A former Western Australian politician in favour of the state’s secession from the Commonwealth has joined Minter Ellison in Perth.

Norman Moore, previously a WA state member of parliament for 36 years, has joined the firm as a consultant. Moore is a former Minister for Mines and Petroleum, Fisheries and Electoral Affairs, and government leader in Western Australia's Legislative Council.

Moore has been critical of Commonwealth intrusion into state responsibilities. "Increasingly, the states are becoming simply service deliverers of Commonwealth government policies because the Commonwealth has the money,” he said in his final speech to parliament. "The only way that the state can control its future if it wants to, is to secede."

Moore's remit with the firm will focus on assisting with issues relevant to mining and petroleum legislation and providing guidance on parliamentary procedures and processes at both the local and federal level.