He will depart next month, starting in a similar role with Barclays Wealth in October.
Peters also co-manages the Charles Stanley Collectives Portfolio Service, as well as being a Portfolio Adviser investment panellist,
He has been with the firm since 2007, having previously worked at Hewitt Associates.
Christopher Aldous, Charles Stanley's head of asset management, said: “We can confirm that Stephen Peters has decided to leave the business to pursue other business opportunities.
"Charles Stanley is grateful for his significant contribution to the firm over the past ten years and wishes him the very best for the future.”