Principal, Isham B. Johnson, Architect, Seattle, WA, c. 1915-1934. Johnson operated a solo practice sporadically, according to Seattle city directories. His name was listed in 1915 (operating in Room #3838 in the Evanston Building; 1919-1922 in Room #1064 of the Empire Building; in 1923 at 1024 North 38th Street;in 1929 in Room #208 Melhorn Building; and in 1934 at 4308 Eastern Avenue.

According to a brief obituary in the Seattle Times, Johnson came to Seattle from Walla Walla, WA, in 1900, at the age of 15. An automobile struck and killed Johnson at the corner of Broadway East and East Mercer Street in Seattle. In his last years, Johnson lived at 515 Harvard Avenue East.

In 1967, his sister, Mrs. Harry McLellan of Seattle, was still alive.

At his death, a son, Richard V. Johnson (then living in Clovis, CA), and daughter, Mrs. Earl Megahan (of Seattle), survived him.