You can add another person from your team to your Hopin event to help manage and organize things by going to your Organiser profile.
- Select 'Home' under the 'Organiser' panel on the bottom left
- Select 'Team' at the bottom left panel
- Key in the email address of your team member and select 'Send Invite'
Once they have accepted the invite, they will be added as a team member to all your organisation's events.