Deputy White House press secretary Walter W. Wurfel will join Gannett Co. Inc. as director of information for Washington on June 1.

Wurfel will be in charge of public affairs for Gannett and in community-related activities in Washington for its 78 daily newspapers.

"Walt Wurfel's recent experience as liaison with the press outside of Washington will be especially valuable in this new Gannett role," said Allen H. Neuharth, Gannett chairman and president, "along with his excellent credentials as a journalist and executive in both newspaper and broadcasting."

Wurfel has served as deputy press secretary at the White House since January 1977.

His journalistic experience includes: foreign and later political editor of the St. Petersburg Times; general manager and managing editor of the Northern Virginia Sun; general manager and editor of Straus Editor's Report, a media newsletter; anchorman for a San Juan television station and reporter for the Washington Star.

J. William Middelton has been elected president of the Equitable Trust Co. of Baltimore. Middelton also was named director of the bank and the Equitable Bancorporation, the multibank holding company that owns Equitable Trust. Middelton succeeds H. Grant Hathaway, who was named chairman of the board.

Robert J. Mulligan, senior vice president-finance and treasurer for Woodward & Lothrop, has been promoted to executive vice president, effective April 30.

Mulligan joined Woodies in 1975 as vice president-finance and treasurer. Before that, he was senior vice president-finance of Gimbel's in New York.

John F. Gallucci has been named vice president, controller, for Woodward & Lothrop Inc.

He was formerly vice president-finance for Liberty House. Earlier he was controller for Gimbel's.

Citicorp Industrial Credit Inc. has named William H. McBarron, of the firm's Lanham office, area head of equipment-finance leasing. His duties will include all marketing and client relations for commercial and indutrial companies and nonprofit groups in Maryland, Washington, Virginia, Delaware and Prnnsylvania.

McBarron joined Citicorp in 1972 and has been in finance since 1966. Previously he was a branch business and credit manager with White Truck division of White Motor Co. Inc.

John M. Sewards of Firris & Co. Inc. has been elected president of the Security Traders Association of Washington, D.C. Other newly elected officers include: Wendie L. Wachtel, vice president of Wachtel & Co., second vice president; and Paul A. Keat of Dean Witter Reynolds Inc., secretary-treasurer.

Timothy E. Hall has been elected vice president, corporate banking division, for American Security Bank NA. Hall joined American Security in 1977 and was formerly assistant vice president in the financial institutions group.

Linus G. Schwartz has been promoted to executive vice president of Scope Inc. He had been vice president of the Reston firm.

Schwartz was one of the founders of National Controls Inc. in 1965 and served as president until 1977, when he became vice president of Scope.

Scope also announced the retirement from the board of directors of the company's founder, Richard E. Williams.

Paul E. Keane has been elected to the newly created position of executive vice president of the Penril Corp.

Keane has served as chief financial officer and vice president of Penril over the past five years. Befor coming to Penril, he held senior management positions with Integrated Systems Inc., the Singer Co. and Baird Atomic Inc.

Michael F. Ryan has been elected senior vice president at National Savings and Trust Co. Before joining NS&T, Rayan was with American Security and Trust Co. for 15 years.