In May Zimmermann competed at the German Junior National Championships where she won the bronze medal in the all-around behind Emelie Petz and Sidney Hayn. Additionally she won the silver on vault and uneven bars, once again behind Petz, bronze on floor exercise behind Petz and Hayn, and placed sixth on balance beam. In June she competed at the Youth Olympic Qualifier where she placed thirteenth. The following month Zimmermann competed at a friendly competition in Pieve di Soligo where she helped Germany place fourth and individually she placed twentieth in the all-around. In August Zimmermann was selected to represent Germany at the 2018 European Championships alongside Petz, Emma Malewski, Lara Hinsberger, and Leonie Papke. Together they finished seventh in the team final. Individually Zimmermann was the second reserve for the vault final. Later in the year Zimmermann was selected to represent Germany at the 2018 Youth Olympic Games. While there she qualified to the all-around final and the vault final and was the first reserve for the uneven bars, balance beam, and floor exercise finals. She ended up placing twelfth in the all-around final and fifth in the vault final.
Senior
2019
In 2019 Zimmermann turned senior. She made her debut at the DTB Team Challenge where she placed eighth in the all-around and helped Germany finish fifth as a team. The following month she competed at the European Championships where she placed twenty-fourth in the all-around. In June Zimmermann competed at the Flanders International Team Challenge in Ghent, Belgium alongside Kim Ruoff, Lisa Schöniger, and Isabelle Stingl. Together they placed seventh in the team final. Individually Zimmermann placed twentieth in the all-around. In August Zimmermann competed at her first German National Championships as a senior elite where she placed eleventh in the all-around and third on vault behind Sarah Voss and Emelie Petz. As a result, Zimmermann qualified to competed at the World Trials for a chance to make the German team that would compete at the 2019 World Championships. At the World Trials she finished seventh in the all-around but recorded the second highest balance beam score. In September Zimmermann competed at a friendly competition in Worms, Germany where she helped Germany finish first as a team and individually she finished eighteenth in the all-around. Zimmermann ended the season competing at the Cottbus World Cup where she qualified to the vault and balance beam event finals. During event finals she placed seventh and sixth respectively.
