Inspired by the Seventh-day Adventist Clinic on Guam, Tmetuchl funded the transformation of a building into a similar clinic. The clinic, located in the Ngerbeched hamlet of Koror, opened on May 26, 1991. In 1997, he led a construction project that built a Sabbath School building adjacent to the Seventh-day Adventist Church. His net worth during this year was estimated to be over $30 million. The next year he donated some of his land and money for the construction of a new Seventh-day Adventist Church in Ngchesar. He died in 1999 while the church was still under construction.
