(a) ICANN's technical and administrative responsibilities
Technical:
Sysadmin and network admin, moreover in charge of some security affairs; experience in programming as well.
Administrativ:
Experience in organizing IT-projects
(b) your leadership and policy-level roles
Leadership:
Founder of the Union of Citizens Networks ("the Union") in 1995
Vice president of "the Union" from 1995 till 1998
President of "the Union" since 1998; http://www.buerger.net
Founder and Chairman of "Foerderverein Buergernetz Schwindegg e.V." since 1995 (Educational part)
Founder and Vice Chairman of the "Traegerverein der Buergernetze...im Inn-Isen-Vils-Salzach-Kreis, http://www.iivs.de (Technical part)
Leader of different projects (eg. Buergernet in Russia, http://www.burgernet.chuvashia.com/index1.htm)
policy-level roles:
Expert of AG 2 of "Forum
Informationsgesellschaft" of the German Government
http://www.forum-informationsgesellschaft.de
speaker on many conferences and workshops in Germany and Europe, e.g. Multimedia-Congress of Goethe Institute Moscow.