JHAH was formed in 2013 by Saudi Aramco and Johns Hopkins Medicine to provide health services for Saudi Aramco employees and their dependents. Walsh joined JHAH as CEO in June 2020. Walsh has over 25 years of experience in healthcare leadership roles. He was previously CEO of Cabrini Health Australia, CEO of the NHS Strategic Health Authority for South East London in the U.K., and CEO of the Alfred in Melbourne, Australia.