Depends on the company - I had a tech lead who once tried to mandate that all engineers on the team be in by 9:30 here in the Valley at a startup. I laughed whe

Depends on the company - I had a tech lead who once tried to mandate that all engineers on the team be in by 9:30 here in the Valley at a startup. I laughed when he told me that and said "Good luck getting that to happen" to him. He quickly learned that nobody was going to listen to him on that. It's not even that I was against going in early - I'm typically in around 7-8 am. I just knew other engineers typically wouldn't.