As a Non-Admin user, how can I know who are the Admin users within my company ?

The Admin users are the only ones to have access to the Users list.

Furthermore, as a Non-Admin user, it is crucial to make sure to do the follow-up by contacting the appropriate Admin user of your company if you face a greyed-out acceptance case while signing a contract:

As you can see, the red message below mentions that only Admin users can review and sign the contract. If you click on the information sign (🛈), a new page will open with all existing Admin users within your company:

You also have the possibility to click on the green button to send directly an email to the Admin selected.