He was the founder of a wealthy family business in Ireland and of a generation of public-minded Shillingtons who contributed to Methodism's growth in Portadown and the wider Connexion. At the time of the Primitive Wesleyan Methodist division he chaired the 'Dungannon Committee' which ensured for the WMs legal control of Trust property. His son Thomas Averell Shillington (1800-1874) followed the tradition of connexional and public service. He was treasurer of the Chapel Fund and played a leading role in the founding of Wesley College, Dublin and Methodist College, Belfast. He served on the Senate of Queen's University, Belfast.