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
Farlex Dictionary of Idioms.

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
Farlex Partner Idioms Dictionary
See also:
  • be replaced by (someone or something)
  • be replaced with (someone or something)
  • be remembered as (something)
  • be remembered as/for something
  • at (one's) doorstep
  • at doorstep
  • at expense
  • at somebody's expense
  • at someone's expense
  • at (one's) expense
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?"
Actions and Reactions
An 80-yard punt down wind making your opposite number look a right eejit!
Stewart Weir Column: JIM GOAL WAS A GLASS ACT
Merge all the miskicks, nutmegs and dropped crosses into one and it doesn't come close to the agony of losing a goal to your opposite number.
A goalie goal No.1 nightmare; Loony Joons
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.
Rookie Murphy backed to handle Parisse tussle; ITALY v IRELAND STADIO OLIMPICO 2.30pm