Mr Karrasch returns to OneVue after serving as head of group sales for OneVue between 2008 and 2014.
In the interim, Mr Karrasch has held consulting roles at Aurora Funds Management and Philo Capital Advisers.
OneVue managing director Connie Mckeage said she was "delighted" to have Mr Karrasch rejoin the business.
"His passion for independent advice, expertise in managed accounts and his deep knowledge of OneVue and our clients will be vital in expanding our product, sales and service delivery this year," Ms Mckeage said.
Prior to 2008, Mr Karrasch held sales roles at Macquarie Bank and Rothschild Australia Asset Management, as well as stockbroking positions at Eric J Morgan & Co and AC Goode & Co.
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