The bank has named acting wealth advice boss Greg Miller as Mr Flavell's permanent replacement, with MLC and NAB Wealth group executive Andrew Hagger describing him as respected within the organisation and across the financial services industry.
“His extensive knowledge of our business and the industry means he is best placed to deliver for our customers and advisers," Mr Hagger said.
“We are part of a constantly evolving industry. Advice needs are changing and we need to continue to strengthen our business to ensure more Australians are receiving the financial advice they need to protect and growth their wealth."
Commenting on his appointment, Mr Miller said: “I am excited to lead a strong business that is well placed to support the ongoing financial needs of Australians.”
Mr Miller has held a number of positions at NAB, including leading MLC's self-employed licensees and the formation of MLC Direct in 2011.
John Flavell left to join Mortgage Choice in January 2015, following the resignation of longtime chief executive Michael Russell.