NBCRNA Leadership

John C. Preston, DNSc, CRNA, APRN, FAANA, FNAP, FAAN

John Preston was named NBCRNA Chief Executive Officer in April 2021 after six years as the NBCRNA Chief Credentialing Officer. John brings more than 36 years of experience in nursing and advanced practice nursing, of which 25 were spent leading nurse anesthesia education and professional development. Prior to joining the NBCRNA, John has served as the Associate Program Director at Rosalind Franklin University, the Graduate Program Director for the University of Tennessee, and the Senior Director of Education and Professional Development at the American Association of Nurse Anesthetists. 

Leah Cannon, CPA, CAE, SHRM-CP 

Leah Cannon joined the NBCRNA in May 2011 after consulting with NBCRNA for two years. In her current role, Leah oversees finance, human resources and office operations. Leah has over 17 years of experience working with nonprofit organizations and has also worked in public accounting and private industry.

Christopher Gill, PhD, MBA, CRNA, ICE-CCP, CAE, FACHE

Chris Gill joined the NBCRNA in 2021 and serves as Chief Credentialing Officer with responsibility for credentialing, communications, and CRNA engagement. His focus is on protecting the value of CRNA certification, communicating clearly, and making sure certificant voices and perspectives are heard and reflected in how the organization works. Chris brings experience from across anesthesia practice and leadership, including Chief CRNA and regional leadership roles with North American Partners in Anesthesia. He continues to practice clinically in Chicago, which helps him stay connected to the profession and the evolving needs of CRNAs.

Tim Muckle, PhD, ICE-CCP

Tim Muckle serves as NBCRNA’s Chief Assessment Officer, overseeing assessment development, psychometrics, and research supporting its certification and continuing certification programs. His work focuses on maintaining rigorous, fair assessments and evaluating innovations that support lifelong learning and professional competence.

Tim previously served as NBCRNA’s Senior Director of Testing and as Senior Director, Psychometrics and Testing, at the Board of Pharmacy Specialties. He has published extensively on assessment and credentialing and regularly presents at national professional meetings. He holds a PhD in Educational Psychology, with a specialization in measurement, from the University of Illinois Chicago.