She started in the role in July 2023.
Ms Dixon said she was "extremely proud" of what was achieved during her tenure.
"The hub is an incredible farm and our new demonstration focus means we can get meaningful insights to our farmers in real time."
Working with DairyNZ, Southern Dairy Development Trust and Bioeconomy Science Institute had been a privilege, she said.
"It’s the southern farmers who make this job special. Knowing the work we do at the hub provides farmers with critical information, making a real contribution to their farm’s prosperity, has been a driving force for me."
Trust board chairman Simon Flood said Ms Dixon had been a wonderful general manager, keeping the ship steady as the board updated its strategy and pivoted to a demonstration mode.
"We will miss Andrea’s passion, leadership and strategic thinking, and thank her for her contribution and wish her every success as she starts a new chapter in her life. We are indebted to her for her commitment and dedication for the hub, and I cannot speak highly enough about Andrea’s capability and can-do attitude".
Recruitment for a general manager would start early next year, Mr Flood said.
The role was was unique and had a clear mandate to support southern farmers as they strive to improve their sustainability, productivity and profitability in a rapidly moving environment, Mr Flood said.
Before working at the hub, Ms Dixon was the lower South Island territory manager at the Livestock Improvement Corporation for seven years — Allied Media
