your opposite number

(one's) opposite number

Someone who has the same or very similar position, role, or function in a different group, company, or country; one's counterpart elsewhere. I've been going over the merger details with my opposite number in the XYZ Media. The Environmental Protection Agency and their opposite numbers around the globe have been negotiating new legislation aimed at curbing the effects of climate change.
See also: number, opposite

your ˌopposite ˈnumber

a person who holds the same position as you in another country, organization, company, etc: The American Secretary of State will meet his Russian opposite number tomorrow.She’s my opposite number in IBM.
See also: number, opposite
References in classic literature ?
So I said: "Why on earth didn't you see your Opposite Number in Town instead of bringing your office work here?
There's no doubt Parisse's a superstar, a fantastic player, but I don't think you come directly up against your opposite number all that much.
An 80-yard punt down wind making your opposite number look a right eejit