Always be doing something. First do your job, then look for work. Nothing will more quickly endear you to your team than staying busy and finding ways to contribute beyond the primary responsibilities of your position. Yes, there are SOP’s and checklists; yes, everyone has a job to do.
That said, there are constantly more things to do than there is time to do them. Look for work! Standing by while the client is in a meeting? Pull security. Is the driver prepping the vehicle? Grab a towel. You should be constantly asking yourself “how am I contributing to the team’s success right now”, then look for work.