They can. Typically they are 2-5 years, but you have to read the specific NDA to be sure. I will never sign a NDA that doesn't expire in <10 yrs after cessatio

They can. Typically they are 2-5 years, but you have to read the specific NDA to be sure. I will never sign a NDA that doesn't expire in <10 yrs after cessation of work, as its just too risky to indefinitely hold any information secret to the level required in most NDAs. Management changes, and what the current management is fine with, future management could not, or you do some work that the company doesn't like 10 years down the road and they dig through the filing cabinet looking for something to hit you with.