Aviva Investors head of pan-European equities Mark Denham is to join Carmignac in a similar role after 13 years with the firm.
Mr Denham joined Aviva Investors in 2003 and looked after three European equity funds in his time.
He will join Carmignac in October as head of European equities and assume management of the Carmignac Grande Europe and Carmignac Euro-Patrimoine funds, which have around €418m (£321m) in assets.
A spokesman from Aviva Investors said: “We would like to thank Mark for his contribution since joining the company in 2003 and he leaves with our best wishes for the future.”
Edward Kevis will now takeover the £156m Aviva Investors European Equity fund, which Mr Denham managed since 2012.
Mr Kevis recently took over the €374m European Equity Income fund, which Mr Denham ran since 2013.
Head of European equities Frederic Tassin will now oversee the European teams in Paris and London.
Mr Denham’s departure comes amid other changes in Aviva Investors’ UK equity team.
Simon Young, who previously co-managed the £253m UK Equity fund has departed the company, and is replaced by UK head of equities, Trevor Green, alongside Chris Murphy.
James Balfour, who joined Aviva in 2012, has also been promoted to portfolio manager and has been appointed co-manager on £892m UK Equity Income fund, also alongside Mr Murphy.