Uber has a new chief financial officer, the company announced Tuesday.

Nelson Chai, the former CFO of Merrill Lynch, will take on the role, which has been open since 2015.

Chai is a key hire in Uber CEO Dara Khosrowshahi's plan to take the company public in 2019.

After three years of searching, Uber has filled a key executive role necessary to move forward with its plans to hold an initial public offering in 2019.

Nelson Chai has joined Uber as its CFO, the company announced Tuesday.

Previously, Chai served as CFO of Merrill Lynch, and was most recently CEO of the Warranty Group, an insurance and warranty provider based in Chicago.

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