What communications officer was on the staff of a fleet admiral in the United States Navy?
John R. Redman: John "Jack" Roland Redman (January 31, 1898 – May 29, 1970) was an admiral in the United States Navy. John R. Redman:  A naval communications officer, he played key roles in signals intelligence during World War II in Washington, D.C., and on the staff of Admiral Chester W. Nimitz. Chester W. Nimitz: Chester William Nimitz, Sr. ( ; February 24, 1885February 20, 1966) was a fleet admiral of the United States Navy.
John "Jack" Roland Redman