[fgdorais]

Anil Nerode is almost surely the oldest working computer scientist today - https://math.cornell.edu/anil-nerode - He technically is in the math department at Cornell but he has been there since well before Cornell had a computer science department.

[weewee2018]

I just read his CV. He got his PhD under Gödel. He was at Princeton when Einstein was still there. Amazing!