The part of the sentence "has been operating from" is correct and usable in written English.
You can use this phrase when referring to an organization or business that has been based in or running from a specific location for a period of time. For example, "McDonalds has been operating from this location for over ten years."
Hsu Fu Chi was founded by four brothers from Taiwan and has been operating from southern China since the early 1990s.
Somalia's prime minister, Mohammed Ali Geedi, announced that the country's three-month-old transitional government, which has been operating from Kenya, would soon move to Mogadishu.
In addition to releasing the list of 85 terrorism suspects, Saudi officials made a striking accusation: one of the men on it, Abdullah al-Qarawi, is a Saudi who has been operating from Iran for three years.
Since being granted asylum in the UK in 2003, Mr Berezovsky has been operating from his mansion on the Wentworth estate, near Weybridge, Surrey, and an office in Mayfair.
Asia Cell has been operating from the northern Iraqi province of Sulaimaniya since 2000, where it has 55,000 subscribers, and its new contract will expand its concession to cover Dohuk, Mosul, Erbil, Kirkuk and Tikrit.
But the attack would not stop the network from broadcasting, said Mostefa Souag, the director of news for Al Jazeera Arabic, because the channel has been operating from other locations since early this week when police officials began preventing employees from entering the bureau.
For this study, nationwide database of Korean AML Registry, which has been operated from 2007 by the Korean Society of Hematology AML/Myelodysplastic Syndrome Working Party, was analyzed.
Although the number of patients used in this study was lower (92 patients), these enrolled patients consisted of about 31% of the total pediatric ESRD patients in our country, the so called 'The Korea Pediatric CKD registry', which has been operated from 2007 to 2010.
"Obviously, in my case I have been operating from the margins, whether in Puerto Rico or in Texas," Ramírez told me.
The New Delhi police recently announced the arrest of Abdul Karim Tunda, an explosives expert who had been operating from Pakistan and who was also detained along the border with Nepal.
United States and allied forces face a resilient Taliban, as well as Qaeda militants, who have been operating from sanctuaries in northwestern Pakistan.
