* VSE, an Alexandria defense contractor, was one of seven contractors awarded a five-year Navy contract worth up to $1 billion. VSE will provide engineering and technical services to support Naval Sea Systems Command maintenance, overhaul, repair and alteration of ship systems aboard ships. Shares of VSE closed yesterday at $26.28, an increase of $7.78, or 42 percent.

* SI International, a Reston information technology company, won the right to compete for task awards that are part of the Department of Commerce's Commerce Information Technology Solutions Next Generation (COMMITS NexGen) contract. The contract is worth up to $8 billion over five years.

* Human Genome Sciences, a Rockville drug developer, said that it intends to privately offer $200 million in convertible subordinated notes, and to grant initial purchasers of the notes a 30-day option to purchase up to an additional $50 million of the notes. The company will use the net proceeds to repurchase a portion of its outstanding debt.

* Nextel Communications of Reston said it repurchased 6 million shares of its stock for $218.5 million. The company said it wanted to reduce shares on the market and increase its ownership in Nextel Partners, an affiliated company that sells the Nextel brand in smaller markets. With the transaction, Nextel will have 1.1 billion shares outstanding and will own 32 percent of Nextel Partners. Motorola, Nextel's largest vendor, which sold some of the shares to Nextel, now owns 6.9 percent of the company.

Compiled from reports by Washington Post staff writers.