Reuben Casey has given notice of his resignation as Kathmandu brand CEO.
KMD Brands Group CEO Michael Daly praised his contribution to the brand in a statement.
"Reuben has been an integral part of Kathmandu in his time with the brand serving as CFO, COO prior to being appointed CEO," he said.
"He has built a strong brand leadership team and leaves Kathmandu well positioned for continuing growth. We wish Reuben all the very best.”
Casey said the brand is well-positioned to move forward and thanked the business.
"It's been a privilege being with Kathmandu for over 12 years and I thank all the team at Kathmandu and KMD brands.
"With such a passionate team culture, brand strength, desirable product offer and a blossoming international business, I have no doubt that Kathmandu will go from strength to strength.”
Michael Daly will act as interim Kathmandu CEO while options for a replacement are assessed in the weeks ahead.