Peter's collecting interest revolves around the islands of the Caribbean and the South Atlantic. His enthusiasm is easily reflected in his service of co-editing and co-authoring numerous books and articles relating to this field.
Peter is known as an ambassador to the philatelic community through his hands-on approach towards organized philately. In the realm of exhibitions, he is a nationally accredited chief judge with the American Philatelic Society (APS) having judged over 125 shows since 1986. Also, he has been the APS delegate to the F.I.P. from 1997 to 2005. Internationally, he is currently serving as the Vice President of the F.I.P., a position held since 2004. As a collector, he has managed to win three national grand awards with different exhibits.
In addition to his work in exhibitions, he has also held numerous positions within the APS, including the positions of Vice President and ultimately President for two terms until 2003 after which he continued to serve on the board. He also served as the Co-Chairman of the Council of Philatelists of the Smithsonian National Postal Museum.
Over the years, Peter has been awarded by various organizations for his service to philately. These awards include being a Fellow of the Royal Philatelic Society London and Royal Philatelic Society of Canada, the APS Luff Award (2008), the Eugene Klein Memorial Award, and the Collectors Club New York Alfred F. Lichtenstein Award (2010), among others. This culminated to his signing of the Roll of Distinguished Philatelists in 2007 – the penultimate honor in world philately.