Our CTS Guiding Team
Dr. Jennifer Harrington, DMS, PA-C, DFAAPAÂ
Founder & board advisor
Dr. Jennifer Harrington’s passion for medical missions was inspired by missionary pioneers like Amy Carmichael and Albert Schweitzer, leading her to participate in mission trips to Malaysia and Papua New Guinea during her undergraduate studies at Grove City College. After completing her Physician Assistant (PA) certification, she devoted her early clinical career to serving an economically depressed community in rural Appalachia before transitioning into PA education to mentor future healthcare providers.
Driven by Christ’s call to servant leadership (Mark 10:45), Dr. Harrington has led more than a dozen medical teams to Peru and Guatemala and established mission partnerships across Honduras, Nicaragua, and Haiti. In 2023, she formalized this vision by founding Called to Serve as an official non-profit organization.
To date, Dr. Harrington has mobilized over 150 medical providers and students to deliver care to more than 15,000 patients in underserved regions worldwide. She views medicine as a bridge to share the love and Gospel of Jesus Christ, remaining dedicated to equipping healthcare workers to use their clinical gifts as His hands and feet around the globe.
Magan Grigg, MMsc, PA-C
Board member & trip leader
Magan Grigg is a certified Physician Assistant who graduated from LMU-DCOM PA school in 2014. Her passion for medical missions began in 2013 when she traveled to Haiti during PA school. Since then, she has participated in multiple medical mission trips, including serving as a team leader with Called to Serve. Magan believes God has called her to use her medical training to serve others and has developed a deep love for the people of Peru. She lives in Arkansas with her family and hopes to continue serving in missions while inspiring her family and the next generation of healthcare providers to share in this calling.
Dr. William McCrary, DMS, PA-C
Board member & financial stewardship
William "Brad" McCrary is a physician assistant and the Director of Didactic Education for the Physician Assistant Studies Program at Middle Tennessee State University. He has been involved with Called to Serve since 2023, participating in multiple medical mission trips throughout Central and South America.
Brad has a passion for teaching and enjoys helping others develop their clinical skills, with particular interests in point-of-care ultrasound, anatomy, and medical ethics. He especially enjoys opportunities to combine education with service, sharing knowledge and learning from the communities and healthcare professionals he works alongside. Outside of medicine, Brad serves on the board of Bravo Boro, a local community theater organization. He also enjoys hiking, kayaking, and traveling.
Peter Van Beurden, MS, PA-C
Board Member & communications
Peter is a bilingual, board-certified Physician Associate who graduated from A.T. Still University's Central Coast Physician Assistant Program (ATSU CCPA) in 2026. He works as a FQHC Primary Care PA in Santa Maria, CA. Peter has participated in two Called to Serve medical mission trips, serving in Peru 25' and Guatemala 26' as a didactic and clinical year student at ATSU. He is passionate about sharing the love of Christ through compassionate medical care, recognizing the opportunity to care for both the physical and spiritual needs of others.Â
Upcoming 2027 Trip Leaders
PA Magan Grigg
spring Trip Leader - Peru march 2027
PA Jennifer Harrington
PA Joy Henderson
Summer trip leader, peru june 2027
Summer trip leader, peru june 2027