I have a new coworker who doesn't wear socks, and takes off his shoes in the office. This team is part of a major organization, on a client site, in a client building.
Our HR department is located off site. Contacting HR feels like an escalation, which I was hoping to avoid. How do I go about talking to this coworker about this situation? If that is the wrong approach how do I approach my manager about this individual?