Meet Your Student Services Staff


Maria Luisa Ceballos

Substance Abuse Counselor


Maria Luisa Ceballos is a Licensed Professional Counselor and a Certified Substance Abuse Counselor. She received her Bachelor of Arts degree in Psychology from the Sacred Heart University in Lima-Peru. Additionally, she received her Master’s degree in Community Counseling from Trinity University in 1998 and completed a Post Master’s Program at George Mason University in 2007. Prior to joining Washington-Liberty as the School Substance Abuse Counselor, Ms. Ceballos worked as a Child and Family Therapist at the Arlington Department of Human Services where she provided mental health and substance abuse treatment services for thirteen years. Ms. Ceballos is fluent in English and Spanish.

Tamika George photo

Tamika George
Attendance Specialist

Tamika George is a Licensed Master social worker who received her Bachelor’s degree in Sociology from Howard University in Washington D.C. She then received her Masters degree in child and family social work from Walden University. Prior to taking on the role as Washington Liberty’s Attendance Specialist Ms. George worked as a Nephrology social worker for Fresenius Kidney Care in Fairfax, Virginia. Ms. George enjoys reading, traveling, and spending lots of time with family and friends.
Colleen Greenwood

Colleen Greenwood

Social Worker

Colleen Greenwood has been with Arlington Public Schools since 2002. She has worked as a social worker with pre-k, elementary, secondary, and adult learners. She is a bilingual (English/Spanish) Licensed Clinical Social Worker. She earned her MSW from Virginia Commonwealth University and holds a BA in studio arts and a BS in psychology from Virginia Tech. She enjoys creative endeavors and being outdoors in her free time.


Lori Ockerman
School Psychologist

Lori Ockerman joined the W-L staff in 2016, but has worked at various schools around the county as a psychologist since 1997.  She earned her BA from Morehead State University and her MA from George Mason University.  Prior to coming to Arlington, Ms. Ockerman served as an adjunct faculty member for  the University of Maryland in their European Division, and taught at the middle school level.  She enjoys travel, theater, concerts and cooking.
Brittnee Stephens

Brittnee Stephens

School Social Worker


Brittnee Stephens received a Bachelor’s Degree in Child Development and Family Relations at East Carolina University and a Master’s degree in Social Work at West Virginia University. Prior to coming to APS, Brittnee worked as a Medical Social Worker at Inova Fairfax Hospital. In her spare time, she likes to work out, eat and read books.

Ricia Weiner

Dr. Ricia Weiner

School Psychologist


One of her greatest rewards in life is watching a child grow and develop independence and confidence in their own skills. Her greatest passion is supporting families during their child’s dynamic and exciting educational and developmental journey. To this endeavor, she bring a breadth and depth of experience and expertise cultivated during her own educational, professional, and parenting journey. She holds a BSE in secondary education from the University of Arizona and PhD in school psychology from the University of Maryland, College Park. Her school psychology acumen has been sharpened over time by serving students and families professionally since 2001 in Arlington Public School, Cleveland Metropolitan School District, Magnificat High School in Rocky River, OH, Washington International School, and Whittle School & Studios before returning back to her professional home in APS.