The longtime CEO of Las Vegas-based online shoe retailer Zappos.com is retiring from the company. Company spokeswoman Laura Davis confirmed to the Las Vegas Review-Journal Monday that Tony Hsieh stepped down after 20 years at the helm. Chief Operating Officer Kedar Deshpande took over as CEO. The 46-year-old Hsieh is a Harvard University graduate who joined the online shoe company then called ShoeSite.com in 1999. The company was sold to Amazon for $1.2 billion in 2009, but Hsieh remained with the company. He invested $350 million in 2012 to revitalizing downtown Las Vegas, where Zappos is now headquartered.