Neill joins the discretionary investment management provider from Newton Investment Management where he worked for 12 years.
During his time there he managed investments for families, private clients, charities and pension funds, with £240 AUM under his care
Prior to Newton Neill was at Lincoln Investment Management where he was a small companies investment manager.
Head of investment in London and Neill’s direct report, Richard Smeeton, said: "James is Rathbones’ fifth appointment this year, reflecting the ambitions of the company and also its attractiveness as a place to work. He has an impressive track record in investment management and we are pleased to welcome him to our team."