Lady Judge, is a trained commercial lawyer with both British and American citizenship. She was appointed a Director of the United Kingdom Atomic Energy Authority in 2002 and became its Chairman in 2004, reappointed in 2007.  In 2010, upon completion of her two terms, she was then appointed as Chairman of the UK Pension Protection Fund. Lady Judge is a member of the UK Nuclear Development Forum, the UAE Advisory Board for the Development of Peaceful Nuclear Energy and Chairman of the Energy Institute of University College London.

Lady Judge is a non-executive director of Statoil ASA (Norway), NV Bekaert SA (Belgium) and Magna International Inc (Canada).  Previously she was Deputy Chairman of the UK Financial Reporting Council as well as a Public Member of the International Ethics Standards Board for Accountants, among others.

In November 2010 Lady Judge was appointed by the Prime Minister as a Business Ambassador for the UK. She is also Chairman of the International Advisory Board of SOAS and its London Middle East Institute.  She was the first woman member of the Board of Overseers of the Wharton School of Management and is currently a member of its Executive Board for Europe, Middle East and Africa. In 1980 she was appointed by the President as a Commissioner of the US Securities and Exchange Commission. Thereafter she was appointed as the first woman executive director of both Samuel Montagu and subsequently News International, among others.

In June 2010 she was awarded Commander of the British Empire in the Queen's Birthday Honours for services to the nuclear and financial services industries. Lady Judge received a B.A. from the University of Pennsylvania and Juris Doctor with honours from New York University Law School.