Few additional notes about voting for witnesses or setting up a voting proxy:

Voting for witnesses is very important on the Steem platform. Witnesses provide security and reliability of the platform.
Chose them wisely.

You can either chose to vote yourself for up to 30 witnesses or - as in this case - chose someone (not necessarily a witness!) to be your proxy for such voting.
That means whoever he or she approves as a witness will also be your witness.
Voting for witnesses or setting up witness voting proxy might be done here (it needs active key):
https://steemit.com/~witnesses

(Sorry for hijacking your post, I'm wandering around here and trying to fix some misconceptions around witness voting / setting up a proxy, because as far as I can see a lot of people are doing it wrong despite their good intent... So I will be replaying here and there to comments, as a witness case is very important.).