Harrison, who will also become a commissioner, currently serves as a senior partner at Ofgem, where she leads the Sustainable Development Division.
Prior to her time with Ofgem, where she previously held the roles of managing director of corporate affairs and communications director, she was the first chief executive of ICSTIS, the UK industry regulator for premium rate telephone services.
“Working with the staff, industry, stakeholders and partners in government, I welcome the opportunity to build on the strong foundations laid by the Commission over the last decade,” Harrison said.
UKGC chair Philip Graf added: “We are making significant progress in our aims to raise standards in the gambling industry, empower consumers to manage the risks of gambling and to build partnership and understanding of gambling issues.
“Sarah has a wealth of experience in regulation along with social and consumer policy and communications – she is well placed to lead the Commission into its second decade as the regulator of commercial gambling in Great Britain.”