Moulder graduated from the
University of Chicago with a bachelor's degree in 1941 and a Ph.D. in biochemistry in 1944. From 1944 to 1945 he was a research associate in malaria at an
Office of Scientific Research and Development project in Chicago. In the early part of his career he did research on the biochemistry and immunology of
Plasmodium and
Trypanosoma. At the University of Chicago he was an instructor from 1946 to 1947 and was appointed to an assistant professorship in 1947. For the academic year 1952–1953, Moulder was a Guggenheim Fellow. From 1952 to 1953 he was a senior Fulbright scholar at the
University of Oxford, UK. In 1954 he received the
Eli Lilly and Company-Elanco Research Award. After retiring from the University of Chicago, Moulder and his wife moved to
Tucson, Arizona. Until 1998 he advised students and faculty in the
University of Arizona's department of microbiology and immunology. He and his wife had three daughters and a son. He was predeceased by his wife and two of his daughters. Upon his death he was survived by one daughter, one son and five grandchildren. ==Selected publications==