A highly-respected member of the Australian IT retail industry, Gant was previously the director, Consumer Channel at Ingram Micro, which she grew into the largest retail distributor in Australia.
Gant has a proven track record for outstanding leadership, driving business growth and profitability, said Simms International.
Managing director, Danny Moore, said Simms will benefit enormously from Marlene's extensive experience, passion, professionalism and relationship management skills.
"We are delighted to have attracted someone of Marlene's calibre to head up our retail operation and really drive our vision to revolutionise the way the retail channel is supported in Australia," he said.
"Her decision to join Simms is a tremendous endorsement of our strength and positioning within the market, and our potential for future growth."
Not only will Gant begin working at Simms, but she will become a shareholder of the company and will take a seat on the Board later this year.
Moore said Gant shares his vision to deliver deep value for vendors and retail partners by applying innovative systems and processes to boost sales while minimising risk.