Southeastern Computer Consultants Inc. of Frederick appointed Stephen M. Duncan president and chief executive.

Legg Mason Wood Walker Inc. of Baltimore made the following appointments: Martin F. Mitchell, first vice president; Elizabeth A. Kane and Richard N. Young III, vice president; Matthew J. Armstrong, James P. Biestek, Elizabeth M. Fisher, Glenn L. Harshberger, Carol Ann Horan, George T. Neiman, Christopher B. Nystrom, Sean J. Richter, Ashley B. Scriber and Paul F. Strebel, assistant vice presidents.

Sideware Corp. of Herndon appointed Marie Russell vice president of channel sales and marketing.

The St. Regis Washington named Katie Brown maitre d'hotel of Lespinasse restaurant.

Softworks Inc. of Alexandria named Paul Webb managing director, Europe.

TRW of Reston named Jerry Agee vice president and general manager of the company's federal enterprise solutions strategic business unit.

Capital Reps of Reston appointed Lisa Hamilton GSA contract specialist.

Corine Sheridan was named director of marketing at Reznick Fedder & Silverman of Bethesda.

Geoffrey L. Ciniero joined the Annapolis Junction office of Morris & Ritchie Associates Inc. as chief engineer.

Fairfax-based Walcoff named Dixie Harvey director of business operations and Mark Fletcher vice president, enterprise solutions.

Widmeyer-Baker Group Inc. appointed Margaret Suzor Dunning and David Summers vice presidents in its Washington office.

Trung H. Trang was named managing director for multicultural development for New York Life Insurance Co. in Vienna.

Herrmann Advertising of Annapolis named Jennifer Council Jones vice president.

Syska & Hennessy of Fairfax named John Sporidis senior vice president.

Debra Sliz joined Morgan Meguire LLC of Washington as principal.

Smith Corporate Living of Arlington named Lawrence A. Guest vice president and general manager.

Sara DeCarlo will oversee civilian and military business development for Bell Atlantic's federal division.

First Washington Realty Trust of Bethesda named Allison Cooney marketing coordinator.

TrizecHahn Office Properties made the following appointments in the mid-Atlantic region: Holly H. Davis, regional vice president; Rodney A. Lawrence, vice president of development; Paul L. Schulman, director of leasing and portfolio management.

DataSource Inc. of Silver Spring named Gilbert Markbein chief financial officer.

Associations/Nonprofits The Maryland State Medical Society in Baltimore elected Wayne C. Spiggle president.

Gerald L. Thorpe was elected chairman of the board of the National Regulatory Research Institute in Baltimore.

The National Association of Securities Dealers Inc. of Washington appointed Edward S. Knight executive vice president and chief legal officer.

The American Health Lawyers Association in Washington named Peter M. Leibold executive vice president and chief executive officer.

The National Academy of Social Insurance elected Lawrence H. Thompson president.

The Mansfield Center for Pacific Affairs in the District named L. Gordon Flake executive director and Paige Cottingham-Streater deputy executive director.

The board of directors of the American Gas Association in Washington elected Cynthia Cordova vice president, market development.

The Construction Writers Association elected the following officers: Ron Worth, president; Gordon Wright, vice president. Dennis S. Day, Greg Sitek, Don Marsh, Jim Parsons, Karen Magliocca, and Shelley Hartnett were elected directors.

Mark D. Nelson was named vice president of federal relations for the Chemical Manufacturers Association in Arlington.

Education The University of Virginia's Northern Virginia Center in Falls Church appointed John F. Plummer Jr. business manager.

Media Discovery Health Media Inc. of Bethesda named Linda Yu vice president, general manager and Mark Foulon director of business development at

The National Geographic Society in Washington named three new members to its board of trustees: Joan Abrahamson, James H. Gilliam Jr., and Dennis R. Patrick. FinancialCardinal Financial Corp. of Fairfax appointed Greg D. Wheeless president of its planned community bank in Reston.

Marvin Goodfriend was named senior vice president and policy advisor for the Federal Reserve Bank of Richmond.

SLM Holding Corp. of Reston named Thomas A. Green senior vice president of its new technical outsourcing division.

Ralph J. Edwards was named president and chief information officer of First Virginia Services Inc. in Falls Church.

Send information about promotions, appointments and personnel moves in the Washington area to Appointments, Business News Department, The Washington Post, 1150 15th St. NW, Washington, D.C. 20071-5302. All material must be submitted in writing.