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State Officers


Sitaniel J. Wimbley, Executive Director

NAMI Mississippi welcomes Sitaniel J. Wimbley as its new Executive Director. In this role, Sitaniel will continue to work with the NAMI Mississippi Board of Directors, affiliates, community partners and sponsors to improve the lives of persons living with mental illness as well as their families.

Wimbley received her bachelor’s degree in business administration from the University of Southern Mississippi and went on to obtain her Master of Business Administration degree from the University of Phoenix in 2006. Wimbley is very knowledgeable of NAMI Mississippi; she has served as Account Manager, Walk Manager, Program Director and Interim Executive Director. Over the last three years, Wimbley has gained extensive knowledge of NAMI and the mental health system. In her learning journey, she has also networked and promoted NAMI Mississippi in many meetings to gain valuable allies along the way. Mrs. Wimbley is devoted to applying her skills, experience, and knowledge to help NAMI Mississippi continue to grow and stop the stigma of mental illness.

Prior to NAMI Mississippi, Wimbley spent years in the banking industry, but she knew that was not her intended calling. Today, she helps to promote mental wellness all over the state of Mississippi. Mrs. Wimbley specializes in helping individuals living with a mental illness to overcome the stigma associated with mental illness. She is no stranger to mental illness and the stigma surrounding it as she was born to a mother who lives with bipolar schizophrenia. She considers herself a proud symbol of her mother’s determination to overcome the stigma.

A native of Natchez, Sitaniel and her husband Jonathan reside in Brandon with their two daughters. In her spare time, she enjoys traveling, helping her daughters in various extracurricular activities, and actively learning to practice self-care.


Joy Amerson, Account Manager

Joy Brashears Amerson joined NAMI Mississippi as Account Manager in 2019. She graduated from Emory University with a Bachelor of Arts degree in history and from Millsaps College with a Master of Business Administration.  She has 20 years’ experience as an office manager working in her family’s businesses.

As Account Manager, Joy is responsible for the following duties: accounts payable, bimonthly payroll, distributing affiliate reports, membership processing, remitting payroll taxes, processing grant reimbursement request, assisting team members in NAMI Mississippi event planning and production, and attending weekly team meetings.

Joy is a professional actor who has appeared in numerous plays at New Stage Theatre and has been featured in movies and on TV. She also enjoys traveling and photography.


Kawanna Jenkins, Education Outreach Volunteer

Kawanna’s professional background includes working with Tyson Foods and The Coca-Cola Company for more than 20 years.

Kawanna has been volunteering with NAMI Mississippi for six years providing assistance to those in need of mental health resources and more. She compiles complete monthly reports to the Mississippi Department of Mental Health that update them on how the organization is meeting annual goals. She is also responsible for various administrative duties in the office.

Kawanna’s hobbies include caring for stray and feral animals, and doing pilates.



Kimberly Massey

Kimberly Massey, Program Marketing Specialist



Sylvionna Moten-Horton

Sylvionna Moten-Horton, Open Up Mississippi Marketing and Outreach Specialist

David Shumpert, Office Volunteer

David Shumpert is originally from Itawamba County, Mississippi. He was married for 26 years and fathered three beautiful children. David is currently on worker’s compensation and has agreed to volunteer at NAMI Mississippi through the Ascent Return to Work Program. David is completing a six-month alcoholic recovery program.  He has found that NAMI’s program pairs perfectly with the 12-step programs of Alcoholica Anonymous and Narcotics Anonymous. David is greatly honored to represent the struggle of suffering with both substance abuse and mental illness, also known as dual diagnosis. The awareness and importance of these issues will be a personal goal of his to bring to light - that there are resources available for anyone impacted by these unfortunate problems.

David answers the phones, checks messages, and sits at outreach tables for the State Office.  He also performs other tasks assigned by the office team.



young multiracial woman with dark hair wearing blue shirt and smiling with head tilted

Nicole Thomas, Marketing and Outreach Intern

Nicole Thomas, a native of Woodstock, Georgia, is technically an extern since she graduated from Piedmont College in 2020 with a bachelor's degree in mass communications. She wants to have a career in working for a nonprofit and is also interested in becoming a children's author. When asked why she cares about mental health education, she says, "As someone who lives with OCD and experiences anxiety, I know how important it is for people with mental illness(es) to get the treatment and support they need. I want to help people who are struggling with mental illness(es)." Nicole also enjoys writing, watching Hulu and Netflix, hanging out with friends, and being involved with her church.



Latasha Willis, Peer Community Outreach Specialist

Latasha A. Willis is a native of Jackson, Mississippi. She earned a Bachelor of Science degree in mathematics with an emphasis in computer science from Tougaloo College, an Associate of Science degree in graphic design from the Art Institute of Pittsburgh, and a Master of Fine Arts degree in media design from Full Sail University. She currently serves as a Community Engagement Specialist for NAMI Mississippi, where she is responsible for graphic design work, web development and social media management.

Latasha was diagnosed with anxiety disorder and depression in 1999, which led to her becoming a NAMI member in 2005. She was a NAMIWalks team captain for The Church Triumphant Global every year from 2007-2017. She became a NAMI Peer-to-Peer Leader in 2017 and a NAMI Peer-to-Peer State Trainer in 2018.

Latasha works as the social media web services coordinator for the Jackson/Hinds Library System, where she is responsible for graphic design work, web development and social media management in addition to press releases and media coverage of library programs.

Latasha is also an entrepreneur. She has operated her graphic design business, Reason to Live Studios, since 2005, and she is transitioning it into a graphic design consulting and education firm. She also owns an online store called The Spinster’s Shoppe, LLC, where she has been selling home décor, jewelry, accessories and more since 2014.


young Caucasian woman with reddish brown smiling with tilted head

Cara Willoughby, Program Development Intern

Cara Willoughby, a native of Madison, Mississippi, graduated from Mississippi State University in 2020 with a bachelor of science degree in psychology. She plans to spend a few years gaining experience in the mental health industry before attending graduate school to become a clinical mental health counselor and help individuals who have experienced trauma and abuse. When asked why she cares about mental health education, Cara says, “Because of my family history and personal experience with mental illness(es), the most important thing to me is helping people access mental health education and build skills to manage their own mental illness(es).” She also enjoys anything outdoors such as hiking and exploring nature,  reading, tending to her house plants, selling clothes online, photography, and digital illustration.

From Next Door To Across Mississippi

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