Larry Ellison is stepping down as CEO of Oracle, which he founded 37 years ago, and will become executive chairman of the board and chief technology officer. Safra Catz, president and CFO, will become co-CEO along with president Mark Hurd.

Dede Wakefield

GT Nexus, which says it’s the world’s largest cloud-based network for global trade and supply-chain management, hired Dede Wakefield to run finance. She arrives from Global Payments, where she was senior vice president of finance.

Robert Riesbeck has been chosen to lead the finance function at hhgregg. He joins the retailer from Sun Capital Partners, where he was operations executive/group CFO.

KCG Holdings has named chief accounting officer Sean Galvin interim CFO. He succeeds Steve Bisgay, who will become an adviser to the securities firm until the end of the year. The search for a permanent finance chief is under way.

Greg Dowell has been appointed CFO and treasurer at real estate investment trust SummitHotel Properties, effective Oct. 1. He replaces interim CFO Paul Ruiz, who will remain chief accounting officer. Previously, Dowell was chief operating officer at American Campus Communities.

David Keffer has been promoted to finance chief at SRA International. He has been at the firm since 2003 and most recently was corporate controller.

Electromechanical-device provider Sparton has selected Don Pearson to head finance. He joins the company from AMCOL International, where he also was CFO.

Jon Biro has been named to the top finance spot at Exterran Holdings. Formerly, he led the finance function at Consolidated Graphics.

Hanger, which provides orthotic and prosthetic devices, has said that Thomas Kiraly will become executive vice president on Oct. 1, and will become finance chief sometime in the fourth quarter. As head of finance, he will replace George McHenry, who is retiring at the end of the year. Most recently, Kiraly was CFO and treasurer of Sheridan Healthcare.

Bela Pandya has been named interim CFO of artificial intelligence advertiser RocketFuel, effective Oct. 1. Pandya, vice president of finance, takes over from J. Peter Bardwick, who has resigned, effective at the end of the firm’s third fiscal quarter. A search is under way for his permanent successor.

U.S. Auto Parts Network announced that David Robson, who led the finance function, has resigned. Michael Yoshida, who has been controller since 2009, will become principal accounting officer and interim CFO.