You will need a scripted post-function to do that. My issue here is how do you determine the assignee's manager? If that won't be a problem, try different scripted post-functions for automatically setting Watchers based on a condition. There's a lot of them in the marketplace (Try the JIRA ScriptRunner).
To determine the manager of a user, we normally recommend the following strategy:
Obviously a custom add-on is always a solution. This would include a manager admin UI and a post-function to add manager as watcher.
I have multiple projects that use variations of the same base workflow. The variations depend on the requirements of the project or issue type. The variations mostly come in the form of new statuses ...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs