He was the Labor member for Goyder in the Northern Territory Legislative Assembly from 2005 to 2008.
Warren was a geotechnical and geological engineering consultant before his entry into politics, working in both the Northern Territory and Papua New Guinea.
His first foray into politics was an unsuccessful run for the seat of Jingili in 1984.
However, a redistribution ahead of the 2008 election erased Warren's majority and made Goyder a notional CLP seat.
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