I'm a contractor. Not an app store/Mac expert. A few years ago I connected my Apple account to a team I was working with. They set me up as the Account Holder for their team. I forgot all about that, and today I want to set up a new team for another contract, so I reactivated my Developer account. I find I'm still the Account Holder for that old project, and I don't see how to create a new Team and switch to it. (I did send a request for someone to take over the old team, but who knows when they'll get to that, if ever.) All I need is to create a couple of signing certs, but not for the old team.