Teus Hagen

[2] Later, he initiated the Dutch and the European Unix User Groups NLUUG and EUUG (that became later EURopen).

One of his team members, Daniel Karrenberg, is the author of the report in favor of TCP/IP for global networking in Europe.

[3] From 1992 to 2008 Hagen was chairman and director at NLnet and helped it to become the first Dutch Internet Service Provider.

In this position, Hagen became 2004 involved with the community-driven certificate authority CAcert.org and served as board member and in 2008 as president.

[2] Hagen was recognized by NLUUG[4] and Usenix for his open-source contributions and honoured as "Global Connector" in the Internet Hall of Fame in 2013.