Prince and Suzana Mathiasz received missionary appointment in May 1982 and arrived on the field in July 1983. During their first term, they spent much time getting the work started: holding evangelistic meetings, soul winning, outreach efforts, registering the church, and building and dedicating the first-ever UPC building (national headquarters church and office) in Sri Lanka.
They continue to establish the work, conduct many training seminars, buy more properties, and build new church facilities. They have opened a Bible college and have baptized many Trinitarian pastors and churches. They are developing a new national training center as well as a family camp project.