Principal, John Kewell, Architect, Los Angeles, CA, 1937-1945 and 1947-1950; Chief Designer, The Austin Company, Engineers and Builders, Cleveland, OH, and Los Angeles, CA, 1945-1946; (Kewell worked on a bridge in Los Angeles); Chief Designer, Stiles Clements Associates, Architects and Engineers, 1946-1947; Partner, Kewell, Kocher and Benedict, Architects and Engineers, Los Angeles, CA, 1950-1951; Principal, John Kewell and Associates, Los Angeles, CA, 1951-; in 1962, Kewell maintained an office at 1901 West 8th Street, Los Angeles, CA.

Critic, University of Southern California, School of Architecture, Los Angeles, CA, 1953-1954; Member, Housing Research Council, 1951-; Secretary, Housing Research Council, 1953-1954; President, Housing Research Council, 1956;

Consulting Architect, Ponderosa Pine Association, 1953;

American Institute of Architects Award for Contributions to the Profession, 1960;

Coursework, Montreal Technical School, Montreal, QC, Canada, 1931; B.Arch., McGill University, Montreal, QC, Canada, 1936; Graduate research work, Illinois Institute of Technology, Chicago, IL, 1942;

Bronze Medal for Architecture, Province of Quebec, 1931; Gold Medal, Royal Architectural Institute of Canada, 1936;

Kewell did a great deal of work for the Los Angeles Unified School District, designing schools in 1954, 1956, 1958 and 1960. Kewell noted in 1962 that he had published a book, Housing the Aged, in 1954, although no record of its publication can be found.