The head of sales and marketing at BT Investment Management resigned after about three years with the firm.
BTIM said Chris Clayton made the decision to resign for personal reasons. He lives in Brisbane with his family and has made the weekly commute to Sydney for many years across several roles.
In a statement BTIM said Chris made a significant contribution to the business and "has provided exceptional leadership and support to the sales and marketing team."
"He has also been an integral part of the Australian executive team and a respected colleague throughout his time at BTIM. Chris leaves on a high with a strong team in place with a strong focus on client service," BTIM said.
BTIM Australia chief executive Michael Bargholz said: "Personally, in the short time that I have worked with Chris, I have been impressed by his breadth of knowledge across the different Australian market segments. I have observed his authenticity, integrity and dedication to the job."
"In order to continue this positive momentum, I will take on Chris' role in the interim and in so doing, have the opportunity to more directly know our valued clients and understand more intimately how to better serve them."
In support of this approach, and to ensure a smooth transition, Chris will remain with the company until his resignation becomes effective on 31 May.
BTIM has about $87 billion in funds under management as at 31 December 2016. It has operations in Australia, United Kingdom, Europe, Asia and the United States. It offers more than 50 investment strategies including equities, diversified, property, cash and fixed income products.