stefferud was active in arpa/nsf/ietf darpa internet research and development since 1975. he was involved in pre-standards work for x.400/x.500 in the international federation for information processing (ifip) wg 6.5, and post-standards profiling in the national institute of standards and technology oiw. he was involved in the us ansi osi registration authority; the us national mail transfer service interest group (usmts) and the ietf (internet engineering task force) where he has been involved with email standards development (e.g. mime, smtp extensions and mhtml). he was chair of ifip working group 6.5 on upper layer protocols, architectures and applications (ulpaa) from 1990 to 1996. he served as chair of the 1988, 1990, 1992, 1994 ifip wg 6.5 ulpaa conferences.