The announcement sees Mr Bowden take on responsibility for the day to day running of Quilter Investors and he will continue to report into CEO Paul Simpson.
The firm says the change will also allow Mr Simpson to take up the additional role of director of investments, working more closely with its 15-strong investment team.
Dean Bowden joined Skandia Investment Group in 2007 and has held several senior management positions as the business has transformed over the years.
In 2015 he was appointed Old Mutual Global Investors’ (OMGI) proposition and commercial director, before becoming chief commercial officer at Quilter Investors upon its formation last year.
Paul Simpson was appointed CEO of Old Mutual Wealth’s multi-asset business in September 2017, which then became Quilter Investors in 2018.
He joined Old Mutual in 2006 as co-manager of the European Statistical Arbitrage fund and Global Statistical Arbitrage fund, before being appointed OMGI’s head of alternatives in 2009.
Mr Simpson said: “The whole team has worked incredibly hard to make this year one to remember for Quilter Investors and Dean has been at the heart of this effort.
“He has also been instrumental in establishing the multi-asset arm of Quilter as a standalone business and bringing new products to market that genuinely serve customers’ needs.
“I am really looking forward to working even closer with him, and the investment team, as we look to execute on an ambitious growth strategy in 2020 and beyond.”
Mr Bowden said: “This last year has shown that Quilter Investors is well established to design and build investment solutions that deliver for advisers and their clients.
“I am excited at this new opportunity to take on the day to day running of operations and to work with Paul to continue growing the business.”