“Corporate ladder” is a term used to describe the hierarchy of a company’s organizational structure.
When someone says they are working hard to “climb the corporate ladder” they are simply saying they are looking to advance within a company through promotions.
Examples:
1) You have to work very hard if you want to climb the corporate ladder.
2) If women want to climb the corporate ladder, they may have to sacrifice some of their family life.
Image Credit
Dimitra's English 
The explanation of the idioms and the examples/illustrations you provide with them are lucid!! Well done!
LikeLiked by 1 person
Thanks so much for your comment Cosmohelen! I am happy you like them and I hope you find them useful!
Best wishes,
Dimitra
LikeLike