Invesco PowerShares Emea head Bryon Lake has left the ETF provider after 11 years with the firm.
Mr Lake, who took over as Emea head four years ago, has departed to pursue another opportunity, according to the firm.
He will be replaced on an interim basis by the firm's chief operating officer, Matthieu Grosclaude.
Mr Grosclaude said: "Bryon Lake has decided that the time is now right for him personally to pursue his career elsewhere and I would like to thank him for his contribution to Invesco and wish him the very best for his future."
The firm said it would announce further senior appointments in due course, while continuing to launch additional smart beta ETFs in both the equity and fixed income arenas.
Last year the firm launched an ETF targeting high yield stocks that had recently been downgraded. The 'fallen angel' product launch came after the firm poached Jim Goldie from passive rival Vanguard as head of ETF capital markets.