"As we continue to rapidly expand our market presence and client base, his leadership will be instrumental in developing our capabilities to manage that growth effectively, adding value to Ryan and our clients.
"Ryan is committed to enhancing and expanding our service offerings in Australia, and the appointment of Jon in this role is a major step toward that goal. Clients can take comfort knowing that our Australian team has deep local knowledge backed by an industry-leading global platform."
Ryan chairman and CEO G. Brint Ryan said "We have invested heavily in our Australian operations over the last 12–18 months with the acquisition of two leading companies, gaining a number of strategic leaders and highly seasoned tax professionals.
"With his aptitude, knowledge, and experience in the industry, Mr Graham is the ideal choice for this role and well positioned to lead Ryan's Australian operations in this capacity."
Graham joined the company in 2020 as principal and COO of Ryan Australia, following the acquisition of Indirect Tax Solutions, where he worked as a tax specialist.
He previously worked in the tax practices of Deloitte Australia, Arthur Andersen and EY, after starting his career in the UK's HM Revenue and Customs.
"I am excited to take on this prestigious role and continue to evolve Ryan's Australian operations in the region," said Graham.
"Our comprehensive range of solutions and our growing team of experts are now better positioned than ever to meet the needs of our clients, providing the capabilities to help their businesses maximise the efficiency and effectiveness of their tax functions."