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Learn more about the exceptional volunteer community at HIS and how your experiences and talents can benefit our organization.

Staff, Board & Volunteers

Our Directors

SylviaSylvia Daining, President
Sylvia Daining began her work at HIS in 2003 after working for many years at Wedgwood Christian Services. She graduated from Calvin College with a Sociology degree and completed a Masters in Public Administration from Western Michigan University. She is a member of Madison Square Christian Reformed Church.

LauraLaura VanderMolen, DO - Medical Director
Dr. Laura VanderMolen has been with HIS since September 2001 after returning from medical mission work in Peru. As the only physician on staff, Laura serves as the primary doctor for many of our patients and recruits and provides oversight for the volunteer physicians and nurses at the clinic. Laura was raised in Baltimore Maryland and attended Hope College in Holland, Michigan.

After receiving her medical degree from Kirkville College of Osteopathic Medicine she completed her residency in Grand Rapids. She is board certified in Pediatrics and Internal Medicine.

Laura and her husband Kirk are the parents of four children and attend Madison Square Christian Reformed Church.

Dr. JohnJohn VanderKolk, DDS - Dental Director
Dr. John VanderKolk served on the HIS dental committee in its early days and took leadership of the newly established dental program in 2006. John's mission includes advocating for dental care in the community and serving the dental needs of HIS patients and others. John was raised in Grand Rapids and graduated from Hope College and the University of Michigan.

He owned a solo practice for seven years before becoming full partner in Partners in Dental Care for eleven years.

John and his wife Rosa are parents of four children. They are active in church life and committed to missions in West Michigan and Africa.

Our Dedicated Team


Daniel Armstrong, DDS - Dentist
Davita Bell - Dental Assistant
Sandra Deters- RDH
Barb Drenth, R.N. - Clinical Nurse
Monserrat Dykema - Receptionist
Thressa Hoekstra - Administrative Assistant
Astrid Rozo-Rivera, FNP-C, LCCE, CLC - Nurse Practitioner
Maria Romo - Medical Assistant
Mirta Saucedo - Dental Assistant
Lynette Schreur, R.N. - Nurse Clinic Coordinator
Karem Trevino - Medical Assistant
Rev. Ken Vanderwal - Spiritual Care

Board of Directors

Peter Lozicki - Chairman
Brian Fleetham - Vice Chair
Joe Valicevic - Secretary
Ray Fuller, MD - Member at Large
Sergio Cira-Reyes
Laura Finelli
Janna Jolman, RN
Jim Samuelson, MD
Dianne Slager
Peter Zwier

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