Know What These Successful People Did in Their 20's

2. Marissa Mayer, 40
President and CEO, Yahoo

Marissa joined Google in 1999 as an employee number 20 and was the company's first female engineer. She started writing code and supervising small teams of engineers, developing and conniving Google’s search contributions.

She became well-known for her attention to every detail which promoted her in to a product manager, and later became Director of Consumer Web products. She oversaw the outline of Google's renowned, plain search homepage.

3. Warren Buffet, 84
Chairman and CEO of Berkshire Hathaway

Buffett worked from 1951 to 1954 at Buffett-Falk & Co. as an investment salesman; from 1954 to 1956 at Graham-Newman Corp., as a securities analyst; and from 1956 to 1969 at Buffett Partnership, Ltd. as a general partner.

Also Read: 7 People Who Made Fortunes In The Most Unusual Ways