Columbia Leadership

Tina ArnoldTina Arnold,


Director of Nursing

Ms. Arnold has been employed by Landmark since 2010. In 2010, she began as a staff RN and later served as a charge nurse. Based on her experience and leadership qualities, Tina was promoted to Director of Nursing in 2010. She has guided the clinical programs here in Columbia with her attributes of employee engagement and hands-on leadership style.

Ms. Arnold has worked as a Registered Nurse for 15 years and prior to that as a Licensed Practical Nurse for 4 years. Tina served as Chief Nursing Officer for Callaway County Community Hospital prior to joining the team at Landmark. The coordination of high-quality critical care delivery is a passion of Ms. Arnold, and she shows that passion daily.

Ms. Arnold has been in healthcare for the last nineteen years and tackles the challenge of today’s healthcare environment head on. Directing patient care in her current role gives her the opportunity to provide quality care to all patients through those she manages. She looks forward to her future with Landmark Hospital of Columbia and the challenges ahead.

Adam ClapperAdam Clapper,


Administrative Chief of Staff

Dr. Clapper graduated from the University of Missouri-Columbia School of Medicine in 2002. He completed a residency in Anatomic and Clinical Pathology at the University of Iowa in Iowa City, IA and a fellowship in Surgical and Medical Pathology at the Mayo Clinic in Rochester, Minnesota. Dr. Clapper is board certified in Anatomic and Clinical Pathology and a fellow of the American Society for Clinical Pathology. He began his employment with Boyce and Bynum in June 2008 and currently oversees the division of Anatomic Pathology at Boone Hospital Center. He also has a teaching appointment in the Department of Pathology at the University of Missouri-Columbia and sits on the Board of Governors for the Missouri Medical Alumni Association. Dr. Clapper has been a member of the Medical Executive Committee at Landmark Hospital since its opening.