Rockwell International Corp. Monday announced the appointment...

Rockwell International Corp. Monday announced the appointment of M. L. (Mike) Skolnick as executive vice president of its Canoga Park-based Rocketdyne Division.

Skolnick will be responsible for leading the division’s business growth initiatives, building on the division’s strength in propulsion, power and directed energy.

Skolnick joined Rockwell in 1976, and for the past seven years has been vice president of advanced programs at Rockwell’s System Development Center in Seal Beach.

* First Interstate Bancorp announced the appointment of June Jones as senior vice president in its Human Resources Department.

Jones also will continue as the head of corporate-wide Employee Relations and Employment for the Los Angeles-based holding company, which has 16 banks and other subsidiaries in 13 western states.

* Foothill Group Inc. has named Henry K. Jordan senior vice president, chief financial officer and corporate secretary. Jordan held the post of vice president and controller from November, 1984, through February, 1990. Since then he has served as vice president, chief financial officer and corporate secretary.

The Los Angeles-based company is a financial services company engaged in the asset-based lending and asset management businesses.

* Nike Inc. named Thomas E. Clarke as its new president, succeeding Richard K. Donahue, who will become vice chairman.

Clarke joined Nike in 1980 as a researcher. He was named a vice president and director of marketing in 1988, and general manager of the Nike brand in 1991. Donahue had been president of the sneaker, footwear and sports apparel company for four years.

Nike, based in Beaverton, Ore., also announced the creation of a fourth international division covering Eastern Europe, India and Africa.

* Hill & Knowlton Inc. announced the appointment of its Asia Pacific executive vice president, Thomas G. Mattia, to head the firm’s third-largest U.S. operation with headquarters in Los Angeles.

Mattia becomes general manager of Hill & Knowlton’s Los Angeles operations and will be directly responsible for the firm’s offices in Los Angeles, Irvine and Detroit. He also was named executive vice president of Hill & Knowlton USA with responsibility for its advanced technology practice and joins the firm’s North American Operations Committee.

Prior to this appointment, Mattia served as managing director of Hill & Knowlton Asia Ltd..

* Jan Fisher and Paul Nichols have been named senior vice presidents of The Lippon Group, a Los Angeles-based international public relations and consulting organization.

Fisher, who will have responsibility for television, home video and corporate accounts, was vice president of the company.

Nichols, previously an account supervisor, will continue to work with corporate and entertainment accounts.

* William R. Lewis has joined Jenny Craig Inc. as chief financial officer and treasurer, succeeding W. James Mallen, who will retire.

Lewis was most recently executive vice president and chief financial officer of Nutri/System. Before joining Nutri/System in 1991, Lewis was executive vice president and chief financial officer for Simplicity Holdings Inc.

The Del Mar, Calif.-based firm is a leading weight management company.