"serve in the capacity of" is correct and usable in written English.
This phrase can be used to describe a person who does a particular job for a certain period of time, often in a volunteer or temporary position. For example, "He served in the capacity of manager at the local non-profit organization for two months."
At approximately 9.00pm I was asked by the President to serve in the capacity of Acting Attorney General.
In addition, The New York Times asked the State Department to provide the titles and job descriptions of other individuals the department has permitted to serve in the capacity of special government employee, and whether any of Mrs. Clinton's other political appointees were given the special designation.
At approximately 9 00 p.m., I was asked by the President to serve in the capacity of Acting Attorney General.
While I will no longer serve in the capacity of president of College Democrats, I'm excited to announce that I will continue to serve the Democratic Party as a Fellow in the DNC's Voting Rights Institute.
She was appointed by the U.S. Department of Commerce, National Institute f Standards and Technology to serve in the capacity of Examiner on the 2004 Board of Examiners of the Malcolm Baldrige National Quality Award.
The New York Times asked the State Department to provide the titles and job descriptions of other individuals the department has permitted to serve in the capacity of special government employee, and whether any of Mrs. Clinton's other political appointees were given the special designation.
The training described in this subparagraph shall not be required, but is recommended, for a tribal governing body that serves in the capacity of a school board.
Rosenstein was merely serving in the capacity of Acting Attorney General for the limited purpose of allowing Jeff Sessions, the official Attorney General for all other purposes, to recuse himself from any matters arising from the presidential campaign.
Even volunteers who aren't handling returns but serving in the capacity of greeters and receptionists must pass a test on ethics and confidentiality.
From February 1998 through September 2000 he served in the capacity of president for retail operations with Adidas America.
This finding is related to the fact that most nurses working at the health facility level in Zambia served in the capacity of district managers of health programmes.
