Ambrosi is head of communications and public affairs at Anchor, a not-for-profit provider of housing and care for elderly people.
He was previously vice-chair of the PRCA group, but has taken over the role of chairman from Bridget Hargreave, who has moved on to pursue freelance work.
Francis, a director at Claremont, will replace Ambrosi as vice-chairman of the group.
Both Ambrosi and Francis’ roles will see them chairing topical events and meetings and direct activities useful to people working in communications roles for charities. They will do this alongside their existing jobs.
Ambrosi said: "The PRCA charities group has become a fantastic way to swap ideas, network and hear from some of the most influential and forward-thinking people in the industry."