Served in the United States Navy, 1917-1918; Draftsman, Chatten and Hammond, Architect, Chicago, IL, 1922; Draftsman, Marston and Van Pelt, Architects, Pasadena, CA, 1922-1924; Chief Draftsman, Wallace Neff, Pasadena, CA, 1925-1926; Principal, Robert H. Ainsworth, Architect, Los Angeles, CA, c. 1932.

President, American Institute of Architects, Pasadena Chapter, 1950; Chair, American Institute of Architects, Pasadena Chapter, Civic Affairs Committee, 1953; Member, Sierra Madre Planning Commission, 1952-1955; In 1955, Ainsworth was a Registered Architect in the State of California. Member, California Council of Architects, c. 1955.

Coursework, Lawrence University, Appleton, WI, 1914-1915; Coursework, Chicago Technical College, Chicago, IL, 1915-1917; B.S.A., University of Michigan, Ann Arbor, MI, 1921;

Elected to Tau Sigma Delta, University of Michigan, Ann Arbor, MI, 1921;

Born in Wisconsin, Ainsworth died in Los Angeles County, CA, at the age of 74. His last residence was in the 91024 of Sierra Madre, CA.

Married in 1927;

Ainsworth reported in 1955 having had two children;

Member, Pasadena Chamber of Commerce, c. 1955, Order of Masons, c. 1955, Alpha Rho Chi, Member, Tournament of Roses, Pasadena, CA, c. 1955, SSN: 551-30-9729.

• Shawano, WI (Architect's Birth)
  Shawano, WI

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• Sierra Madre, CA (Architect's Death)
  Sierra Madre, CA

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