David Wah, who is advising private equity firm Silver Lake Partners on the proposed $25 billion deal to take Dell Inc private, will remain co-head of the group alongside New York-based Mark Simonian, one of the sources said.

Credit Suisse has been building its Silicon Valley platform over the past two years, moving other bankers, including Anthony Armstrong, co-head of Americas M&A, to its San Francisco office and poaching bankers from rivals.

The Swiss bank ranks No. 1 in global technology initial public offerings for the year to date and has helped lead deals, including Tableau Software Inc and Silver Spring Networks Inc. It ranks sixth for worldwide technology M&A, according to Thomson Reuters data.

Besides Silver Lake, Wah has worked on such high-profile deals as advising Alibaba Group on its $7.6 billion repurchase of a 20 percent stake in the Chinese internet company from Yahoo Inc.

(Reporting By Nadia Damouni; Editing by Paritosh Bansal and John Wallace)

By Nadia Damouni