
Between 2014 and 2016 Maas, who played for Arminia Bielefeld and Hertha Berlin in the Bundesliga plus MSV Duisburg in the second division, was assistant coach to the current Bayer 04 head coach Peter Bosz. They were in charge at Dutch club Vitesse Arnhem for a total of 62 games in the Eredivisie. “In Rob Maas, we’ve appointed an innovative and strong-minded assistant coach who fits in really well here. He knows the Bundesliga and has already worked successfully with Peter Bosz. Rob will provide new ideas,” declared sporting director Simon Rolfes.
For Rob Maas, Bayer 04 are “a highly ambitious and very attractive club. That’s not just the perception in Germany but Leverkusen also have an outstanding reputation across Europe,” said Maas. “To be able to work with fellow coaches in developing an extremely exciting team is a fantastic challenge I’m really looking forward to.”

The German Football Association (DFB) has officially recognised Bayer 04 as a women’s talent support centre. As announced by the DFB, 1 FC Köln, Union Berlin, RB Leipzig and Hamburger SV are also certified as performance or talent support centres from 1 January 2026 in addition to the Werkself.
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Werkself-TV shows the highlights of the Bayer 04 women's 0-1 loss at Werder Bremen on the 13th matchday of the Google Pixel Frauen-Bundesliga 2025/26.
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Bayer 04 Women suffered a setback at the halfway point of the Google Pixel Women's Bundesliga. In a battle of the chasing pack between the teams in third and fourth, coach Roberto Pätzold's side lost 1-0 at SV Werder Bremen in a physical contest. The result leaves the Werkself on 22 points after 13 matchdays and now four points behind Bremen.
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The penultimate Bundesliga matchday of the calendar year marks the end of an eventful first half of the season for the Bayer 04 Women. After seven wins, one draw and four defeats from the first twelve games of the season, coach Roberto Pätzold's team can go above Werder Bremen in the table with a win on Friday, 12 December (kick-off: 18:30 CET).
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