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Ruth Porat.
Before she joined Google in May 2015, Porat was the CFO of Morgan Stanley. She is known for leading some of the technology sector's biggest funding and IPO rounds, including work for eBay, Priceline, and Amazon.
She has said in no uncertain terms that she doesn't believe in "work-life balance," and her actions on many occasions have proven that point.
From working through childbirth and breast cancer to spending her free time flipping houses, she never sits still.
Scroll down to read seven examples of Porat's incredible drive.