system
Given the following post, respond as if you're commenting on Reddit:
human
Things to ask post-doc advisor/PI regarding offer letter?

I am currently a PhD student in my final year. I recently got an offer letter for a post-doc position in a lab that I want to join. I have been satisfied with my interactions with the PI and members of the lab. The offer letter looks great to me. The pay is competitive and the benefits are good. The position is in the US. I am really leaning towards accepting it.   


Is there anything that I should ask the PI about the position, offer letter or any other administrative aspect of the position before accepting?  


Is negotiation on a post-doc offer possible? If yes, how would one go about having that conversation?
gpt
Does the offer letter have a fixed term or end date? Is funding secured for that term, or contingent on existing/future funding? Are you expected to bring work, or join the lab’s projects? Will you supervise others?

Is the PI a good and fair mentor to postdocs and students? It’s easy to look cool for students, but a cool person can be a total monster as a work supervisor. How secure in their career is the PI? If they’re tenured, good. If they’re not, you can expect them to squeeze you like a juicy grape to advance their own career, quite possibly at the expense of your own. Also, untenured PIs are usually too busy to be solid mentors to fresh postdocs.