My mum, age 22, joined up in 1942 and at the end of the war, was supervising a room full of crypto techs as a WAVES Lieutenant (jg). She was part of OP-20-G, the US codebreaking operation on Nebraska Av in DC. She went on, briefly, to work at CIA.
Her working life ended when she had me in 1954.
We, her children, knew some of this. When my son joined the Army and got his security clearance, I had a bit of fun. One of the questions they asked him was if any of his family had ever had a security clearance. He asked us, and I supplied my mum and dad's names, DOB and SSN. Dad was career CIA.
My son said the interviewer did mention that he did not very often see a married couple with high level, broad access clearances. Greatest generation, indeed. Although, you never know what you are capable of until it is asked of you.