Clement A. Ogaja has worked in various capacities as a professor, researcher and geodesist in the United States, Australia, and Kenya. He earned a B.Sc. in Surveying from the University of Nairobi in 1997 and a Ph.D. in Geomatics Engineering from UNSW Sydney, Australia, in 2002. In addition to his three books, Geomatics Engineering: A Practical Guide to Project Design (CRC Press), Applied GPS for Engineers and Project Managers (ASCE Press), and Introduction to GNSS Geodesy: Foundations of Precise Positioning Using Global Navigation Satellite Systems (Springer), he is author and co-author of several research papers published in international scientific journals and conference proceedings. He has extensive experiences in education, research and private industry having worked for Geoscience Australia, California State University, Topcon Positioning Systems, NOAA’s National Geodetic Survey and as a land surveyor with Aerophoto Systems Engineering Company in Kenya. Dr. Ogaja’s primary interest is researching the applications of GPS/GNSS and Geomatics technologies to solving engineering and societal problems. Nashon J. Adero, a lecturer at Taita Taveta University, Kenya, is a geospatial and systems modelling expert. He teaches core units of Engineering Surveying, Mine Surveying and GIS, and support courses in facility management, sustainability, communication in science and engineering, and research methodology. He has acquired extensive cross-sector experience as a tunnel surveyor, a GIS manager, and a lead consultant for government agencies and private organizations. He also trained and worked as a policy analyst at the Kenya Institute for Public Policy Research and Analysis (KIPPRA), under a postgraduate training program in economic modeling and public policy research and analysis. His doctoral research at the Technical University and Mining Academy at Freiberg focused on mining surveys and geospatial models for mine planning. He earned an M.Sc. in Resources Engineering from Karlsruhe Institute of Technology (KIT) in 2006 and B.Sc. (Hons.) in Surveying from the University of Nairobi in 2000. He is author, co-author, and co-editor of articles, books and book chapters, conference proceedings, policy papers, technical reports, and media articles on geospatial technologies, environmental sustainability, decision support models, and skills development. In 2021, he co-edited The Future of Africa in the Post-COVID-19 World, a peer-reviewed book. Derrick Koome earneda BSc (Geospatial Engineering) from University of Nairobi. He briefly worked in a busy Geospatial firm in Nairobi (Nile Surveys and Geo-solutions) and by the time he left he was its Chief Surveyor. He started his own land survey practice soon after (Cheswick Surveys) which is based in the outskirts of Nairobi, Kenya. Koome is a live wire with use of geodetic GPS and Total Stations as well as all the geometric calculations and software involved. When his eye is not behind a telescope, he loves to write articles about surveying. One of these articles was republished in an Australian magazine.
