Barclays Wealth in New York City has hired Anthony Valvo as a director and head of credit structuring, Americas. He was a senior credit officer at Citigroup in New York City.

The Boston Company Asset Management, a unit of Bank of New York Mellon Corp., hired Ra’ad Siraj as managing director of investment systems and data, a newly created position. He was head of operations for Sermo, of Cambridge, Mass.

Brown Brothers Harriman of New York City announced it appointed Andrew J. F. Tucker, who is a senior partner for the company, as head of its Asia Pacific business. He will move to Hong Kong, but continuing running its markets business.

Citi Private Bank, a unit of Citigroup, hired Tracey Warson as a managing director and west coast regional executive. Previously, she was a western division executive for U.S. Trust, Bank of America Private Wealth Management.

Great-West Retirement Services hired Ryan Derbes to be a regional sales director for parts of Florida and southern Alabama. He was a regional vice president of north and central Florida and southern Louisiana at ING.

Jackson National Life Insurance Co., a Lansing, Mich., unit of London's Prudential plc, promoted Muhammad Shami to the newly created position of vice president of investment systems. He was an assistant vice president at Curian Systems, a Denver-based unit of Jackson National.

Prestige Wealth Management of Flemington, N.J., hired Kathleen Boyle as director of client relations and communications. She was a marketing manager and senior business analyst at Dow Jones & Co., in New York City.

The Securities and Exchange Commission announced that Fredric Firestone, an associate in its division of enforcement who oversaw its investigation into the collapse of the auction rate securities market, will leave next month to become a partner at McDermott, Will & Emery. At the Washington law firm, Firestone will run its SEC defense practice. Before joining the SEC, Firestone was a judge advocate in the Navy.

Joe DiPaola was named president of World Financial Group, of Duluth, Ga. It also said that its current president, Jack D. Linder, was promoted to chief executive officer. DiPaola was chief agency officer for Transamerica Insurance & Investment Group of Cedar Rapids, Iowa.