Robert J. McCloskey, a career foreign service officer for more than 25 years, will become The Washington Post's ombudsman Nov. 1.

His appointment was announced by Executive Editor Benjamin C. Bradlee, who said McCloskey will serve in the position for two years.

McCloskey, 58, will be responsible for monitoring the newspaper for fairness, accuracy and relevance; for writing occasional columns dealing with the news business, and for responding to reader complaints.

The position of ombudsman was created at The Post in 1970, and McCloskey will be the sixth person to serve in the job. His predecessor is Bill Green, who filled the position for a year while on leave from Duke University. Green has returned to the university.

McCloskey retired from the foreign service this fall after serving as ambassador to Greece. He joined the State Department in 1955, and served in Hong Kong for two years.

He returned to Washington in 1957, and was assigned to the Bureau of Public Affairs. For the next 16 years, he dealt with the Washington press corps in various capacities, as deputy assistant secretary of the bureau, as official spokesman for the State Department, as a special assistant to secretary of state William P. Rogers and as deputy assistant secretary of state for press relations.

In 1973, he became ambassador to Cyprus. He then served as ambassador at large, assistant secretary of state for congressional relations and ambassador to the Netherlands before going to Greece.

McCloskey was born in Philadelphia, served in the Marine Corps from 1942 until 1945 and was graduated from Temple University in 1953. He later studied at George Washington University.