Lyman Chapin is a founding principal at Interisle Consulting Group.

He was most recently Chief Scientist at NextHop Technologies, an Internet routing software company. Before joining NextHop in 2001, he was Chief Scientist at BBN Technologies.

Mr. Chapin is a Fellow of the IEEE and currently serves as the USA representative to the International Federation for Information Processing (IFIP) Technical Committee on Communication Systems (TC6) and to the NATO Science Committee's networking panel. He was a founding trustee of the Internet Society, and has served as a Director of the Internet Corporation for Assigned Names and Numbers (ICANN) and as chairman of the Internet Architecture Board (IAB), the ACM Special Interest Group on Data Communication (SIGCOMM), and the ANSI and ISO standards groups responsible for Network and Transport layer standards.

Mr. Chapin was a principal architect of the Open Systems Interconnection (OSI) model and protocols, and is the co-author of Open Systems Networking—TCP/IP and OSI, which was published in 1993 by Addison-Wesley.