Ros Altmann will be a Tory peer if the Conservatives are elected to government.
The Prime Minister said she would sit “at the heart of government” as the minister with responsibility for financial consumer protection and financial education.
Dr Altmann, a pensions expert and campaigner, said: "Until now, my work has focused on policy, rather than politics, but I am excited to have the opportunity to be more directly involved. For too many years, consumer rights have played second fiddle to the interests of large financial firms, but the new pension freedoms show that the Conservatives have put the interests of British savers first and that is a real game-changer.
“I passionately believe the new pension reforms, trusting people with their own money, are an essential step to helping everyone make the most of their hard-earned savings.”
Mr Cameron said: “What we're doing is taking the country's leading expert on pensions, on savings, on financial education, Ros Altmann, and saying that if we're re-elected, she'll be at the heart of government,
“We want to create a real savings culture in our country for everybody. Not for the rich at the top, but for everybody who saves or has a pension.”
Dr Altmann, a former advisor to Tony Blair, has written ‘Expert View’ columns on pension advice for the JC.
A member of Kinloss United Synagogue, the mother-of-three is a patron of the the JLGB Jewish youth organisation with her husband Paul Richer.