2003, WC Sydney, Australia
Prof. Perry Sprawls, USA

2006, WC, Seoul, Korea
Dr. Slavik Tabakov, UK

2009, WC, Munich, Germany
Dr. Madan Rehani, IAEA, Austria

2012, WC, Beijing, China
Dr. Ahmed Meghzifene, IAEA, Austria

2015, WC, Toronto, Canada
Prof. William Hendee, USA

2018, WC, Prague, Czech Republic
Prof. Anchali Krisanachinda, Thailand

2022
Prof. George Starkschall, USA