In the novel Cold Days Harry Dresden encounters
when he visits
The Outer Gates
During Harry's conversation with this character, Harry requests assistance to deal with
The Enemy, who has been driving so much of the plot of the whole series.
The other character is unable to assist Harry with anything other than knowledge (though that turns out to be useful). When Harry presses him,
tells Harry he will also notify the Council of Harry's survival, of his continuing resistance towards Mab's power's corrupting influence, and will handle the necessary paperwork.
In short, yes, I expect Harry is still a member of the Council. I similarly expect that, while serving under Mab's orders, Harry will not be permitted to continue as a Warden. He certainly hasn't (as of Skin Game) been wearing the cloak or discharging any of his duties.
Perhaps this will be clarified in the next book, Peace Talks.