Dr Ehrmann is Director of Technology at the Brien Holden Vision Institute. He also holds a visiting appointment at the University of New South Wales through the School of Optometry and Vision Science. His professional qualifications include a BEng awarded from the Aalen University of Applied Sciences, Germany (1986); an MSc in machine design from the Cranfield University, UK (1988) and a PhD in Biomedical Engineering from the University of New South Wales (1997).
He has held engineering R&D positions in the USA, Israel, Germany, Australia and the UK. Prior to joining the University of New South Wales for his Doctoral degree, he worked for several years for the National Physical Measurement Laboratory in Germany. For the last 17 years Dr Ehrmann has been responsible for instrument development and metrology at the Brien Holden Vision Institute, Sydney, Australia. He has received numerous awards for his innovative ideas, has published over 40 peer-reviewed articles, and holds a number of contact lens and instrumentation related patents. His interests concentrate on developing innovative methods for contact lens and vision related measurements.