If you are already assigned as a group admin on Viber groups, you can add a new admin for Viber groups by doing as follows, so they can manage the group too:
1. Make sure you have updated the Viber to the latest version and then open the app on your Android device
2. Open the Viber group you are already assigned as the admin
3. Swipe left from the right edge to open the sidebar menu
4. Under the Participants, find the contact/person you want to set as Admin.
5. Tap the person's name/number and touch the Add as Admin option on the opened menu
6. There we have the new admin
**To remove an admin on Viber groups, simply tap the name/number and touch the Remove as Admin option