James B. Henderson has been elected chairman of the National Association of Manufacturers. Henderson is an executive vice president of Shell Oil Co. in Houston.

He succeeds Bernard J. O'Keefe, chairman of the board and chief executive officer of EG & G Inc., a Wellesley, Mass.-based high-technology, energy-related manufacturer.

Henderson joined Shell Chemical Co. in 1949 in Houston. He was elected to his present position in 1979. He has responsibility for the Shell Refining and Marketing Co. and the Shell Chemical Co. He is a director of the Shell Oil Co. and the National Gypsum Co.

Henderson was formerly vice chairman of NAM. He is a member of the American Institute of Chemical Engineers and the American Chemical Society. He was formerly chairman of the American Industrial Health Council. He is a former director of the Chemical Manufacturers Association, the American Petroleum Institute, the Soap and Detergent Association and the International Institute of Synthetic Rubber Producers.

NAM also announced last week the promotion of Mark Griffiths to assistant vice president for resources and technology. He will also continue as director of natural resources, a position he has held for one year.

The National Association of Manufacturers is based in Washington with regional offices throughout the country.

One of the country's major business organizations, NAM has 13,000 member firms, which account for 80 percent of the country's industrial output and 85 percent of the country's industrial jobs, the association said.

The Michigan-based International Facility Management Association has formed a Washington-area chapter. The nonprofit association describes facility management as a management process that considers people, processes and place in an organizational context. The group has about 1,000 members in this country and abroad. There are currently 30 members in the new Capital chapter.

Peter S. Kimmel of the General Services Administration has been named president of the chapter.

Paul W. Prior has been named chairman of the United States League of Savings Institutions. He had served as vice chairman of the league during the past year. Prior is chairman and president of Henry County Savings and Loan Association of New Castle, Ind.

John B. Zellars has been named to succeed Prior as vice chairman. Zellars is chairman and president of Georgia Federal Bank of Atlanta.

Thomas W. Flynn has been elected to the executive council of the Maryland Hospital Association. Flynn is chairman of the boards of Leland Memorial Hospital in Riverdale, Washington Adventist Hospital in Takoma Park and Shady Grove Adventist Hospital in Gaithersburg. He is also regional vice president for the Mid-Atlantic region of the Adventist Health System/Eastern.

James C. Sivon has been named senior vice president of the Association of Bank Holding Companies. Sivon had been chief counsel and director of the Republican staff of the House of Representatives Banking Committee since 1980.

Julie A. Dolan has been appointed director of information and publications of the American Advertising Federation. Dolan was formerly an associate of the Washington public relations firm of Porter, Novelli & Associates. Leslie A. Hilleman has been named assistant to the president and meeting coordinator.

Edward H. Able Jr. has been named executive vice president of the American Society of Landscape Architects. Able had been executive director of the society since 1977.

Meryl Schaffer has been elected treasurer of the District of Columbia chapter of the American Society of Women Accountants. Schaffer is office manager of Carlyn Computer Systems Inc. in Annandale.

Geoffrey G. Harding has been named 1983 EV Man of the Year by the Electric Vehicle Council. Harding is deputy general manager of Lucas Chloride EV Systems Ltd.

Dr. Jeffrey Kraskin has been named chairman of the Optometric Council of the National Capital Region. Kraskin, who practices in Washington, is also president of the Optometric Society of the District of Columbia. The OCNCR is an umbrella organization of the Optometric Society of the District of Columbia, the Central Maryland Optometric Society and the Northern Virginia Optometric Society.

Rochelle P. Gershenow has been promoted to director of membership services of the American Association of Colleges of Osteopathic Medicine.

Judith Lantz has been named chairperson of the National Capital Area Home Economists in Business. HEIB is a section of the American Home Economics Association.

The Washington, D.C., Estate Planning Council has elected new officers: President George R. Adams, vice president and trust officer of Riggs National Bank; Vice President James Van Story Jr., of Van Story & Co., an insurance firm; Treasurer Malvern J. Sheffield Jr., partner in the law firm of Arent, Fox, Kintner, Plotkin & Kahn, and Secretary Robert L. Jones, of the accounting firm of M. B. Hariton & Co.

Gerard N. Murphy has been designated a certified association executive by the American Society of Association Executives. Murphy is president of the Automotive Trade Association National Capital Area, which represents about 150 automobile dealers and 40 allied lines in the Washington area.