Mah has served as group finance manager of Ainsworth since joining the business in 2007 and will now take on the role of CFO, replacing the long-serving Mark Ludski.
Ludski, who has held the role since 2000, will remain as company secretary to help ensure a smooth and seamless transition of the CFO position.
In addition, Ludski will undertake a number of additional initiatives to pursue opportunities to progress growth objectives and governance-related activities across the group.
“We congratulate Lynn on her appointment to the role of CFO; I am confident she has the necessary attributes to provide significant value to the group in her new role,” AGT chairman Danny Gladstone said.
“She is a highly competent and effective finance executive, and her skills are well suited to the opportunities ahead. We look forward to working with her in her expanded role.
“On behalf of the board I would also like to thank Mark and pay tribute to his significant and valuable contribution to Ainsworth over the last 22 years. We are delighted to retain his expertise and experience and look forward to continuing to work with him.”