One of Morgan Stanley's top executives is leaving the firm to become CFO at Google.

After a 28-year career at Morgan Stanley, its chief financial officer, Ruth Porat, is leaving the firm to take on a new role at Google in Silicon Valley.

Porat will become CFO at Google on May 26, reporting to its chief executive and co-founder, Larry Page.

During her time at Morgan Stanley, Porat led the tech banking franchise during the internet boom; led the financial institutions group banking team during the financial crisis; and then became CFO.  

She will continue working at the US-listed firm until the end of April and will be succeeded by Jonathan Pruzan, currently co-head of the global financial institutions group in investment banking.

Pruzan joined in 1994 and has served on the Morgan Stanley/MUFG steering committee since 2013. As well as continuing with that, he will also join the firm’s operating and management committees.