In his new role, Justice Murray will lead the office which can investigate allegations of misconduct.
Justice Murray was admitted to practice law in 1965 and was appointed Crown prosecutor in 1973.
When he became Crown counsel in 1980, he reviewed the Criminal Code, which resulted in a raft of recommendations implemented by the government.
Justice Murray was the first Crown law officer to lead a law society or bar association when, in 1988, he became president of the Law Society of WA.
Murdoch University gave Justice Murray its highest award in 1999 - an honorary doctorate for his contribution to the institution as member of the university senate and later pro-chancellor from 1990 to 1999.
Justice Murray retired from the Supreme Court in January last year after 22 years.
He remains chairman of the Supervised Release Review Board for juvenile parole and is an adjunct professor at Murdoch University.