"under whose administration" is correct and usable in written English.
You can use it when referring to a specific person or group of people who are managing or have been managing a particular situation or organization. For example: "The school has greatly improved under whose administration of the new principal."
It is named after the French president Georges Pompidou, under whose administration the museum was commissioned.
He heaped praise on Mr. Moi, under whose administration Kenya has nearly collapsed.
But the two nations are still arguing over which areas were under whose administration before the war broke out.
But arguments over which areas were under whose administration before the war began has delayed the withdrawal of troops and the deployment of the United Nations' peacekeeping mission.
These gestures have helped erase memories of Andrés Pastrana, his immediate predecessor, under whose administration violence spiraled out of control, and of Ernesto Samper's corruption-riddled presidency, which ended in 1998.
Xi Jinping replaces Hu Jintao, under whose administration China has seen a decade of extraordinary growth.
There are thousands of interviews to be conducted, including those of two former presidents, Fernando Belaúnde Terry and Alan García Pérez, under whose administrations most of the violence took place.
Fears of Lower Standards The age and education level of lower-ranking patrol officers have risen under Mr. Giuliani, whose administration raised the entry age from 20 to 22 and required new officers to have two years of college.
The practice continued under Mayor David N. Dinkins in the early 1990's, and strikingly increased under Mayor Giuliani, whose administration struck deals providing more than $2 billion in benefits to more than 50 companies, including Merrill Lynch, Credit Suisse First Boston, Travelers and The New York Times.
Under Bill Clinton, in whose administration I am proud to have served, even the wages of the poorest fifth rose.
The latest total adds pressure on President François Hollande, whose administration is under attack for not doing enough to fix the economy.
