Trevor Kletz

Trevor Asher Kletz, OBE, FREng, FRSC, FIChemE (1922–31 October 2013) was a prolific British author on the topic of chemical engineering safety. He is credited with introducing the concept of inherent safety, and was a major promoter of Hazop.

Kletz was born in 1922 in Darlington of Jewish parents, from a Russian immigrant background. He attended The King's School, Chester, then the University of Liverpool, where he graduated in chemistry in 1944 and joined ICI the same year. During the Second World War, he was a member of the Home Guard. In 1959 he married Denise (died 1980) and they had two sons.

In ICI he worked initially as a research chemist, then became plant manager (in turn) of iso-octane, acetone and tar acids plants. After further experience in process investigation and commissioning in the Technical Department, in 1961 he became assistant works manager on the Olefines works. In 1968, he was appointed the first Technical Safety Advisor.

During this time, ICI developed hazard and operability studies, now known as Hazop, for which he was an enthusiastic advocate, and the author of the first book on the subject.

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