Thas received in 1969 his PhD from Ghent University under Julien Bilo with thesis Een studie betreffende de projective rechte over de totale matrix algebra
In 1998 he gave an invited address at the International Congress of Mathematicians in Berlin with lecture Finite geometries, varieties and codes.
[3] He received in 1969 the prize of the Royal Academy of Sciences, Letters and Fine Arts of Belgium, in 1970 the Scientific Louis Empain Award and in the same year the François Deruyts prize of the Royal Academy of Belgium.
In 1999 he was awarded an Erskine Fellowship of the University of Canterbury, New Zealand, in 2008 he was Platinum Jubilee Lecturer at the Indian Statistical Institute, and in 2012 he became one of the inaugural fellows of the American Mathematical Society.
[4] Recipient, Grand Officer of the Order of Leopold (Belgium)(Grootofficier in de Leopoldsorde) (2012) (For a complete list of papers see Homepage in Ghent.)