Energy and Natural Resources Committee

Thomas L. Fisher, president of NICOR Inc., will become CEO at the company's annual meeting on May 3. He also is expected to become chairman in December, succeeding Richard G. Cline. Fisher, 50, joined NICOR's principal subsidiary, Northern Illinois Gas Co., in 1967, became president and CEO in 1988, and has served in a number of executive positions.

PECO Energy Co. president Corbin A. McNeill, Jr. will assume the additional position of CEO at the company's April 12 annual meeting. Joseph F.

Larry Hobart, executive director of the American Public Power Association, plans to retire on July 1, ending a 35-year career with public power. Hobart became executive director in 1986, and previously served in several management positions. Hobart also serves as v.p. and board member of the Consumer Federation of America.

Pacific Enterprises, parent of Southern California Gas Co., has restructured the company, to include a new Office of the Chairman. The new office will be headed jointly by Willis B.