The recently-retired pair will join coach Darren Lehmann on the tour with current assistants Graeme Hick and David Saker both heading to India early to prepare for Australia's Test tour there in February-March.
"It's a fantastic opportunity for us to have ex-players of the calibre of Brad and Ryan on board for this tour and continue their involvement in Australian cricket," Lehmann said.
"Both these guys have worked hard on their coaching since leaving the game and thoroughly deserve their opportunity.
Australia and New Zealand play three one-dayers from January 30-February 5 in Auckland, Napier and Hamilton.
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