Apple - Switching Organizations in Apple Developer Center
I have an Apple ID for my multiple work accounts. When I sign in, I see:
I'm not sure why you aren't seeing it, if you have two teams on the same Apple ID.
As the solution suggested by Alan does no longer work for me, I investigated a bit and found out the team switching option is now located under Certificates, Identifiers & Profiles, but still has no clickable link to it.
The URL is now:
https://developer.apple.com/account/selectTeam.action
Update
It appears, the following URL is also working:
https://developer.apple.com/membercenter/selectTeam.action