Ray Sinnott's varied career, mainly in design and development, began with several major companies including Dupont and John Brown. The main areas covered within these appointments were: Gas Production and Distribution, Nuclear Energy, Elastomers and Textile fibres. After his career in industry he joined the Chemical Engineering Department, University of Wales Swansea in 1970, specialising in teaching process and plant design, and other engineering practice subjects. The first edition of Chemical Engineering Design (Coulson and Richardson’s Vol 6) was published in 1983. Subsequent editions have been published at approximately 5 year intervals.Ray Sinnott retired from full time teaching in 1995 but has maintained close contact with the engineering profession.