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born in Camden, NSW
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He finished his secondary education as a boarder at Scots College in Sydney
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Clarke then went to the University of Sydney graduating with honors from an MB, BS degree
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Clarke start working at the Royal Prince Alfred and North Shore Hospitals as a resident medical officer
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specialising as a registrar in neurosurgery and otolaryngology
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Clarke left for England, starting working as senior house surgeon at the Royal National Throat, Nose and Ear Hospital (1962) and senior registrar in otolaryngology at the Bristol General Hospital (1963).
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Clark returned to Australia and the Royal Victorian Eye and Ear Hospital as assistant and then senior ENT surgeon
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He held this position concurrently with ENT surgery positions at the Alfred, Austin and Repatriation General Hospitals
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Clark returned to the University of Sydney to embark on further study. He completed both an MS (1968) and a PhD degree (1969).
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In 1969, Clark accepted the William Gibson chair of otolaryngology at the University of Melbourne
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In 1984 Clark founded the Bionic Ear Institute and acted as its director until 2005.
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Clark established the Cochlear Implant Clinic at the Royal Victorian Eye and Ear Hospital and was the surgeon in charge
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Professor at the University of Wollongong
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Distinguished professor at La Trobe University
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He distinguished researcher at the ICT for Life Sciences.