With more than thirty years of pastoral ministry experience, Ron has taught extensively on Bible prophecy, deception and discernment, Israel and the Church, leadership, evangelism, and Biblical archaeology.

In 1987, Ron worked as a management consultant for IBM Corporation’s Federal Systems Division on aerospace projects for the U.S. military and NASA while serving as senior pastor of Calvary Chapel in Owego, New York.

In 1991, IBM relocated him to Portsmouth, England, for a senior management role on an aerospace contract with the British Ministry of Defense. Over the next sixteen years, his career expanded to include work with Computer Sciences Corporation, Lockheed Martin Corporation, and BAE Systems as he continued pastoring Calvary Chapel Portsmouth.

In 1992, Ron established a lasting ministry partnership with his friend Chuck Missler. This partnership led Ron and his family to move to the Koinonia House Trust headquarters in New Zealand in 2012, where, in 2015, he became President and CEO of Koinonia House Trust (NZ), Koinonia House, Inc. (US), and Koinonia Institute. After Missler's death in 2018, he relocated Koinonia House’s headquarters to Cocoa, Florida, in 2024, and he oversaw K-House Publishing and the online Bible school Koinonia Institute.