The Headmaster, Mr Gareth Leechman MA M.Ed, came to Arndell in 2010, having served previously as Headmaster at Clarence Valley Anglican School, Grafton. Before becoming Headmaster at Clarence Valley, Mr Leechman had been Head of History, and Head of House at Shore. 

Mr Leechman brings to his Headship at Arndell a determination to continue and further develop the high academic standards of Arndell, its strong Christian character, and its fine traditions in music and pastoral care. He and his family live and attend church locally; they are committed members of the community who value the opportunity of serving in the Hawkesbury region.