Trust Company managing director Jonathan Sweeney has resigned from the firm after 17-years.
"As a 45 year old, I decided I wanted to now do something different with my life. The company is in good shape and I believe it is now time for me to move on and see what other opportunities are out there," Sweeney said.
Sweeney's first role with Trust was in the funds management business. He took on the role as managing director eight years ago.
Since then, the company's market capitalisation has grown from $114 million to $275 million.
"Jonathan has led transformational change within the company," Trust chair Bruce Corlett said.
During his tenure as managing director he was involved with the firm's merger with Permanent Trustees in 2002, the securitisation joint venture with BNY Mellon, the establishment of Trust's property and infrastructure custody business and the company's expansion into Asia.
"My greatest achievement is taking a small insular company and bringing it into a more widely recognised listed entity. This will give the incoming chief executive a strong base to grow the business," Sweeney said.