Crisis Hotline Numbers:

Mental Health & Addictive Disorders


Developmental Disabilities


Executive Team Members

Dr. Monteic Sizer, Executive Director

Dr. Sizer serves as Executive Director for Northeast Delta Human Services Authority (Northeast Delta HSA). He joined the organization in May 2013. He is uniquely qualified to advocate on behalf of citizens in the 12 Northeast Delta HSA parishes he represents because he exemplifies how people can meet their greatest human potential based on accountability, integrity and a willingness to engage in their own lives.

His vision for transforming Northeast Delta HSA into an innovative entity has already begun with integration of previously disparate mental health, developmental disability and addictive disorder services. Under his leadership, Northeast Delta HSA is increasing efficiencies for improved clinical accessibility, centralized operations, organizational accountability and improved partner and provider relationships.

He has established three tenets for Northeast Delta HSA and its partners: to provide excellent customer service, greater access to services and competent, quality care.

Prior to this appointment, Dr. Sizer served as the President and CEO of the Louisiana Family Recovery Corps, a long-term disaster recovery organization created by the state of Louisiana after Hurricane Katrina. Additionally, Dr. Sizer has deep professional experience in organized philanthropy, politics, educational reform, and as a leader of several large health and human services organizations. This expertise further enables him to speak practically about relevant policies, procedures, and programs needed to help poor and vulnerable populations become successful.

Sizer is a 2010 Leadership Louisiana graduate, a Leadership Fellow with the Effective Leadership Program at the Center of Leadership and Public Values at Duke University and the College of Business at Southern University (Baton Rouge), and a Political Fellow and former member of the Board of Directors of the North Carolina Institute of Political Leadership.

Sizer earned a Ph.D. in Clinical-Community Psychology from the University of South Carolina. He completed his clinical residency at William S. Hall Psychiatric Institute. He holds Bachelor of Science (Summa Cum Laude) degrees in Psychology and Criminal Justice from Pfeiffer College, and an Associate degree in Applied Science from Central Piedmont Community College.


Martha Phillips, Clinical Services Director

Martha Phillips is the NE Delta HSA Clinical Services Director. In her role, she provides operational oversight to eight outpatient behavioral health clinics and four peer support centers. Martha's management responsibilities include clinical staff development, training, and quality of services monitoring. She is also helping to implement the NE Delta HSA behavioral and primary care integration initiative. Using evidence-based practices, Martha also examines, diagnoses and treats NE Delta HSA behavioral health clients. Before joining NE Delta HSA, she served as the Behavioral Health Unit Manager at University Health-Conway (UHC). She previously worked as a Registered Nurse at UHC for nearly 20 years. She has served as a pyschiatric field nurse for more than a decade, worked in child and adolescence mental health rehabilitation, geriatric and pyschiatric community healh and she has taught nursing at the university level.

Martha is a certified Family Psychiatric/Mental Health Nurse Practitioner, and Advanced Practice Registered Nurse and a Registered Nurse. She earned a Master's Degree in Psychiatric Nursing from the University of Louisiana, Lafayette and a Master's Degree in Nursing from Grambling State University. She earned a Bachelor of Science degree in Nursing from Grambling State University.

Jill Hirsekorn, Public Information Director

Jill Hirsekorn is the Northeast Delta HSA Public Information Director. She manages and coordinates communications and branding efforts to support Northeast Delta HSA’s delivery of mental health, developmental disabilities and addiction disorder services. Previously, Jill served as Communications Director of a state Medicaid project and as Corporate Communications Director for South Carolina Research Authority.

She earned a Bachelor of Science degree in Journalism from the University of Kansas.


Jennifer Purvis, Director of Developmental Disabilities

Jennifer Purvis is the Northeast Delta HSA Developmental Disabilities Administrator. Her responsibilities include oversight of the delivery of community-based services to persons with developmental disabilities in the Northeast Delta HSA service district. With more than 20 years of experience, Jennifer has worked directly with families and individuals to locate, plan, develop, and advocate for specialized services along with managing the operations of multiple state and federally funded developmental disabilities programs and services delivery systems. She has worked directly with individuals with developmental disabilities and their families through waiver services in private industry and in management roles.  Jennifer has completed instruction in the Person-Centered Planning Personal Outcomes Measurement System as developed by the Council on Quality and Leadership in Supports for People with Disabilities. She has also served on multiple panels and in focus groups throughout the region advocating for people with developmental disabilities.

Jennifer earned a Bachelor of Arts degree in psychology from the former Northeast Louisiana University now operating as the University of Louisiana of Monroe.


Demetrius Roberts, Director of Human Resources

Demetrius Roberts joined Northeast Delta HSA in November 2013 as the Human Resources Director. Demetrius administers and directs a comprehensive Human Resources Department for Northeast Delta HSA, which includes approximately 109 positions. Her responsibilities include the development, implementation, and interpretation of all human resource policies and procedures. Directly supervising and overseeing the administration functions in orientation/on-boarding processes, insurance processing, retirement services, grievances, discipline, Family Medical Leave (FMLA), Affirmative Action/EEO, Recruitment/Selection of personnel, and classification and pay programs. Demetrius is a former United States Army Captain and Human Resources Operations Commander. In addition to her officer ranking, she is also an Operation Iraqi Freedom Veteran.

She earned a Bachelor of Science Degree in Biology from Tuskegee University. Demetrius has 11 years of HR experience along with unwavering dedication to providing excellent customer service.


Avius Zimmerman, Director of Corporate Compliance

Avius Zimmerman is the Northeast Delta HSA Corporate Compliance Director. In this role, she ensures that NE Delta HSA meets compliance regulations with federal and state licensing boards and CARF accreditation standards. Prior to this position, she managed Research and Development and worked in public policy, grant development and contract management at NE Delta HSA. Avius has served as the region's strategic planning coordinator, where she built coalitions to address and change policies in regard to underage drinking. She is currently working to expand behavioral health services in Union Parish.

She earned a Bachelor of Arts degree from Louisiana Tech University and a Master of Arts degree from Grambling State University. She is a Doctoral candidate in Public Health at Jackson State University.


Carlton D. Holmes, Director of Finance

Carlton Holmes joined Northeast Delta HSA in July 2015. He serves as Chief Financial Officer and oversees and directs fiscal functions for the agency. Before joining Northeast Delta HSA, Carlton reviewed fiscal activity and provided technical assistance for the State of Louisiana Department of Health and Hospitals mental health and addictive disorder social service programs.

Carlton’s professional background includes extensive experience in governmental accounting, budget development, grant administration and financial reporting. He holds a Bachelor of Science degree in Accounting from McNeese State University in Lake Charles, Louisiana, and he has earned more than 36 semester hours in post-graduate studies in Public Finance, Public Budgeting, Accounting and Management Information Systems.