Dr. Dyer is an ENT surgeon with 25+ years of experience in medical missions. In 2017, he felt God calling him to step away from his private ENT practice and launch HEARTFIRE - a new type of medical mission organization designed to make the Last commandment of Jesus (“Therefore, GO, and make disciples of all nations…” Matt 28:19) the First priority. Alongside many wonderful volunteers and team members, he continues to empower, equip and accelerate mission-minded young adults, medical professionals, and other Christ followers to run into the Great Harvest.

When he’s not working on HEARTFIRE projects, you’ll find him trail-running, reading, sampling his next donut, or his favorite: spending time with his extraordinary wife and two world-changing daughters.

Dr. Yoblonski is a pediatrician with a deep desire to see young people transformed and the Gospel to be taken to the nations through medical missions. She first came to HEARTFIRE in 2023 and uses her vast missions experience to strategize and coordinate the medical aspect of each HEARTFIRE mission trip.

When not at HEARTFIRE, you’ll probably find her at a coffee shop sipping on an iced latte or hanging out with her three canines.

Sarah has served with HEARTFIRE since the beginning of 2022. After jumping on a trip to the Yucatán as a volunteer, she knew she wanted to serve with HEARTFIRE in a deeper capacity. Sarah has worked as an RN for 15+ years and has worked with various mission organizations throughout her career.

She lives with her husband and 2 kids & loves to hike every chance she gets!