The chartered accountant, who is also non-executive director for five other companies, is a member of the 100 Group of Finance Directors, a group which includes FDs of the FTSE-100 index.
Rennocks has previously worked as executive director of finance at British Steel, and finance director of Powergen and Smith & Nephew.
The appointment comes during a period of high activity for OGS. The company, which develops drugs through the study of proteins, has recently signed a deal with Marconi, accelerated its drug development programme and begun clinical studies into a Gaucher’s disease drug.
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