your opposite number
US /jʊər ˈɑpəzɪt ˈnʌmbər/
UK /jʊər ˈɑpəzɪt ˈnʌmbər/

1.
对应人员, 同等职位的人
a person who has the same position or does the same job as you but in a different department, organization, or country
:
•
I'll need to discuss this with my opposite number in the French office.
我需要和法国办事处的我的对应人员讨论此事。
•
The CEO met with his opposite number from the rival company.
首席执行官会见了竞争公司的他的对应人员。