Uber's president has resigned after just six months in the role as the company is facing numerous controversies, adding to mounting fears over the future of the firm.

Jeff Jones, former marketing head at Target, was tasked with altering Uber's public image, but decided to leave swiftly after joining citing an irreconcilable culture clash as the reason.

The departure comes as a raft of controversies are plaguing the company, including allegations of sexism and sexual harassment going unpunished in its offices.

Uber is also fighting a high-profile lawsuit against Google and was recently forced to remove authority-evading technology from its app in cities where it is banned.

Jones' resignation follows a string of high profile departures in recent weeks, including two vice presidents, a high profile security researcher and an engineering executive.

"I joined Uber because of its mission, and the challenge to build global capabilities that would help the company mature and thrive in the long term," Jones told Reuters.

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