Lidmaatschappen
- Wiesbadener Briefmarkensammler-Verein von 1885 e.V (WBSV) since 1979
- ArGe Niederlande e.V. since 1984
- Deutscher Altbrief-Sammler-Verein e.V. since 1987
- Po & Po since ca. 1988
- Royal Philatelic Society of London since 2000
- Postzegelvereniging De Kanaalstreek since 2004
- AIJP since 2009
Functies:
- Head of the youth group WBSV: 1982-2002
- Member of the board of WBSV: 1982-2015
- Chairman of the Board of WBSV: 2007-2015
- Member of the board of the Hessian Youth Stamp Association (treasurer): 1984-2000
- Manager of the NASSAU-PHILA 2010 (regional exhibition) and various other exhibitions in
- Wiesbaden and the surrounding area
- Vice-Chairman and secretary ArGe Niederlande e.V. 2003 – 2015 Chairman and secretary ArGe Niederlande e.V. since 2015
Verzamelgebieden:
- Netherlands Prephilately
- Netherlands Postage Due Stamps Curacao/Suriname postal censorship WWII
Tentoonstelllingen:
- Large Gold international for “The Netherlands postmarks, from the first to 1813/4”
- Large Vermeil national for „Portomarken Niederlande“
Publicaties:
Various articles in “Nederland onder de loep”