Management Board

Dr. Christian Polster

Managing Director
Dr. Christian Polster is one of the company founders and known for being an experienced strategist who brings in more than 20 years working in IT Security, as well as a strong customer perspective for the product portfolio including compliance topics. He worked in the global IT Management division of Lufthansa and in several positions at CSM Security Management AG and SurfControl plc. Polster studied Business Informatics at Vienna University of Technology, Technical University of Madrid, and Business Administration at Vienna University of Business, London School of Economics (LSE), HEC Paris and Singapore Management University (SMU). He received his doctoral degree in strategic finance.

Lothar Hänsler

Security Operations & Delivery Officer

With a professional track record of more than 35 years, Lothar Hänsler held various IT management positions in Germany, the United States and Singapore. Before joining RADAR, Lothar Hänsler was Head of Cybersecurity at Rolls Royce Power Systems AG, a division of Rolls-Royce plc. In his previous job he was in charge of building up a Cyber Defence Center. Hänsler holds a degree in Business Administration from Pforzheim University and is a known speaker at relevant industry events.

Alexis Kahr

Head of Sales
Alexis Kahr is responsible for international sales at Materna Radar Cyber Security and working with the management board to drive forward the company’s strategic positioning on the market. He contributes his 25+ years of international IT and IT security experience. In the past, Kahr has worked for leading brands such as Cisco, Dell and McAfee. In addition to his studies at the International Institute for Management Development (IMD) in Lausanne, he completed a master’s degree in Circular Economy and Sustainability Management at the University of Graz.

Michael Stelzhammer

Head of Enablement Services
Michael Stelzhammer is known for his innovative and visionary mind in the development of human resources. He has a long history at Materna Radar Cyber Security and currently supports the company as the overarching head of the Enablement Services department. This includes finance & controlling, legal services, human resources and procurement. In previous years, he worked for the HR DACH region and as a consultant in international corporations. Born in Vienna, he completed his studies at the Vienna University of Business and Economics (WU) as well as the University of Applied Sciences Vienna (FH Wien WKW).