The phrase "a special headquarters" is correct and usable in written English.
It can be used to refer to a unique or designated location where an organization conducts its operations or activities.
Example: "The organization established a special headquarters to coordinate relief efforts during the crisis."
Alternatives: "a designated headquarters" or "a unique headquarters".
The government's presence on the high ground includes elements of two brigades of the Republican Guard, a Special Forces headquarters and many artillery or rocket positions from which Syria's military routinely fires barrages, rebels and city residents say.
The 10th Mountain Division Headquarters and Headquarters Battalion is a special troops battalion of the United States Army headquartered at Fort Drum, New York.
In their battalion headquarters, a special flag was displayed prominently on the wall.
The C.I.A. tried to step up its surveillance of Mr. bin Laden, creating a special group at its headquarters to track his movements.
In "The Office," at 9, Dwight (Rainn Wilson) is assigned a special project at Sabre headquarters in Florida, and he decides to take some of his co-workers with him.
It has not done so, although Gary Boggs, a special agent at D.E.A. headquarters in Washington, said the agency had started looking into whether to make MDPV and mephedrone controlled Schedule I drugs like heroin and ecstasy.
The favour reportedly earned the then-head of the Macedonian intelligence service a special trip to CIA headquarters in Langley, Virginia to receive an award from the hands of George Tenet, who headed the agency at the time.
Tony Abbott makes a special trip to AFP headquarters in order to deliver a national security speech, flagging (excuse the dreadful pun, there were actually six flags at the event) amendments to the Citizenship Act allowing the government to revoke or suspend the Australian citizenship of dual nationals.
Today Kleiner Perkins is holding a special event at Facebook headquarters to announce the launch of a new $250 million social-centric sFund, which will foster a new generation of companies tapping into the social graph.
