Dr.-Ing. Dimitrios Ampatzidis is an Associate Professor of Geodesy and Positioning in the Department of Surveying and Geoinformatics Engineering at the International Hellenic University (IHU), Greece. His research focuses on Terrestrial Reference Frames (TRFs), space geodesy, Global Navigation Satellite Systems (GNSS), Satellite Laser Ranging (SLR), and crustal deformation modeling. He graduated with a Diploma in Rural and Surveying Engineering from the Aristotle University of Thessaloniki (AUTH) in 2006, where he also completed his MSc in Modern Geodetic Applications (2007) and his PhD (2011). His doctoral thesis focused on optimizing geodetic reference system realizations in tectonically active areas. From 2014 to 2021, Dr. Ampatzidis conducted research at leading geoscientific institutions in Germany. At the GFZ German Research Centre for Geosciences (2014–2016), he analyzed global GPS networks and local ties at co-located stations. At the Federal Agency for Cartography and Geodesy (BKG, 2017–2021), he focused on the rigorous combination of space geodetic techniques for international reference frame maintenance. Currently at IHU, he teaches geometric geodesy, network adjustments, and satellite positioning. He serves as a peer reviewer for journals such as Survey Review and Earth Surface Dynamics and has contributed to international geoscientific committees.