Ssh.
But honestly, I could see this in pretty much any office setting, including mine. My boss will go whole days stuck in meetings, so I’ll only see them if I get in really early or stay late. If I’m missing all day, people would assume I’m also in meetings or something, because we work with remote teams and half of my team is remote.
I’m a software engineer, but this could work for almost any office job, especially those in cubicles.