Often used to describe people or objects that blend into the workplace due to long-term presence.

Work Environment

The phrase doesn't imply someone is unimportant, just that they're a permanent, familiar presence.

Not Invisible

It is neutral, neither good nor bad, reflecting an established presence without implying merit or lack thereof.

It applies to any familiar setting, not just the workplace. It can be a club, a neighborhood, or a group.

The phrase can express affection for someone whose constancy brings comfort to a place.