* Tier Technologies of Reston, a provider of transaction processing and systems integration for the public sector, earned $914,000 (5 cents per share) on revenue of $40.7 million in its third quarter ended June 30, compared with $2.1 million (11 cents) on $43 million in revenue during the same period a year ago.

* Analex, an Alexandria company that provides intelligence, systems engineering and security services for the government, said it lost $1.8 million (13 cents a share) in the second quarter because of non-cash financing charges and a discontinued operation, compared with profit of $674,000 (4 cents) during the corresponding period last year. Revenue rose 44 percent to $22.2 million from $15.4 million a year ago. For the six months ended June 30, Analex reported a loss of $3 million (22 cents) on $38.8 million in revenue, compared with a gain of $1.4 million (8 cents) on $30.7 million in revenue a year ago.

* Primus Telecommunications, a McLean telecommunications provider that operates internationally, reported a loss of $15 million (17 cents a share) on $332 million in revenue for the second quarter, a reversal from the same period a year ago, when the company earned $20 million (21 cents) on $320 million in revenue. For the six months ended June 30, Primus said it lost $25 million (28 cents) on $680 million in revenue, compared with a gain of $31 million (34 cents) on $620 million in revenue in the year-ago period. The company said it was set back by competitors' increased product bundling and the continuing decline of wire-line long distance. It said it is accelerating its bundled offerings and Internet calling services.

* VSE Corporation, an Alexandria engineering solutions company, said earnings for the second quarter rose to $854,000 (37 cents a share) from $436,000 (20 cents) during the same period last year. Revenue increased to $54 million from $29 million. For the six months ended June 30, the company earned $1.6 million (68 cents) on $97 million in revenue, compared with $868,000 (39 cents) on $56 million in revenue during the same period a year ago.

* Advancis Pharmaceutical of Germantown reported a second-quarter loss of $8.5 million (37 cents a share) on $854,000 in revenue, compared with a loss of $4.2 million ($4.02) during the same period a year ago. The company reported no revenue in the year-ago quarter. For the six months ended June 30, Advancis reported a loss of $19.1 million (84 cents), compared with a loss of $7.5 million ($7.37) a year ago.

* OPNET Technologies, a Bethesda provider of management software for networks and applications, earned $2 million (10 cents a share) on $17 million in revenue during its first fiscal quarter, compared with a gain of $764,000 (4 cents) on $12 million in revenue during the year-ago period.

* TeleCommunication Systems, an Annapolis wireless data technology company, reported a second-quarter profit of $863,000 (2 cents a share) on $40.4 million in revenue, compared with a loss of $11.4 million (38 cents) on $20 million in revenue a year ago. For the six months ended June 30, the company lost $2.6 million (8 cents) on $73 million in revenue, compared with a loss of $15.4 million (52 cents) on $39.4 million in revenue during the period last year.

* Guardian Technologies of Dulles, an imaging technologies company, said it has acquired Wise Systems of Corsham, England, a developer of radiology information systems. Guardian will pay Wise's two stockholders $1.9 million in cash and $500,000 in Guardian's common stock.