You are able to give group access to a user which will allow the user to see all tickets submitted by their group.
Before you do this, you must make sure users are associated with the appropriate group in Admin> Groups. Then you will take these steps:
1.Go to Admin> Helpdesk Configuration
2.Under the Miscellaneous Settings" section find the question "Enable Group Access Option"
3.Choose "ON" (this enables the option to appear in the user's profile)
4.Go to Admin > Users
5.Open the user's profile that needs access to see all submitted tickets
6.Find the question "Group Access?", choose an option for full access or the ability to only view and add comments (unable to close tickets)