Meet Our Staff
 Mark Janack, RN, RNFA
Office Administrator
Registered Nurse, First Assistant
Mark began working the Collis Group in 1982 as a neurosurgical nurse. Since then he has worked in various clinical and administrative capacities. Currently, he is responsible for office administration and business development.
Medical Training
Diploma in Nursing
St. Lawrence Psychiatric Center School of Nursing
St. Lawrence University
Ogdensburg, New York
RN First Assistant Program
Gateway Community College
Phoenix, Arizona
Certifications/Accreditations
 Registered Nurse, Ohio
Registered Nurse First Assistant, Ohio
Kurt R. Buchholz, PA-C, RN | Androniki Christides, MS, PT | Steven Crabtree, RN, RNFA | Nancy Halkerston, RN | Shaun M. Ortega, PA-C | Lee R. Quisenberry, CSA, CST |
Mark Janack, RNFA | Marie Zahn
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