Over the past 27 years McFarlane has been the main board director of five of the world's leading financial institutions and for a decade was the CEO at ANZ.
"This experience, coupled with his strong customer and employee focus, will be invaluable to
Westpac as the organisation executes its strategy and implements its response plan for the AUSTRAC statement of claim," Maxsted said.
Maxsted announced his intention to bring forward his retirement to early 2020 in November last year as the bank was engulfed in a money-laundering scandal over allegations it failed to vet thousands of payments.
A lawsuit by the Australian Transaction Reports and Analysis Centre (AUSTRAC) alleged that Westpac had breached anti-money laundering laws 23 million times and followed confirmation the prudential regulator was also investigating the bank.
Maxsted was not the only casualty of the scandal as CEO Brian Hartzer also stood down.
It was widely reported at the time that Hartzer would walk away with his A$2.7 million ($2.8m) salary but would forfeit up to A$20m in bonuses.