what's the duty of wizards?

[c-aries <babyaries2@gmail.com>]

Hi all!
When I read the "Debian's Organizational Structure" at http://www.debian.org/intro/organization.en.html , I am confuse about the role "wizard".

Just like below:

Release Management -- <debian-release@lists.debian.org>

    * Release Team --
           manager Adam D. Barratt
           manager Neil McGovern
           SRM Philipp Kern
           assistant Dann Frazier
           assistant Felipe Augusto van de Wiel
           assistant Julien Cristau
           assistant Mehdi Dogguy
           assistant Niels Thykier
           wizard Andreas Barth
           wizard Luk Claes
           wizard Marc Brockschmidt
           wizard Steve Langasek

Can anyone tell me what's the duty of wizards?

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