The Association of MBAs (AMBA) is a global MBA-focused accreditation organization and a worldwide MBA alumni club, founded in London in 1967. AMBA accredits around 2% of the world's business schools. All MBA students and alumni of the 238 accredited schools join AMBA as individual members free of charge. AMBA's long-serving president is Sir Paul Judge, the founding benefactor of Cambridge Judge Business School. The AMBA Chief Executive is Andrew Main Wilson, who joined the Association in August 2013. Chairman of the AMBA Board of Trustees is Len Jones, elected in September 2014.