In a statement, Optus said the solution, called Optus Managed Fortinet SD-WAN would incorporate its expertise in managed service capabilities with Fortinet's security-driven networking approach.
Optus Business vice-president of Product Innovation Deon Liebenberg said: "We know that as more people work from home and enterprises rely on off-premise tech touch points, the cyber security risks go up.
"Together, Optus and Fortinet address this and other cyber threats with a secure SD-WAN that provides our customers with a cost-cutting, time-saving solution.
"Cyber attacks know no borders and working with Fortinet and our managed security service arm Trustwave, allows Optus to help digitally transforming Australian businesses leverage global-leading security technologies that are trusted by large enterprises around the world."
Jon McGettigan, regional director, Australia and New Zealand, Fortinet, said: "SD-WAN is rapidly gaining traction in the marketplace as organisations better understand how they can provide increased connectivity and control.
"Optus has significant experience in delivering transformational network technologies, including SD-WAN, to its customers. Fortinet is pleased to partner with Optus to deliver a secure SD-WAN solution to Optus customers that will help them achieve next-generation networking capabilities with unparalleled security."