You can open a client profile from your current account and switch between them. To open a client profile go to Settings > Contact Info > Create a New Account. Thank you.
I`m sorry about the confusion. The steps I`ve shared are for the reversed process, opening a freelancer profile from a client account.
Please follow these steps to open a client profile and hire freelancers: Settings > My Teams > Create a New Account > New Client Account. Thank you.