You can be on as many different teams as you like. You can email us at firstname.lastname@example.org to create multiple accounts on Evrmnt Creator (and be owner of each). You can also be invited to multiple other teams to be a member.
But remember, you can only be working on one team at a time. Your current team will be named on the top bar on every Envrmnt Creator screen.
At log in, you be asked to choose which team you want to work on at the time. Once logged in, you will be able to switch from one team to another by using the drop down by the team name on the top bar.