Research Scientist, Australia Telescope, National Facility. He was born in Kerastari, Tripolis, Greece on the 1st of May, 1952 and he migrated to Australia in 1970. He received his B.Sc. (Honors in Physics) from the University of Sydney, Australia (1976), the B.E. (Honors in Electrical Engineering - 1978) and the Ph.D. (1987) from the same University. He worked as a Postdoctoral Fellow at Jodrell Bank, U.K (1987- 90), and has been a staff member at the Australia Telescope National Facility since 1990. He is a member of the Astronomical Society of Australia, the Hellenic Astronomical Society (Hel.A.S.), the International Astronomical Union (IAU), the Union of Radio Science International (URSI) and COSPAR. He is involved in international radio spectrum management and he is chairman of Working Party 7D (WP7D) at the International Radiocommunications Union (ITU), chairman of the IAU Working group on RFI Mitigation, vice-chair of the scientific committee on frequency allocations for radio astronomy and space science (IUCAF) and chair of the Radio Astronomy Committee for Frequency Allocation in the Asia Pacific (RAFCAP). His main research interests are in high resolution radio astronomy using Very Long Baseline Interferometry (VLBI) techniques to study objects such as Active Galactic Nuclei (AGN) to X-ray Binaries. He is also involved in technical developments for real-time VLBI (e-VLBI) using very fast networks world-wide.