Dr.-Ing. Friedrich Kießling: Former Scientific Advisor and Head of Rail Electrification Engineering Department at Siemens AG, Transportation Systems. About 50 years of professional experience, convenor and member of CENELEC and IEC standardisation bodies, convenor of TSI working group for the Energy subsystem. Author of numerous publications on traction power supply systems.

Dipl.-Ing. Rainer Puschmann: Chief Expert at Expert Consultancy, former Head of Design, After Sales Services and Engineering Segments at Siemens AG, Transportation Systems, and SPL Powerlines Group. Certified expert for design reviews and acceptances at Railway Federal Authority and Railway CERT. Author of many publications on overhead contact lines and traction power supply systems.

Dr.-Ing. Axel Schmieder: Siemens AG, Mobility Division, Rail Electrification Segment, Principal Key Expert and Independent Auditor for contact lines, former activities at Deutsche Reichsbahn and Deutsche Bahn for Railway Electrification. About 40 years experience in this field. Convenor and member of IEC, CENELEC and DKE standardisation groups. Author of many books and articles on rail electrification.

Dr.-Ing. Egid Schneider: Former Senior Engineer at Siemens, Transportation Systems, and experienced in design and development of traction power supplies for 25 years. Convenor and member of several CENELEC and IEC standardization groups. Author of numerous publications on traction power supply systems.
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