riemer from Under-19 coach to be his assistant for the senior team.
Copenhagen won the 2012–13 Danish Superliga title in their first season under Jacobs and Riemer, qualifying them for the 2013–14 UEFA Champions League. But five winless games into the next campaign, Jacobs was sacked with Copenhagen near the bottom, prompting the return of Solbakken.
Riemer was retained as assistant coach by Solbakken, and FC Copenhagen finished second over the next two seasons. In 2015, Riemer returned to duties as Copenhagen youth coach at his request, and stayed in this position for another three years. Riemer's position as assistant coach was given to Peter Wettergren.
Together, Frank and Riemer helped Brentford to promotion in the 2020–21 EFL Championship, guiding the Bees to their first English top-flight campaign since 1946–47. The 2021–22 Premier League saw them finish 13th, closer in points to the European places than the relegation spots. Reimer departed midway through Brentford's second season in the Premier League.
However, he struggled to get the Brussels club away from the relegation zone until the final few weeks of the season, with the Mauves finishing 11th in the 2022–23 Belgian Pro League, their lowest finish since 1937.
Making a series of ambitious signings during the summer 2023 transfer window, including Anders Dreyer, Kasper Dolberg, Thomas Delaney, Kasper Schmeichel and Thorgan Hazard, Anderlecht had pushed their way up to second in the league table by Christmas 2023, on the way to building their first proper title challenge since last winning the league in 2017.
Because Riemer's first league game for Anderlecht was played on 26 December 2022 and he spent Christmas alone in Brussels, he was allowed fly home to Denmark on Christmas Eve the following year to spend Christmas with his family, before returning on the 26th for the traditional Boxing Day game against Cercle Brugge, which Anderlecht won 2–0.
Anderlecht finished third in the 2023–24 Belgian Pro League season, still in with a chance of winning the title on the final day, but losing 3–1 away to Royal Antwerp. It was Anderlecht's best finish since 2021.
Riemer was sacked on 19 September 2024 due to what the club called their "insufficient performance", despite being fourth at the time of Riemer's sacking, having just suffered their first league defeat of the season at the hands of league leaders Racing Genk in a game that would have put them top had they won. The Mauves were unbeaten in their first six matches prior to this and had led for much of the campaign up to this point. This defeat meaning Anderlecht had picked up one point from their last three games.
On 23 March 2025, he led Denmark to the Nations League quarter-finals, which ended in a 5–3 aggregate loss for Denmark after extra time against Portugal; this was the first time that Denmark had qualified for the knockout stage of the UEFA Nations League. His contract with the national team was extended in October2025, with the new agreement to extend until 2028.
| + Managerial record by team and tenure | ||
| Hvidovre IF (interim) | 10 November 2008 | 31 December 2008 |
| Anderlecht | 2 December 2022 | 19 September 2024 |
| Denmark | 24 October 2024 | present |
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