WILLIAM B. AIMETTI is President and Chief Operating Officer, and Board Member of The Depository Trust & Clearing Corporation (DTCC), a post he has held since August 2007.  He also serves as Chief Operating Officer of DTCC's National Securities Clearing Corporation (NSCC) and Depository Trust Company (DTC) subsidiaries. 

As COO, he is responsible for all day-to-day operations of DTCC and its subsidiaries, which involve, among other things, the clearing and settlement of more than $5.5 trillion in transactions daily.

Mr. Aimetti joined DTCC in July 2000 as a Managing Director and Chief Administrative Officer to oversee all operations and quality initiatives of the company's two subsidiaries, NSCC and DTC. He was named Managing Director and Chief Information Officer in April 2003.

Prior to joining DTCC, Mr. Aimetti was associated with Nomura Holdings America, Inc./Nomura Securities International, Inc. where he had been Executive Managing Director - Operations, Technology and Corporate Services reporting to the CEO of Nomura  He also served as President and Chief Executive Officer of Nomura International Trust Company, a subsidiary of Nomura Holdings America.  He joined Nomura in 1994. 

Previously, he was a Division Executive for Citibank, where he was responsible for all operations and technology for North American Global Finance. In this capacity, he managed over 3,000 employees in supporting all of the Capital Market product lines including FX, Derivatives, Securities Trading, Real Estate, Equipment financing and leasing, Debt Restructuring, & U.S. Commercial Lending.

Prior to joining Citibank in 1986, Mr. Aimetti was the Chief Operating Officer of Wall Street Clearing Corporation (1983 - 1986) and from 1974 through 1983 he was the Group Head for the Securities Services Group at the Chase Manhattan Bank.

In his career, Mr. Aimetti has chaired both the Securities Operations Division of the SIA and the Securities Committee of the NYCHA as well as being a Board Member of CEDEL (now Clearstream).