Uber’s chief financial officer Brent Callinicos is leaving the company, CEO Travis Kalanick said in an email to investors, but will stay on as an advisor, according to a Reuters report.

A replacement for Callinicos has not yet been decided and Gautam Gupta, in charge of business operations and finance, will fill in for the time being.

“Brent has done a wonderful job here at Uber but has decided that it is time for his next journey, one where his wife and daughter take the front seat,” Kalanick wrote in the email.

Callinicos was CFO in the platforms and services division at Microsoft before taking up the role as treasurer and chief accountant at Google from 2007 until 2013, when he joined Uber.

Taxi-hailing app Uber expanded the amount of capital it hopes to raise in its current funding round from $1 billion to $2.8 billion due to a high demand for its shares and “the confidence investors have in Uber’s growth.”

But the app has also had some bad publicity. It was banned in New Delhi in December, following rape allegations against one of its drivers.

The company has also seen rape allegations against drivers in Chicago and Boston and is trying to overturn bans in France, Spain and South Korea for alleged violations such as using unlicensed drivers.