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Charles Day and John E. Zimmermann, both graduates of the University of Pennsylvania, established Day & Zimmermann in 1912, after Kern Dodge withdrew from Dodge, Day & Zimmermann. Building upon the foundation first constructed with Day and his friend from Germantown Academy days, Kern Dodge, were both associated with the Link-Belt Engineering Co. of Nicetown, Day & Zimmermann expanded operation into design, especially for industrial plant operations. Over the years of its operation, of course, the leadership positions at Day & Zimmermann have changed hands, and the resulting chart was published by Harold Yoh, Jr. in 1981: Presidents: Charles Day, 1916-1926; John E. Zimmermann, 1926-1929; W. Findlay Downs, 1929-1955; Theodore E. Seelye, 1955-1957; Thomas W. Hooper, 1957-1961; Harry M. Perks, 1976-?. Chairman: Charles Day, 1926-1931; Nicholas G. Roosevelt, 1931-1955; W. Dindlay Downs, 1955-1961; Harold L. Yoh, 1961-1976; William R. Moseley, 1976-1980; Harold L. Yoh, Jr., 1980- A company with diverse interests, Day & Zimmermann also has been successful in property appraisal, acquiring Cole-Layer-Trumble in 1975. By 1981 Harold Yoh, Jr., could boast that Day & Zimmermann consisted of seven profit centers: engineering and construction; architecture; consulting; operations management; technical services; physical platn security; real estate appraisal.
Written by Sandra L. Tatman.
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