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Sina Held is currently an App-Analyst at CEWE Stiftung & Co. KGaA, a position held since February 2022. Previously, from October 2017 to September 2021, Sina served as a student assistant at Carl von Ossietzky Universität Oldenburg, working as a tutor in Analysis I, IIa, and Function Theory modules for dual-subject Bachelor's and specialized Bachelor's programs in Mathematics and Physics, while also supervising the Mathematics Learning Center. Sina obtained a Bachelor of Science in Mathematics from Carl von Ossietzky University of Oldenburg, completing the degree in December 2021 after starting studies there in 2015.