I've recently been appointed as manager of a team and am having problems with the behaviour of one of the team members who applied for the job himself.
He's very bright and skilled at what he does and has a lot of strengths - which I've praised him publicly and privately for.
But - and I've also told him this privately - he also sometimes demonstrates challenging behaviour which has stood in the way of his promotion (not just in this job, but elsewhere).
For example, he volunteered for a high-profile project and I supported him in this, in the face of competition from others and some cynicism from my own boss who felt that Mr X's reputation might hinder it.
Now he is objecting, in the office and in front of others, to carrying out some aspects of the project, which he knew about in advance and in writing at the time of agreeing he would carry out the project.
I spoke to Mr X today (privately) and said I found his behaviour puzzling and difficult as he had volunteered for the work.
He then gave me a list of objections, mostly not relating to this project, but to do with gripes he had with the way he felt he had been treated before my arrival in the department.
I can't help feeling that it's passive-aggressive behaviour and quite likely related to my being brought in to the job rather than him. (He was missing a very vital qualification for the post which I have and lacks the management experience I have, plus, I know that his reputation would have prevented him even if he had been qualified).
I was quite robust in my responses to his gripes..told him he should have raised them earlier...and I will look at addressing one specific issue he raised which I might be able to do something about. The previous complaints are in the past and not in my control anyway.
Any thoughts on how else to handle this? I suspect it's not going to go away, and I need to ensure successful delivery of the project. TIA