Thank you Carl.
Pilecki also mentions one or two Poles as being functionaries at Auschwitz I :-
"The first one’s real name was Bronisław Brodniewicz
[also written Brodniewitsch], the other’s—Leon Wieczorek
[also written Wietschorek]; both ex-Poles working for the
Germans. . ."
"Silesians—people whom I had once taken to be Poles, butand...
who for the most part had recently turned their back on their
Polish heritage—now began scrambling up to be block chiefs.
Having formerly had a very good opinion of them, I now
could not believe my own eyes. They killed off Poles, no longer
seeing them as some of their own, while taking themselves to
be some kind of German tribe.
I once asked a vorarbeiter [foreman] from Silesia:
“Why are you beating him, he’s a Pole?”
“But I’m no Pole; I’m from Silesia. My parents wanted
to make a Pole out of me, but a Silesian—that’s a German.
Poles live in Warsaw and not in Silesia.”
"And he went on beating the other fellow with his club.
There were two block chiefs, Silesians—Skrzypek [Alfred
Skrzypek] and Bednarek [Emil Bednarek]—who were perhaps
worse than the worst German.
They clubbed to death such a large number of inmates that
even Bloody Aloiz, who in any event had slackened off a bit,
could not keep up with these thugs."