veteran ***
old-timer
oldtimer
old hand
warhorse
old stager
stager

With 11 years of industry experience, he is an old hand.

They said that he was an old hand in space now.

Two or three of the old hands would stand by her, she knew that.

I don't like it on my old hands any more.

That had to be one of the real old hands.

The older hands kept out of the way for the most part.

The girl took one of the old hands and held it in her own.

You'd think the old hands would get used to it.

He was an old hand who came into the agency in 1961.

Tom and I are getting to be old hands at it.