Sue Sharp will be working to give the society a voice in Westminster, Whitehall, City Hall and across the London boroughs, as cuts to budgets and services affect the lives of blind and partially sighted people in London.
She joins the society, which offers education, training and employment services, at the end of next month.
Royal London chief executive Tom Pey said: 'The disturbing reality is that more than 90 per cent of blind and partially sighted people who lost their sight in youth have never worked for more than six months in their lives.
'Sue will be representing their interests to Westminster and Whitehall.'
Sharp has spent the past four years working on behalf of blind and partially sighted people across the UK, including guide dog owners.