Najeeb E. Halaby, regal father-in-law, venture capitalist, and former chairman and president of Pan American World Airways, has been tapped as chairman of the board of Janelle Aviation, a Leesburg-based aviation management and service organization.

James M. Haynes Jr., president, chief executive and founder of Janelle, said that Halaby's election to the post will "significantly contribute to our role in the growing aviation markets in the Greater Washington and Northern Virginia areas."

A former administrator of the Federal Aviation Administration under President Kennedy, Halaby was the hand-picked successor to Juan Trippe, chairman and founder of Pan Am. Halaby held the post of chairman from 1970 until 1972, when he resigned in the face of mounting problems for the airline. The combination of higher costs, stiffer competition and the inability to secure domestic routes brought heavy losses for Pan Am in the early '70s.

Since then, Halaby has headed his own international investment firm, Halaby International, financing ventures in the Middle East, Hong Kong and the United States. He currently serves on the boards of Bank of America, Chrysler Corp., and De Havilland Aircraft, a Canadian aircraft manufacturer. Halaby is the father of the former Lisa Halaby, now Queen Noor of Jordan, and has been chairman of the board of trustees of the American University of Beirut since 1982.

"I am extremely optimistic about the potential of Janelle Aviation at Leesburg's dynamically expanding airport," Halaby said. "This company stands in a position to fully participate in the rapid growth of Northern Virginia, stimulated by Dulles Airport."

The 4 1/2-year-old Janelle is involved in a range of aviation services, including aircraft sales, executive charters, aircraft and airport management, flight training, and flight line services to business, government and private individuals. Haynes indicated the company's annual revenue is between $2 million and $5 million.

The firm said it has assisted the Leesburg Municipal Airport in a major expansion over the past four years, including installation of an FAA automated flight service station. Upon completion of the station, Haynes said, Janelle will employ up to 175 people at the Leesburg facility. Projects to legnthen and widen the runway, enlarge aircraft parking ramps and build new hangars also are under way.

Haynes said that, with the recent announcement by Xerox of plans to develop its Leesburg property as the location for a number of major corporate headquarters, the Leesburg Airport facility will become increasingly important to corporate and general aviation.