Desired behavior would be to have the issue assigned to Ops_guy_1 as he was the first responder.
Is this possible?
You could use the Script Runner to create a script that updates the assignee. I do not know what your workflow looks like, but if the responses trigger a workflow transition you could use the script in the post condition of the transition. If there is no workflow transition, you could use the Auto Transition Listener to listen to comment events and then call a workflow step that you specifically create for this (and does not change the status of the issue).
I must say this does seem a bit complicated, so I am hoping there are better solutions. Or maybe you can elaborate on your workflow and why the issue needs to be assigned to the first user who comments, that may open up other solutions.
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