Senior Staff

    Shannon O. Large, DNP, APRN, ANP-BC, CARN-AP
    (Ext. 135 • email: 

    Dr. Shannon O. Large, DNP, APRN, ANP-BC, CARN-AP, IPNs CEO, has areas of expertise including alcohol and substance use-related conditions, forensic drug testing, primary care, and the assessment and treatment of impaired professionals. She previously worked at the University of Florida in inpatient dual diagnosis substance and psychiatric treatment and partial hospitalization care settings for 11 years prior to joining IPN.

    Dr. Large received her Doctor of Nursing Practice degree in 2013 from University of Florida and is an American Nurses Credential Center, Board Certified Adult Nurse Practitioner. She also is certified by the Addictions Nursing Certification Board as a Certified Addictions Registered Nurse in Advanced Practice. She is a member of the International Nurses Society on Addictions, serving as a Director at Large on the Board of Directors.

    Additionally, Dr. Large is a member of the Florida Nurses Association (FNA), American Nurses Association (ANA), Florida Nurse Practitioner Network (FNPN), and is active in the Florida Quality and Unity in Nursing (QUIN) organization.

    Myrtle Greene, LMHC, CAP, ICADC
    (Ext. 147 • email:

    Myrtle Greene, serves as the Chief Operating Officer (COO) at the Florida Intervention Project for Nurses (IPN). She is a Licensed Mental Health Counselor (LMHC), Certified Addiction Professional (CAP) as well as an International Certified Addiction Counselor (ICADC).

    Myrtle regularly provides workshops and trainings on “Workplace Impairment” to healthcare and nursing organizations and has authored professional publications on addiction in healthcare settings.
    She has a Master of Arts in Counseling Psychology, a Master in Rehabilitation Counseling and currently is pursuing her doctoral degree in Psychology. Her current research focuses on effectiveness of training tools to improve competency when addressing impairment in the workplace. Myrtle currently serves on the Board of Directors for the National Organization of Alternative Programs (NOAP). She is a member of the Florida Quality and Unity in Nursing Council (QUIN), American Psychological Association (APA), National Alliance on Mental Illness (NAMI) and the Florida Mental Health Association (FMHA)

    John C. Tanner, D.O. DipABAM, FASAM, CCFC, MRO
    (ext. 149)

    Dr. John C. Tanner,is one of the inaugural physicians certified by both the American Society of Addiction Medicine (1986) and the American Board of Addiction Medicine (2009), in addition to being a Clinically Certified Forensic Counselor. Dr. Tanner has worked in the addictions field since 1984 and previously served as Assistant Medical Director of the Florida PRN program. He serves on the Board of ASAM and remains actively involved in treating impaired professionals. IPN is very pleased to have Dr. Tanner on staff for his expert consultation, review of complex cases and best practices education.

    Linda L. Smith, RN, M.Div, CARN-AP

    Linda L. Smith, currently IPN/DOH Consultant and former Chief Executive Officer since 1988 when IPN was a newly forming Alternative to Discipline Program. For more than 20 years, as an advanced nurse practitioner specializing in addiction and mental health, Linda worked with her team to transform IPN into a comprehensive and sophisticated national model. Addressing consumer safety, nurse assistance and job retention is the primary focus of the IPN. A model used by more than a dozen other states that have developed state-wide programs, Linda is called on as a speaker and consultant for her expertise and experience with the Florida Program.

    In addition, Linda has published in many peer reviewed journals and authored two Recovery Maintenance Workbooks for Nurses which address issues specific to relapse prevention among nurses.


The mission of IPN is to ensure public health and safety by providing education, monitoring, and support to nurses in the State of Florida