Conversation so far:
When was Henry Kissinger born?
05/27/1923
Was Henry Kissinger a Jewish refugee?
A Jewish refugee who fled Nazi Germany with his family in 1938
What was Henry Kissinger's position in the Nixon administration?
After Richard Nixon became president in 1968, Kissinger was appointed as National Security Advisor.

Question: What did Henry Kissinger do prior to becoming National Security Advisor?
Self-contained rewrite: What did Henry Kissinger do prior to becoming National Security Advisor?