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Our Staff

Shannon D. Mullen, Ph.D





Shannon D. Mullen, Ph.D.

Shannon D. Mullen completed her Ph.D. in Psychology from The University of Tennessee in Knoxville, Tennessee.  Dr. Mullen is  a licensed psychologist in the state of Georgia.  Prior to her doctoral studies, Dr. Mullen completed a Master of Arts in Counseling at the University of New Orleans.  Dr. Mullen established Mosaic Psychological Services where she provides clinical and forensic services.





Mandy B. Mullen, LCSW








 Mandy B. Mullen, LCSW

Mandy B. Mullen is a Licensed Clinical Social Worker in both Georgia and Florida.  Ms. Mullen received a B.S. in Human Services and has a Masters of Social Work from Florida Gulf Coast University in Fort Myers, Florida.  Her current professional specialities are play therapy, trauma counseling, child and adolescent behavioral problems as well as marital therapy and relationship counseling.  Ms. Mullen is also certified in Trauma Focused Cognitive Behavioral Therapy (TF-CBT).  Ms. Mullen is also the System of Care Director and is responsible for ensuring the best patient experience for receiving services at Mosaic.





Destin Stewart Richardson, Ph.D





Destin N. Stewart, Ph.D.

Destin Stewart-Richardson completed her Ph.D in Psychology from the University of Tennessee in Knoxville, Tennessee. Dr. Stewart is a licensed Psychologist in Georgia.  Her professional interests include women's mental health, substance abuse, sexual addiction, psychological, neuropsychology, and psychoeducational assessment, trauma, forensics, and group therapy. Prior to her doctoral studies, she completed a master's degree in Psychology from Mississippi State University. Dr. Stewart has held clinical placements at university counseling centers, hospitals, and outpatient clinics. She completed a pre-doctoral clinical internship at the University of Florida Counseling and Wellness Center





David Valpuesta



David Valpuesta, MFT

David Valpuesta received his Master's of Science in Marriage and Family Therapy from Valdosta State University. Prior to obtaining his Master's degree, Mr. Valpuesta received his Bachelor of Science in Psychology from Florida State University. As a Marriage and Family Therapist, he understands that when people experience trauma or severe stressors, life may seem to unravel. It is his passion to help couples, families, and individuals experiencing martial or relational conflicts, adolescent behavioral problems, and bereavement issues.   







Linda Best







  Linda Best

Administrative Assistant







Lara Newborn





 Lara Newborn

 Intake Coordinator









Candace Strickland, BS

Testing Coordinator










Cassie, Therapy Dog

Cassie is a 10 year old, German Shephard.  She has been specifically trained as a therapy dog and attends some sessions as needed.  Cassie is loved by all the children who visit the office! When you come to the office Cassie might bark to say, "hello!"