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Senior Leadership

Heather Matthews

Heather Matthews

Executive Director

Heather has over 25 years of professional leadership experience in Intellectual and Developmental Disabilities, Behavioral Health, and Federal Government contracting. Heather comes from Volunteers of America Southeast Louisiana, where she was the Director of Waiver Programs for individuals across the region. She also worked for the Louisiana Department of Health at the Developmental Neuropsychiatric Program, delivering care to this population with the most critical needs. Since 2018, she has served on the board of the Community Provider Association, an organization that promotes optimal funding, program integrity, and public policy at the state level for IDD Service Providers.

Heather’s love for the work runs deep. She has two siblings with disabilities. So even as a child, she was drawn to the cause of fighting for dignity and inclusion for all people. As the executive director, Heather plans to deliver the highest quality services to the people of our community and expand our services so all people have the support and opportunities to live to their fullest potential.
Heather Matthews holds a Master of Social Work Degree from Louisiana State University, is a Licensed Clinical Social Worker, and is a Board Approved Clinical Supervisor. In addition, she earned a Bachelor’s in Psychology from the University of North Carolina, Chapel Hill. She studied abroad, solidifying her love of travel. Heather lives at home in New Orleans with her two children and husband.
Sundeep Achreja

Sundeep Achreja

Sr. Director of Finance


Sundeep Achreja earned a Master of Business Administration with a concentration in Management Information Systems and a Bachelors in Accounting from the University of New Orleans. Sundeep has worked in Accounting at the Arc of Greater New Orleans for over two decades and states that he understands that ensuring the organization’s fiscal acuity is his “gift of service.” Sundeep is passionate about the Arc of Greater New Orleans’ programs and states that he is “happy” that his work serves to enrich the lives of the individuals with Intellectual/Developmental Disabilities.  

Sherrana McGee-Stemley

Sherrana McGee-Stemley

Sr. Director of Operations


Sherrana, has over twenty years of experience in the field of Social Service, Business Administration, Social Enterprise, Nonprofit Management and Direct Service Provision. As the Senior Director of Operations, Mrs. McGee-Stemley will oversee Workforce Development, Social Enterprise (i.e., MGRC, Grounds, Janitorial, etc.), Transportation and Facilities Maintenance.

Brianna Rock

Brianna Rock

Sr. Director of Programs and Services

504- 324-1701

Brianna Rock, LMSW, MPH is a licensed social worker and public health professional. Brianna earned graduate degrees in Social Work and Public Health from Tulane University. Brianna has adept experience in the fields of Mental Health, Social Service, and Juvenile Restorative Justice in the public and private sector. Brianna states that this diverse experience has honed her clinical aptitude and given her greater breadth to develop programs and services for vulnerable and marginalized populations.  

Brianna states that those she serves are the experts to their own “greatest yet to be” and that “each day” she “welcomes the opportunity to interact with and learn from our members.” 

Arleaser Simmons

Arleaser Simmons

Sr. Director of Human Resources


Arleaser Simmons is a seasoned result-oriented Senior Human Resources professional with over 20 years of experience in the HR industry. Arleaser strives to bring an innovative approach to human resources while creating a team driven environment that fosters room for development and growth.  

Arleaser, a native Floridian, member of the Society of Human Resources Management and graduate of Bethune Cookman University states her “greatest achievement in life is being a wife and a mother of two children” and “being of service.” 

Todd Simmons

Todd Simmons

Sr. Director of Development


Todd Simmons joined The ArcGNO in September 2023 bringing with him over 25 years of experience as an administrator, with expertise in marketing, public relations, business development, strategic planning, operations, finance, and outreach.

Todd graduated with honors with his Bachelor of Music degree from Cameron University in Lawton, Oklahoma, and received a Master’s in Business Administration from San Diego State University.


925 Labarre Rd
Metairie, LA 70001



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