Customcells® Contact persons

At CUSTOMCELLS®, we are happy to be personally available to our clients and partners. Our employees are always at the heart of CUSTOMCELLS®. We practice a management concept with flat hierarchies that encourage exceptional commitment and give all our employees a high degree of personal responsibility.


  Yann-Erik Ritz       Kim-Sascia Milinowski       Stefan Roschinski      Jan Majchel        Dr. Anne Baasner       Jörg Scheele

Yann-Erik Ritz

Yann-Erik already worked in the automotive industry in the area of product strategy and project management parallel to his studies (mechanical engineering, B.Sc. and product development, M.Sc.) at the TU Hamburg. After his master's thesis in the field of recycling high-voltage batteries, he started at CUSTOMCELLS®. Since mid-2021, Yann-Erik has been working at CUSTOMCELLS® as a Project Planner with a focus on automotive projects.

Kim-Sascia Milinowski

Kim-Sascia Milinowski started her professional career as a retail saleswoman. After several years of permanent employment, she sought new challenges and acquired new knowledge and skills in various companies. At times, Kim worked as an office administrator, purchasing clerk and controller in the content area. Since the beginning of 2022, Kim has been working for CUSTOMCELLS® as a sales assistant.

Stefan Roschinski

After his studies in international business administration, Stefan specialised in the areas of marketing and sales. He gained his first professional experience at the Anschutz Entertainment Group, where he was involved in the restructuring of the sales department. Subsequently, Stefan worked for Johnson & Johnson Medical for seven years in various areas and functions. Since the beginning of 2022, Stefan has been responsible for sales and project planning at CUSTOMCELLS®.

Jan Majchel

At an early stage, Jan dedicated himself to future-oriented and sustainable energy use at the University of Kassel in Environmental Engineering (B.Sc.). With his subsequent studies in energy technology (M.Sc.) at the University of Stuttgart and his final thesis on optimised catalysts for water electrolysis, he turned to electrochemistry. This was followed by almost five years of research into new battery technologies at the German Aerospace Center (DLR) in Stuttgart. Since summer 2021, Jan has been strengthening the CUSTOMCELLS® sales team as a project planner.

Dr. Anne Baasner

Anne studied chemistry at the Technical University of Dresden. After synthesizing dyes for organic solar cells in her bachelor thesis at the Dresden Institute of Applied Photophysics (IAPP), she specialized in inorganic materials for energy storage in her master studies. During her master thesis and PhD at Fraunhofer IWS Dresden in the group of Dr. Holger Althues she developed silicon-carbon anode materials and investigated different silicon-based anodes in lithium-ion batteries. Since November 2019 she is working as a project planner at CUSTOMCELLS©.

Jörg Scheele

Jörg began his professional career as an aircraft electronics engineer at Deutsche Lufthansa AG. After graduating in business informatics and business administration, Jörg held various positions such as controlling, investor relations, sales and asset manager for international listed companies. Most recently, he worked for many years as Senior Analyst for Goldman Sachs before moving to CUSTOMCELLS® as Senior Sales Manager in May 2017.

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We are at your disposal by phone at +49 4821 – 133 92 00. Alternatively you write us your request gladly by Mail to contact(at) and we contact you promptly. By indicating the CUSTOMCELLS® contact person of your choice, we will forward your enquiry directly to the person responsible.