Advantage Leadership


Oliver J. Booker, Chief Executive Officer

Oliver "O. J." Booker came to Advantage in Athens as Chief Operating Officer in December 2011 after 25 years of experience in acute care hospital executive management.  A native of Warm Springs and Macon, GA, he holds a BS degree from Mercer University, MS in Biology from Auburn University, and an MBA and MHA from Georgia State University.  A person in long-term recovery, he is also a Certified Addiction Recovery Empowerment Specialist (“CARES”), graduating with the 9th cohort in 2012. 

O. J. assumed the CEO position in January, 2014 after the retirement of Cindy Darden, Ph.D.  He is married, has four children, and lives in Madison, GA.


Joan Quinn, Clinical Director









Joan Quinn became Clinical Director at Advantage in 2017 after serving as Program Manager for the Child & Adolescent (C&A) clinic since 2014.  In addition to managing the C&A clinic, Joan supervised the implementation and growth of numerous grant-based programs including the Georgia APEX Project for school-based counseling, Project Light - an Early Psychosis Intervention Collaborative (EPIC), and the Zero-Suicide Initiative.  Prior to arriving at Advantage, Joan had worked in Seattle and Massachusetts as a clinical supervisor and psychotherapist for nearly 15 years, serving both adults and children struggling with trauma, severe and persistent mental illness, and substance abuse.

Born in Ontario, Canada, Joan graduated with Bachelor of Art degrees in both philosophy and English from the University of Toronto.  Joan went on to earn a Master of Arts in Counseling Psychology, with a specialization in integrative health, from Lesley University in Cambridge, Massachusetts.  She is a Licensed Professional Counselor in the state of Georgia.

Joan’s focus moving forward is on growing a recovery-oriented system of care at Advantage that emphasizes equity and social justice.  She believes that the path to healing begins with a collaborative, understanding, and accepting therapeutic relationship which emphasizes best practices and evidence-based treatments.  When clients feel truly received, the door is opened toward living their best lives.

Joan lives in Athens with her husband. When she’s not pursuing her passion in service to others, Joan enjoys yoga and going sailing.

Janice T. Callaway, PhD, PharmD, Quality Assurance Director


Janice T. Callaway is a graduate of Mercer University School of Pharmacy and Health Sciences (Doctor of Pharmacy) and the University of Georgia (Masters and Doctor of Philosophy in Social Work). She has been associated with Advantage Behavioral Health Systems since 2000 in various capacities. Initially Dr. Callaway was a volunteer and contract clinical consultant to the COPE (Community Outreach, Prevention, and Education) program and the Global Arts and Skills recovery-oriented program. She became employed with the Advantage in 2003.

During her employment, Dr. Callaway has served as the organizational Risk Manager, Program Manager for C&A Clinic and School-Based programs, the organization's Utilization Management and Accreditation Manager for continuous quality improvement, the Director of Medical Services, and currently as the Director of Quality Assurance.

Alissa Darnell, Care Management Director





Alissa Darnell joined Advantage as the Director of Care Management in November, 2016. She is a Doctoral Candidate in Counselor Education and Supervision from Ohio University in Athens, Ohio and a Licensed Professional Counselor. Alissa has a passion for empowering people and serving her community. As a psychotherapist, she has worked with youth and adult populations in Community Service Board (CSB) and private practice settings. In recent years, she has worked as a Quality Assurance Manager, providing Evidence Based Trainings to staff and community partners, utilization management/review, and technical assistance to staff in a Georgia Community Service Board.

The Care Management Department provides support and oversight of clinical and business operations in Advantage’s outpatient clinics, specialty programs, and the Intellectual Developmental Disabilities program. This collaboration is designed to promote consistency in organizational processes, resulting in increased client care and staff satisfaction.

Alissa is married and has a one son. They enjoy learning about different cultures, traveling, and spending time with friends and family.

