Fairfax-based ManTech International said last week its quarterly profit fell nearly 34 percent in the face of declining customer demand.

The company reported profit of $20.2 million (55 cents a share) for the three-month period ended Dec. 31, down from nearly $30.5 million (83 cents) in the same period a year earlier. Quarterly revenue dipped about 9 percent to $621.8 million.

Kevin M. Phillips, ManTech’s chief financial officer, said during a call with investors last week that some purchases were “pulled back due to reduced customer demand.”

The company said it is still gaining new customers for HBGary, a cybersecurity company ManTech bought to handle commercial work.

But so far, “sales are smaller and more incremental than expected,” Phillips said.

Ball Aerospace takes over NGA contract

Ball Aerospace & Technologies, which has offices in Chantilly and the District, has completed a deal with Chantilly-based OGSystems and the National Geospatial-Intelligence Agency to take over responsibility of a contract.

Under the deal, Ball will become prime contractor for the the NGA’s Total Applications Services Enterprise Requirements program, which OGSystems won in 2010. Ball will provide analysis, engineering, integration and IT services.

Alenia North America names new CEO

Alenia Aermacchi North America has named Benjamin R. Stone president and chief executive, taking over from Alan E. Calegari. Stone has served as the chief of staff of the Italian company’s North American subsidiary, based in the District.

Alenia Aermacchi is a Finmeccanica company.

An Alenia spokesman said the company has also reshaped its North American unit, including cutting fewer than 10 employees from its roughly 70-employee staff.

GAO upholds protest against Deloitte

The Government Accountability Office has upheld a protest filed by Nexant of the District against Arlington-based Deloitte Consulting over a U.S. Agency for International Development program.

The contract was to provide help in establishing a private financing advisory network in Asia that would assist Asian businesses and governments in moving forward with clean energy projects.

The GAO said the agency failed to provide Nexant meaningful discussions and made an “unreasonable” selection decision.

The report recommended USAID reopen the acquisition, engage in new discussions, evaluate revised proposals and make a new decision. The GAO also recommended the agency reimburse Nexant the costs of filing the protest.