Asia Heartbeat
Phone: 719.332.8172
PO Box 6419 Colorado Springs
CO 80934-6419

Staff Profiles

William B. Greiser, MD - Executive Director and Co-Founder
Dr. William Greiser is a physician from the United States. He is a Fellow of the American College of Surgeons and practiced in the United States for 9 years prior to going into full-time medical mission work in 1997. Since then, he has served in over 20 different nations, however it was Myanmar that ultimately captured his heart. He lived in Myanmar for 10 years, but has since transitioned back to the US where he is working in Emergency Medicine and Hospice care while continuing his role with Asia Heartbeat. He currently serves as the Executive Director for Asia Heartbeat and is it's Senior Medical Consultant. He and his wife Ehdena and their daughters Avalyn, Isabella and Sophia presently reside in Lexington Kentucky.
Bentley Tate, MD - President and Co-Founder
Dr. Bentley Tate is a practicing Emergency Doctor who has been involved in missions since his medical training. After becoming a doctor he obtained a Master's of Divinity from Denver Seminary while working full-time as a doctor. He completed specialized training at the London School of Tropical Medicine in 1994. In 2000 he traveled to the country of Myanmar and quickly sensed he was to have a longer-term involvement there. He cofounded Asia Heartbeat with Dr Bill Greiser in 2003. He and his wife Sandra have four children and live in Denver, Colorado.
Machelle Kushnerick - Office Manager
Machelle Kushnerick has had a heart for missions, and particularly for suffering children, since she was very young. She has been on many short term trips in the U.S. and abroad. In 2003 she completed a year long internship with Teen Mania Ministries in east Texas. From 2008 until 2012 she and her husband ran a youth ministry through her home church in western Colorado. In 2012 they moved to Louisville, KY, with the intent of assisting with a church plant. Recognizing a deep need to seek further wisdom and lay stronger foundations for their family and their future, Machelle and her husband, Tom, recently moved to Colorado Springs, CO, where they now live with their 3 children.
Matt and Faith Perkins - Education Directors
Matthew Perkins is a teacher at Ambleside Colorado in Centennial, Colorado. After graduating from Indiana Wesleyan University in 2003, he moved to North Carolina, where he taught secondary English for ten years and earned his Master’s in Education. In 2013, he and his wife, Faith, felt called to move to Ohio, where Faith’s family lives. After working at a vocational high school for two years, the Lord opened doors for Matthew, Faith, and their four children to move to Colorado and teach at Ambleside, a Christian school founded on the Charlotte Mason teaching method. He believes strongly that the most effective education is one where the child is viewed as God’s child and is challenged to grow in his or her weaknesses. Faith Perkins has a heart for missions and for fostering relationships with people. She graduated with a degree in Early Childhood Education from Malone College and taught in North Carolina until she became a mother. She has been on multiple missions’ trips, which strengthened her desire to minister to those around the globe. She is excited to partner with Matt, using her skills in education to minister to the people in Myanmar, while taking care of their children Isaiah, Alexis, Audrey and Timothy.