Kadesha Evans, Director of Medical Services





Dr. Kadesha Evans joined Advantage as the Director of Medical Services in February after transitioning from the Director of Nursing Position.  Evans will oversee all medical staff and assist with client care issues in our 10 county service region.  Dr. Evans is a graduate of St. Margaret’s School of Nursing in Pittsburgh, PA (RN Diploma), holds a Bachelor’s of Science in Nursing (BSN) from Slippery Rock University, and a Master’s of Science in Nursing Leadership (MSN) and Doctor of Nursing Practice (DNP) from Chatham University in Pittsburgh, PA.

Dr. Evans serves as the Vice President of the Chi Zeta chapter of Sigma Theta Tau International and is one of the founding members of a community organization in Athens, the Inclusive Health Council, geared towards reducing health disparities and creating health equity for our community’s LGBTQ population. She is also the Community Member on the Executive Committee of GLOBES at UGA.

Dr. Evans is originally from New Castle, PA and moved to Athens in 2015 where she lives with her partner (wife) and two dogs.


Evan Mills, Director of Business Development

Evan Mills came to Advantage to assist with diversifying Advantage’s financial portfolio through the pursuit of local, State, and Federal grant opportunities.  Prior to coming to Advantage, Evan worked for Athens-Clarke County government for 10 years administering federal grants to local nonprofit organizations and coordinating the continuum of care for homeless services within this region.  Evan holds two degrees from the University of Georgia, a Bachelor’s degree in Sociology and a Master’s in Social Work.

Evan is responsible for the initiation and development of grant supported programs as well as the ongoing grant management activities that support program design and evaluation of service delivery outcomes.  Evan sits on several local and State nonprofit boards whose missions coincide with the underlying foundation of Advantage’s purpose which is to provide support to those most in need.

Gail L. Smith, Director of Finance


Gail L. Smith joined Advantage as Senior Accountant in October 2016 and became Director of Finance in February, 2017.  She holds a Bachelor's of Business Administration from Georgia State University (1982), with an emphasis in Accounting.  Gail brings with her 30 years of experience in health care management, including 10 years with CSB services.

When away from Advantage, Gail enjoys family time with her 2 daughters and 3 amazing grandsons. Her favorite pastime is any activity related to her hobby farm - horseback riding, wrangling and chicken herding.  Gail was born, raised and resides today in Alto, GA.



Laurie Wilburn Bailey, Director of Clinical Business Development









Laurie Wilburn Bailey is a Licensed Professional Counselor with over 20 years of experience in Community Behavioral Health treatment and management. She holds Bachelor’s Degree in Psychology and a Master’s of Education Degree in Community Counseling-both from The University of Georgia. During her time with Advantage Laurie has served children, adolescent, and adult populations with mental illness and/or substance use disorders and has worked in community-based, clinic-based and crisis services. With a passion for clinical treatment, a commitment to this community, and a determination to fill gaps in service needs, Laurie quickly moved into roles that allowed her to develop community partnerships and create new programs. With the ever-changing tide of Behavioral Health Care, she has had many opportunities to pursue this interest. This new role will allow her to focus more time and energy to expand the services we provide to the community and those we serve.

Other responsibilities include clinical training in evidence-based practices and clinical supervision to interns and staff working toward licensure.

Laurie is a founding member and past-President of Athens Resource Center for the Homeless; served on the boards of Athens Homeless Property Corporation and Mental Health America-Northeast Georgia Chapter; and is a 2015 graduate of LEAD Athens. She is a former board member and current sustaining member of Junior League of Athens. Laurie served as Clinical Director of Advantage from 2007-2017, and she is excited to be able to move into her new role. She is married with one child and resides in Athens.

Anne Campbell, Director of Information Systems

Anne Campbell joined Advantage in October 2016 in a shared services business agreement with Avita Community Partners CSB as the Director of Information Systems.
Anne brings forward 20 years of experience with information systems administration, project management and leadership.

She has key responsibilities that include representation on Advantage Executive Team, leadership of MIS and Billing Departments, and all initiatives as related to the organization EHR System (CareLogic) Administration.

Anne enjoys vacations at St. George Island, shopping, spending time with friends/family and loves 80’s music.