Netwealth announced Zenith Investment Partners will manage its Elite Blend models on the Netwealth Super Accelerator and Wealth Accelerator services.
Zenith joint managing partner David Wright said he has seen a "rapid rise of interest in managed account portfolio solutions" and particular demand from advisers.
Netwealth joint managing director Matt Heine said: "Whilst our recent focus has certainly been geared towards the very strong growth of our private label relationships, it's important we continue to add new professional managers and options to our menu to ensure the range of options remain relevant to both advisers and clients".
"We are delighted to make the Zenith models available more broadly to our advisers and clients having worked closely with Zenith on delivering private label managed accounts to a number of boutique wealth management groups wanting to develop and implement a unique investment proposition for their clients," Heine said.
Netwealth plans to add further managers to its managed account service during the second half of the year as it continues to support increasing adviser demand.
It recently exceeded $15 billion in funds under management and administration (FUMA) following strong inflows and continued growth across non-institutional, private client and wealth management sectors.
Netwealth also announced it will rollout new private label managed accounts expected for completion between September and October.