Credit Suisse

(CS) - Get Report

has hired a senior London-based investment banker from

Citigroup

(C) - Get Report

who has worked on several high-profile transactions involving financial companies.

Chris Williams, a 22-year investment banking veteran, recently worked as an adviser to the U.K. Treasury, the Bank of England and the Bank of Ireland, according to an internal Credit Suisse memo announcing the hire. He also advised

Northern Rock

on its options prior to its nationalization and

Barclays

(BCS) - Get Report

on its bid for

ABN Amro

.

The turmoil among financial companies has created lots of opportunities for the institutions that advise them, creating strong demand for bankers like Williams with expertise in that area. Last year

Goldman Sachs

(GS) - Get Report

earned big fees advising financial companies that needed to raise money.

Morgan Stanley

(MS) - Get Report

has proven adept at winning such business lately, as

The New York Times

' business blog DealBook pointed out Tuesday. The firm has worked with eight out of 10 U.S. banks that have raised equity following the government's recent stress tests.

A Credit Suisse spokesman confirmed the contents of the memo. A Citigroup spokesman declined to comment.