
All three received an official farewell at the last home game of the season against Schalke 04. The two managing directors Fernando Carro and Rudi Völler thanked the trio for their commitment to Bayer 04.
Jonas Boldt worked for the Werkself for a total of 15 years. It began in 2003 with a placement; in 2007 the man from Nuremberg joined the scouting department. As a scout, head scout, sporting manager and finally sporting director – the 37-year-old has played a significant part in all the transfers in recent years thus making a contribution to the success of the Werkself. At the end of November last year, Jonas Boldt decided to leave his post as sporting director and the club at the end of the season.

While Boldt leaves Bayer 04 after a long stay, Isaac Kiese Thelin and Thorsten Kirschbaum only moved to Leverkusen in the summer of 2018. Kiese Thelin joined the Werkself from Anderlecht on a season-long loan. Last term the Sweden striker made 14 appearances in all competitions and scored one goal.
Goalkeeper Thorsten Kirschbaum also leaves the club after one season. The 32-year-old was the third choice shot-stopper in this campaign behind Lukas Hradecky and Ramazan Özcan. In the middle of December the number 24 made his competitive debut for the Black and Reds in the 5-1 win at AEK Larnaca in the Europa League – it was also Kirschbaum’s first game in a European cup competition.

Strengthening the Bayer 04 Leverkusen youth teams: Konstantinos Kotsifakis will join the Werkself from Bundesliga 2 club Hertha Berlin for the 2026/27 season, where he will be a permanent member of the Leverkusen U19 coaching set-up. The German-Greek will also take on an operational role in coaching the Bayer 04 Future Team. The 29-year-old was most recently head coach of the U17s at Hertha Berlin.
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Another award for the Bayer 04 head groundsman and staff: After coming top in the 2021/22, 2022/23 and 2024/25 seasons, the BayArena pitch came second in the Bundesliga Pitch of the Year ranking for the 2025/26 season. VfL Wolfsburg secured the top spot this year, with TSG Hoffenheim in third place.
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Opening opponents, derby weekends, the opponents in the season finale: This information and more will be available to Bayer 04 fans on Thursday, 2 July, when the 2026/27 Bundesliga fixture list is published.
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Rüdiger Vollborn has been at the club for 40 years, he holds the record number of Bundesliga appearances for the club (401) and is the only Bayer 04 player to have won both the UEFA Cup (1988) and the DFB Pokal (1993). And the Berliner stayed with the Werkself after ending his impressive playing career as he worked as a goalkeeping coach for the following nine years. Vollborn now works under the Bayer Cross as a fan liaison officer and club archivist. Since February 2021, the personal Black and Red lexicon takes Werkself fans under the heading of 'Rudi recounts...' on a brief trip through the history of Bayer 04 every month…
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