AMP Capital's head of sector multi-manager will leave in July, after nearly 25 years with the company. : AMP Capital's head of sector multi-manager will leave in July, after nearly 25 years with the company. "Lydia made a strong contribution to AMP Capital over her 25 years of service. We wish her all the best for the future," the firm said. Serafim headed the eight-person multi-manager team and was the portfolio manager for some diversified fixed income funds. Her departure follows AMP Capital's multi-manager chief investment officer Debbie Alliston's resignation in May.