Mr Le Tissier has worked his way up the ranks, starting as a trainee twenty years ago, later becoming ACCA and AAT qualified.
His promotion follows the recent appointment of Dan Collins to the tax team as EY Channel Islands expands its leadership team.
Mr Le Tissier said: “This is a fantastic new challenge and a great time to be taking the next step in my career with EY in the Channel Islands as we continue to grow the business and support local industry through regulatory and economic change.”
Andrew Dann, EY’s Channel Islands Managing Partner said: “Richard’s promotion is a testament to his significant achievements during the last few years. It is also a reflection of EY’s investment in our people and their long-term careers. His background in supporting clients through regulatory change will play a vital part in delivering our purpose of building a better working world for our clients, people and the local community.”