Second National Federal Savings Bank plans to form a holding company called Second National Bancorporation.

The holding company would provide Salisbury, Md.-based Second National with greater flexibility to gain access to capital, said Henry Berliner Jr., president and chief executive.

Berliner also said the holding company would provide operating advantages if Second National seeks to expand through acquisitions or the creation of subsidiaries. Shareholders must still approve formation of the holding company. A vote on the proposal is scheduled for Aug. 17. Second National, with assets of $1.5 billion, is one of Maryland's largest thrifts.

Martin Marietta Corp. will hire as many as 40 more workers at its Glen Burnie, Md., plant to complete a $145.7 million Navy contract, company officials said. Under the contract, Martin Marietta will produce a new model of an underwater listening device that detects and tracks the movements of submarines and surface ships.

The equipment, towed-array sonars, will be manufactured here at the company's Aero & Naval Systems Unit. Most of the new workers will be electronics and software engineers, said Buzz Bartlett, a spokesman for Martin Marietta.

Fourteen business law attorneys at the Richmond law firm Browder & Russell have joined another city law firm, Williams, Mullen, Christian and Dobbins, the two firms announced.

Browder & Russell is restructuring to concentrate its practice on litigation and the move is part of that strategy, a statement said.

Williams, Mullen, the city's fourth-largest law firm, now will have 78 lawyers providing legal services to business clients.

Ogilvy & Mather Public Affairs in Washington will be renamed Powell Adams & Rinehart: An Ogilvy Company under a restructuring of the Ogilvy Public Relations Group. Former White House press secretary Jody Powell is chairman of the Washington unit.

Snack Hostess Inc. of Fairfax acquired Philadelphia-based Coffee Plan Coffee Service, opened a 17,000-square-foot distribution center in Beltsville and changed its name to Premier Services. Terms of the Coffee Plan acquisition were not disclosed.

Haynes & Miller, the Washington-based law firm, merged its practice with the Washington office of Cleveland-based Arter & Hadden and formed a public finance practice group.

S. Laird Jenkins Corp. of Arlington acquired the Corporate Communications Group Inc. of Herndon for an undisclosed amount.

RDS Capital Partners Inc. of Fairfax, a privately held merchant banking firm, acquired Amsco Sales Corp. of Fairfield, N.J., a distributor of specialty non-corrosive pipes and valves, for an undisclosed amount.

Caterair International of Washington won contracts totaling more than $25 million to provide in-flight food service for TransWorld Airlines in Paris, Pan American World Airways in Los Angeles, Cathay Pacific Airways in Los Angeles, TAP Air Portugal in Rio de Janeiro, British Midland Airways, Ltd. in Paris, KLM Royal Dutch Airlines in Paris and GB Airways Ltd. in London.

KSK Communications Ltd. of Tysons Corner was awarded a marketing and communications contract for World Direct Ltd. Inc. of Nanuet, N.Y., an international telephone calling card service.

Gould Group Inc. of Rockville received advertising and marketing contracts from Candy Express, a franchise of retail candy stores in suburban Maryland and Virginia, Cohen Podiatry Centers in Crystal City, Alexandria and Rosslyn, Cor/Net of Rockville, the Window Touch of Rockville and Monument Ford of Baltimore.

The Adams Group of Rockville formed a division for planning and managing promotions and events.

John H. Snyder Associates Inc. of Crofton won a public relations contract from the Oil Heat Dealers of the Mid-Atlantic Petroleum Distributors' Association of Washington.

Cooper-Lecky Architects of Washington was awarded a contract by the Baltimore District of the U.S. Army Corps of Engineers to provide architectural, engineering design and construction administration services for the Korean War Veterans Memorial in Washington. Construction is expected to begin in December 1991.

Laporte Advertising Inc. of Bethesda won a contract to create promotional and advertising materials for the East Coast Builders Conference, which will be held in Washington in October.

The Donohoe Construction Co. of Washington received a $1.7 million contract to demolish three hangars at Washington National Airport to make way for a 35-gate airline terminal.

Charles E. Walters and Jonathan A. Intrater formed Walters/Intrater & Associates Inc., which offers financial consulting to the communications industry, in Bethesda.

Lena S. Barnett opened law offices in Rockville.

Richard Hopkins opened Hopkins Foodservice Specialists Inc. in Potomac.

Douglas A. Mertes opened the Retail Source in Burke, a management consulting and executive search firm specializing in the retail industry.

Cellular One of Greenbelt introduced Message Plus, a voice mail system for cellular telephones.

Radio Satellite Corp. of Washington introduced a mobile satellite system to support nationwide radio broadcasts and other communication services to cars, trucks and other vehicles.

Announcements of news and developments affecting Washington area companies should be sent to Regional Report, Business News Department, The Washington Post, 1150 15th St. NW, Washington, D.C. 20071.