Stephen Hemsley has taken over from Dr. William McGuire as chief executive officer of UnitedHealth Group Inc.

Hemsley has been the company’s president since 1999.

McGuire announced a decision to give up the CEO title after an independent review team said it had found evidence of weak controls at UnitedHealth’s executive compensation programs.

In other news, UnitedHealth has named William Munsell executive vice president for internal affairs and Anthony Welters executive vice president for external affairs.

Munsell has been CEO of the specialized care services unit, and Welters has been president of the AmeriChoice unit.

Richard Anderson, a UnitedHealth executive vice president, will become president of a new commercial services group, which will include specialized care services, Ingenix and Exante Financial Services, according to UnitedHealth.

Lois Quam, chief executive officer of the Ovations unit, will become president of a new public and senior markets group, which will include Ovations and AmeriChoice.

David Wichmann, president of the UnitedHealthcare managed care unit, will become president of a new individual and employer markets group, consisting primarily of UnitedHealthcare and Uniprise.

UnitedHealth also is recruiting a chief administrative officer, a chief legal officer, a chief ethics officer and new board members, the company says.

In other personnel news:

- Standard Insurance Company, a unit of StanCorp Financial Group Inc., Portland, Ore., has promoted David O’Brien to senior vice president of information technology and William Pfeiffer to senior vice president of human resources.

O’Brien has been vice president of technology.

Pfeiffer has been a vice president in human resources.

Another StanCorp unit, StanCorp Equities Inc., has hired Sheri Fitts to be director of retirement plans communications and large plan sales.

Fitts previously was vice president of business development in the institutional trust and custody division at U.S. Bancorp Inc., Portland, Ore.

Fitts is president of Portland Female Executives, Portland.

- Prudential Annuities, a unit of Prudential Financial Inc., Newark, N.J., has hired Joseph Fuschillo to be executive vice president of distribution and Harry Johnson to be national sales manager for the wirehouse regional channel.

Fuschillo previously was managing director and head of distribution for products and services at UBS Financial Services Inc., New York

Johnson was senior vice president and Western division sales manager for John Hancock Wood Logan, a unit of Manulife Financial Corp., Toronto.

- Millennium Brokerage Group L.L.C., Nashville, Tenn., has hired Carol Rando to be executive vice president.

Rando previously was senior vice president for distribution at Jefferson Pilot Financial, Greensboro, N.C.

Rando has a bachelor’s degree in computer information systems from Bentley College and a master’s degree in business with a concentration in operations management from the University of Connecticut.