The story
The firm was founded in 1964 by Egon P.S. Zehnder. In 1992, Zehnder, who at the time was 62, had transitioned out of running the firm and that A. Daniel Meiland, who had been the firm's regional director for North America, would be named chairman of the executive committee and chief executive officer.
By 2000, Egon Zehnder was the largest executive search firm in Europe.
From Wikipedia’s article on Egon Zehnder, shared under CC BY-SA 4.0.4