Safra Catz, CEO of Oracle

Safra Catz, an Israeli-born American business executive, is the CEO of Oracle — a position she has served with the software firm since September 2014 when founder, Larry Ellison, stepped down from the role. She joined the company in 1999, however, and she is credited with spearheading the company's acquisition strategy. Catz reportedly helped the Oracle close more than 130 acquisitions, according to Forbes.

Her best advice: "Hopefully in the future, generational challenges will be measured by achievement, not gender," she said, according to Citatis.