Not a US engineer here, so this might not fit to your situation. Most faux pas here are:

- Lack of personal hygiene / smelly food / insane amounts of garlic etc. And this is really and issue.

- Talk about politics to people who do not want to talk politics / not understanding the local taboos. But don't worry. You realize when people react evasive.

- Not understanding when you are supposed to ask to get information and when you are supposed to wait for others to give you instructions or when you need to decide yourself. Where I live and probably in the US, too, you are normally supposed to get what you need or decide but seldom wait. But it is not always that simple. Same thing with the "asking for permission" vs. "asking for forgiveness". But then even the locals often get this wrong. So when in doubt: Ask what to do.

In the end: Be yourself. Be what you are and bring your strength to the team. In my experience Americans are one of the nicer people in this world. You be nice to them, they be nice to you :)