Formal but everyone's friendly and we have casual Fridays.
Generally high vis in operations or any site you will visit. Offices are strictly casual business attire.
Good office space in the head office. good kitchen. some site offices have a lot to improve on.
Business wear in the office. PPE on site.
The corporate office spaces are great and most plants are also very well equipped. There are some rural plants that don't have 'office' spaces as they are not intended to be functioning office spaces. The dress code depends where you are. If you're at a plant it's PPE whilst at head offices it's relaxed business attire and casual Fridays.