Conversation so far:
Where was Theodore Roosevelt born?
Theodore Roosevelt Jr. was born on October 27, 1858, at 28 East 20th Street in Manhattan, New York City.
Who was Theodore Roosevelt Jr.'s mother?
Theodore Roosevelt was the second of four children born to socialite Martha Stewart Mittie Bulloch and businessman and philanthropist Theodore Roosevelt Sr.

Question: What type of work did his father do?
Self-contained rewrite: What type of work did Theodore Roosevelt Jr.'s father do?