Lindsay starts his tenure on August 14 as head of technology for Citibank Consumer Bank, sources told ZDNet Australia.
Late yesterday, a spokesperson for Citibank confirmed the appointment in an e-mail.
When Lindsay severed ties with Aussie in June, the mortgage specialist claimed he had left to pursue some of his own business ideas.
According to Citibank's Web site, in Australia, the group has over one million consumer customers across its various brands, including Diners Club Australia and Smith Barney. Citibank is just one part of the larger Citigroup financial services organisation.
The bank is expected to formally announce the appointment soon.
Lindsay's move comes to light just days after it was revealed ANZ Bank CIO Mark Willis had left the company, leaving another of Australia's top technology seats vacant. The bank is currently seeking a replacement, with both internal and external candidates being examined.