The decision, announced on Tuesday, came after Werner revealed he would not extend his contract beyond its 2026 expiry, prompting the club to act swiftly to ensure stability.
The Green-Whites, eighth in the Bundesliga at season end and just one point shy of a European spot, have prioritised long-term clarity. "We deeply regret Ole's decision, as we envisioned a long-term partnership," said Clemens Fritz, Bremen's managing director for sport.
"However, continuity and clarity in the head coach role are vital. Squad planning and the club's future direction demand stability, which is challenging without certainty over leadership. The supervisory board unanimously backed this move."
Werner, 37, had been instrumental in steadying Bremen since taking charge in November 2021, when the club were languishing in the 2. Bundesliga. Under his guidance, they secured promotion in 2022 and re-established themselves as a competitive Bundesliga side.
Reflecting on his departure, Werner said: "It was a tough call not to extend my contract. My role has always been about developing a club, but sometimes progress requires change, either around the coach or the coach himself. After four and a half years, I felt a shift was needed. I understand Bremen's perspective and cherish my time here with an incredible staff and squad."
The club expressed gratitude for Werner's contributions. "We're thankful for Ole's outstanding work," Fritz added. "He stabilised us in the Bundesliga and built a strong foundation. It was a trusting and productive partnership."
Speculation over Werner's replacement is rife, with Elversberg's Horst Steffen emerging as a leading candidate. The 56-year-old, who recently guided Elversberg to the Bundesliga promotion/relegation play-off, declined to comment on the rumours after their defeat to Heidenheim, saying only, "No comment" when pressed about his future.
Other names in the frame include Christian Titz and Sandro Wagner, as Bremen look to maintain their upward trajectory.
Bremen's squad, boasting talents like Marvin Ducksch, who has attracted interest from Panathinaikos and Besiktas, now face a pivotal transition. With the club just outside the European places, the incoming manager will inherit a team brimming with potential but in need of direction to sustain their momentum.
As the Green-Whites prepare for their next chapter, fans will be eager to see who takes the helm and how the team builds on Werner's legacy. For now, the focus is on finding a leader to steer Bremen toward a brighter future in the Bundesliga.