You mean a phrase? Depending on details it could be considered one of the following: Lateral move (lateral usually implies same rank/pay) Lateral transfer Intracompany move/transfer Interdepartmental move/transfer Transfer to sister company

"Job-hopping" = changing from job-to-job over a short period of time "Jumping ship" means suddenly leaving one company to go to another, particularly because of some difficulty with the first job. Implies abandonment. You could also say someone "took a job at" the new company or was "lured from (company A) to join (company B)" In today's news, you may have heard about a Google executive who was "poached" by Chinese phonemaker Xiaomi. This article also describes him as "jumping" from one company to another: money.cnn.com/2013/08/29/technology/xiaomi-barra/index.html Depending on the context, I might go with simply "moving to a new job/company" or being "hired by a competitor."

counterpart job-hopping？

I don't think so. There is a very informal idiom: 'jumping ship' - which is close to what you want.