Raynor Asher graduated BA, LLB (Hons) from the Auckland Law School in 1972. He was a Senior Scholar in Law. He was also the New Zealand Harkness Fellow to the United States in 1973-74 and graduated with a Masters of Laws from the University of California (Berkeley) in 1974.
Raynor was a partner at Kensington Haynes & White and Kensington Wallace (later Kensington Swan) from 1976-86, and in 1986 commenced practice as a barrister sole. In 1992, he took silk.
He has held the role of president, vice president or Chair for various organisations.
He was appointed to the High Court Bench in 2005 and to the Court of Appeal in 2016. He retired in March 2019, and resumed practice at the Bar as an arbitrator and mediator, and giving litigation and other advice.