Before they were commanders in chief, they were haberdashers, teachers, geologists and police officers, among other occupations.

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The Constitution lists three qualifications for the job of president of the United States: One must be a natural-born citizen who is at least 35 years old and has lived in the U.S. for a minimum of 14 years. Unlike many jobs, a college degree isn’t even required — Harry S. Truman never earned one, for example.

Truman had vast professional experiences before becoming president, of course, including some offbeat jobs. He was a drugstore clerk at 14, then a railway timekeeper who lived in hobo camps along the Sante Fe line, served in the military in World War I, opened a haberdashery business and became an elected judge.

Truman’s successor, Dwight D. Eisenhower, was a night supervisor at the Belle Springs Creamery in Kansas before accepting an appointment to West Point. Lyndon B. Johnson was a teacher. Richard Nixon worked at his father’s grocery store. Gerald Ford was a boxing coach at Yale, and Jimmy Carter had a peanut farm.

Here are some other occupations presidents had before holding the highest office, according to CareerCast:

• Ronald Reagan: actor
• Barack Obama: community organizer
• George W. Bush: corporate executive
• Herbert Hoover: geologist
• William Howard Taft: judge
• Theodore Roosevelt: police officer
• Woodrow Wilson: university professor