Investor Daily received email confirmation that Ms Watts will fill the position previously held by Bernadette Inglis, who left Westpac to head up Newcastle Permanent.
Meanwhile, the head of business banking at St George, Cathy Yuncken, will become general manager of private wealth at Westpac from 1 May.
Stuart Zalunardo has been named general manager of business banking at St George.
The reshuffle comes after the major bank last month announced plans to restructure its wealth management business, which saw long-serving consumer bank CEO George Frazis and BT Financial CEO Brad Cooper leave the company.
As part of the changes, the bank is realigning its BT Financial Group into its consumer and business divisions, no longer retaining the financial services business as a standalone division and selling off parts of its advice sector to Viridian Advisory.
The private wealth, platforms and investments, and superannuation businesses will move into an expanded business division, while the insurance business will move into the consumer division.
Westpac is also ducking out of the provision of personal financial advice by its own salaried financial advisers and authorised representatives, instead moving to a referral model and entering the sale agreement as part of the exit with Viridian.
The move to Viridian will involve 175 BT Financial Advice advisers, among other employees.
Mr Hartzer said exiting BTFG’s financial advice business reflects the changing external environment, including a trend by financial advisers to operate independently, or in smaller advisory groups.