Contractor pro-tip.

Don't be an a-hole to the team you are supposed to be supporting. If you are brought in to help lend domain expertise, remember a large part of your value is to offload stress from the team.

Being an entitled "alpha" bro may work with the execs but the people who actually do work will see right through you. Chances are you were brought in despite protests or skepticism of the team to begin with, so you have to earn trust and respect.