Trinity sends two lay representatives to participate in decision making at the Niagara Presbytery, a governing body of the United Church that deals with local issues.
Representatives of 34 pastoral charges attend monthly meetings. Issues are wide range, including pastoral changes, property matters, support of church projects and governance.
Each representative sits on at least one Presbytery committee. They also cover a wide range, including Congregational Support, Christian Development, Missions, Pastoral Visitation Oversight and Parish Outreach Strategy. The Presbytery is also represented in the Brock Chaplaincy, the Caribbean Workers Outreach Project, and Cave Springs Camp.
News and decisions made by the Presbytery are reported back to Trinity Council through its representatives.