He represented Albert County in the Legislative Assembly of New Brunswick from 1897 to 1908 as a Liberal member.
Osman was born in London, England, was educated in Hertfordshire and later emigrated to New Brunswick.
He was the manager of a plaster mill and quarries at Hillsborough.
He was first elected in an 1897 by-election held after William James Lewis was elected to the House of Commons of Canada.
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