Our Newark Team

Delaware Psychological Services is committed to serving the behavioral health needs of Children, Families

and Individuals. We take a multidisciplinary approach in our work with clients. Our team of experienced professionals come from the fields of psychiatry, social work, psychology, mental health and addictions counseling and work together to ensure client care is individually tailored to your unique needs.

Mattie L. Costill


Lisa Ritchie


Shaniqua Johnson-Pierce


Mattie is a Licensed Professional Counselor of Mental Health working with Delaware Psychological Services. I've been working in the field for 10 years and have experience with both inpatient and outpatient settings as well as school-based therapy.

I work mostly with individuals and families with experience in couples counseling, co-parenting, reunification therapy, depression, anxiety, trauma and grief along with extensive experience working with students with Special Education and mental health needs.

I utilize a holistic approach along with Cognitive Behavior Therapy and Mindfulness to get to know each of my clients as an individual so we can best figure out what will be helpful for you to start feeling better.

Lisa is a Licensed Professional Mental Health Counselor and a Licensed Chemical Dependency professional with 25 years of experience.  She has worked in many different levels of care including Inpatient, partial hospitalization, intensive out patient and outpatient.  Lisa utilizes motivational interviewing to assist clients in clarifying and then achieving their treatment goals. Lisa is passionate about treating process addictions and has success in helping people achieve balance in their lives again.  For those that are interested, meditation techniques can be included to assist with the management of various symptoms.  Lisa works with clients in a holistic way, encouraging and supporting clients in achieving their personal goals.  

Shaniqua Johnson-Pierce, LCSW is originally from Harlem, New York and takes a great interest in utilizing the performing arts to support healing complex trauma. Shaniqua earned a Master of Social Work degree from Temple University with a clinical specialization in working with children and families in 2012. In addition, Shaniqua also serves as an adjunct professor for Widener University’s Graduate Social Work department teaching family therapy and serving as the field liaison for students completing their clinical field practicums. Shaniqua is an energizing and passionate therapist (LCSW) whom enjoys providing counseling services to adults, children, couples, and families who struggle with grief, trauma, depression, anxiety, and firmly believes that people are capable of healing in various avenues of their lives. She has an extensive background in working with children and families in several different settings such as outpatient substance abuse programs, inner city school settings in Philadelphia and Delaware and an HIV clinic. Shaniqua takes a holistic approach to treatment that focuses on mindfulness, trauma informed care, and narrative therapy.

17021 Old Orchard Road

Suite 1

Lewes, DE 19958

262 Chapman Road, Bellevue Building, Suite 100, Newark, DE 19702

Call Us: 302-703-6332

Fax: 302-827-4856

  • w-facebook
  • Twitter Clean
  • w-googleplus


Proudly created with Wix.com