Hans-Joachim Ziems, Chief Restructuring Officer (CRO) at OQ Chemicals, is an expert in restructuring and corporate management.

Ziems has led major restructuring projects for companies such as Leoni, Kathrein, ATU, IVG, Kirch Media Group and Pfleiderer. He holds a degree in Business Administration from the University of Cologne.

Elmar Geissinger is a corporate finance expert who has served as CFO at companies such as ratiopharm, Pfleiderer, IVG, ATU and Kathrein in recent years. He was appointed as CFO in July 2024.

Elmar Geissinger holds a Diploma in Business Administration from the University of Regensburg as well as a European Master of Business Science from Birmingham University.