The Retired Officers Association, now based in downtown Washington, has contracted to purchased the four-story Washington-Lee Savings and Loan Association building at 201 N. Washington St., Alexandria, for $1.1 million. The 12-year-old building will be used as a national headquarters by the group, which represents retired military officers. The group plans to move there next year and will occupy space on two upper floors. The S&L has a long-term lease on the first floor and mezzanie.

Melody Gilsey, a fashion coordinator, and Elaine Jenkins, head of the One America consulting firm, were elected temporary co-chairwomen of the new Fort Lincoln New Town Foundation, which plans to promote educational, cultural and recreational programs for residents of the new town in Northeast Washington. There now are 97 families living in Fort Lincoln townhouses and apartments and more are scheduled to move in this month. An eventual population of 15,000 is anticipated.

A.G.Denice, Inc., an Arlington-based mortgage banking firm, has announced the inauguration of computerized mortgage loan servicing under Alta Jones, who was recently promoted to manager of loan servicing. The firm headed by Anthony G. Denice also has expanded its branch office in Fredericksburg. Va., where the new manager is Jefferson D. Phelps III.

A day-long seminar on the rehabilitation of apartments will be held May 18 at the Ramada Inn in Lanham under the sponsorship of Chapter 8 of the Institute of Real Estate Management here. Information is available by calling Elton F. Young, Jr., at 474-6207. Loren simkowitz will be seminar leader.

The Sales and Marketing Council of the Northern Virginia Builders Association, in cooperation with the Suburban Maryland Builders and the D.C. Builders Association, will sponsor a seminar on face-to-face selling on May 18 at the Ramada Inn in Rosslyn. David Stone will be the speaker. For information, call 893-6800.

Tod R. Hullin, former deputy Secretary of Defense, has been named vice president of real estate services of Interstate General Corp., which is developing the new community of St. Charles in Charles County, Md. Hullin has been named to oversee the management of Capitol Park Towers, a 936-unit high-rise complex in Southwest, which now is owned by Interstate General.