R. Wade Pearson has been named Mid-Atlantic Showman of the Year by the National Association of Theater Owners. Pearson is a board member and vice president of Neighborhood Theaters, in charge of the firm's Northern Virginia and southern Maryland divisions. He is also president of the Metropolitan D.C. chapter of the National Association of Theater Owners.

James R. Bell Jr. has been appointed director of personnel for the Mutual Broadcasting System. Bell was formerly with International Harvester Co.

Joyce A. Everett has been appointed vice president of administrative services for Comsearch Inc., a company that provides engineering services for satellite earth stations, cellular radio and microwave systems.

Bennetta B. Washington has joined the public relations firm of van Kloberg & Associates as a senior associate.

Lawrence F. Mihlon has been named president of the Washington division of Manning, Selvage & Lee Inc., succeeding Jean O. Rainey, who has been appointed chairman and chief executive officer of the public relations firm's office here. Mihlon was formerly vice president of corporate relations at the Singer Co.

Andrew F. Tully Jr., an author and syndicated columnist for McNaught Syndicate, has been named the Heritage Foundation Distinguished Journalism Fellow of 1982-'83. Tully will use his fellowship to write a book on the Central Intelligence Agency, according to the foundation.

Harold J. Detlefs has been elected vice president of marketing for Comsat General Telesystems. Detlefs was formerly national sales manager for Digital Communications Corp.

Heather M. David has been promoted to senior vice president of Wagner & Baroody Inc. She has been the account executive for the American Enterprise Institute for Public Policy Research since 1975.

Howard F. Roycroft, a partner in the law firm of Hogan & Hartson, has become a member of the board of United Television Inc.

Mary Jane Kolar has been named executive director of Women in Communications Inc. She was previously director of education for the National Moving and Storage Association.

William D. Bradford, professor of finance at the University of Maryland, has been named to the board of economists of Black Enterprise magazine.

Harry Linowes, managing partner of the accounting firm Leopold & Linowes, has been elected to the advisory board of WAMU-FM.

Marilyn Hayden has been promoted to manager of special projects at WJLA-TV. She was formerly an account executive.

Betty Kirkland has been named director of promotion and advertising for WGMS-AM/FM. She was previously president of Newsbreakers Inc.