Born in Belgium in September 1958.
Bachelor and PhD in Ecology.
40 years of experience in Entomology in Nicaragua. Teacher (1983 – 1988) at UNAN (National University of Nicaragua, Leon): Entomology, taxonomy, biological control of pests.
Founder and director of Entomological Museum of Leon (1987 – today), the collection has more than 500,000 specimens. The main goal is doing an inventory of the insects of Nicaragua, a first checklist published in 1998-1999 condensed information on 10,000 insect species (including terrestrial arthropods).
Around 300 publications on entomology, including some books and CD ROM.
Founder and director for 15 years of the French Alliance of Leon.
Founder member and actual president of NGO ALAS (Alianza para alas Areas Silvestres), a NGO devoted to conservation of Nature and study of birds. The NGO edited the first bird guide of Nicaragua.
Founder member of Science Academy of Nicaragua, member of “Education and Science Promotion Comission”.
Editor of “Revista Nicaraguense de Entomologia” (1987 – today).
Editor of “Revista Nicaraguense de Biodiversidad” (2015 – today).
The name “maesi” and “Maesia” in around 30 species and a genus given by colleagues.
Hobby: philately, mainly insect topic in stamps and on covers.