Maha M. Abdel-Kader, M.D.
Board Certified Psychiatrist

Dr. Abdel-Kader obtained her medical degree from Cairo University, Egypt in 1994. After relocating to the United States, she completed an externship at George Town University hospitals, followed by four years of residency training at Albert Einstein Medical Center in Philadelphia, PA. Upon completion of her residency, Dr. Abdel-Kader moved back to the Northern Virginia area and has been working in one of the area’s regional hospitals as a staff Psychiatrist. Dr. Abdel- Kader received her Board Certification by The American Board of Psychiatry and Neurology in 2003. 

With almost 12 years of experience treating the vast majority of Psychiatric disorders, she has developed a special interest in treating Mood, Anxiety and Attention Deficit Disorders. Dr. Abdel-Kader strives to combine the most recent advances in Psychopharmacology with a wholistic approach which helps restore balance and wellness by the principles of mind-body medicine. 


Zaigham Ansari, M.D. 

Dr. Ansari is a child, adolescent, and adult psychiatrist in practice since 1999.  He graduated from Baylor College of Medicine, Houston, TX.  Dr. Ansari sees children ages four and older with various diagnoses including ADHD, Bipolar Disorder, Depression, Anxiety Disorders, Psychotic Disorders, Developmental Delay, Behavioral and School Issues, etc. Dr Ansari also served as an AD Psychiatrist in the USAF and has knowledge in dealing with issues related to AD troops and their families. He speaks English and Urdu (Pakistani).  

Howard Glick, M.D.

Dr. Glick obtained a Master’s Degree in Microbiology and Immunology and his M.D. degree at Michigan State University. He did an Adult Psychiatry Residency through the University of California, Davis and a Child Psychiatry Fellowship at UCLA. He then worked for two years as Clinical Director of the Weber County Mental Health Center in Ogden, Utah.

He moved to Leesburg, VA in 1980 where he opened a solo practice in Child Psychiatry and worked as a staff psychiatrist at the Loudoun County Mental Health Center until 2010. In 1995, he was the only psychiatrist in Virginia to be awarded the Exemplary Psychiatry Award by the National Association for the Mentally Ill (NAMI). In 2010 he left Mental Health and closed his practice and joined the Inova Health System as a full-time psychiatric hospitalist at the Inova Behavioral Health outpatient clinic in Leesburg. In 2016 left Inova and joined the Potomac Psychological Center.

Hemalatha Mukhara, M.D. 
Board Certified Child, Adolescent and Adult Psychiatrist 

Dr. Hemalatha Mukhara, M.D. is a board certified Child, Adolescent and Adult Psychiatrist who received her medical degree from Madurai Kamaraj University in India. She completed her medical training at the University of Texas Medical Branch at Galveston (UTMB) where she completed a three year residency in General Psychiatry and a two year fellowship in Child and Adolescent Psychiatry. While at UTMB, Dr. Mukhara held the coveted position of Chief Resident of the Child and Adolescent Psychiatry Program. After graduation she joined Devereux Texas Treatment Network as Medical Director of a long term residential unit and as a consultant for Harris County Juvenile Probation Department. 

Dr. Mukhara is a member of the American Psychiatric Association and American Academy of Child and Adolescent Psychiatry. Dr. Mukhara joined Potomac Psychological Center in February of 2009 and also does outpatient work at Prince William Hospital.


Samantha Aviles, Psy.D

Clinical Psychologist

Dr. Samantha Aviles is a Clinical Psychologist in Virginia. Dr. Aviles received her Bachelor Degree in Psychology from George Mason University in 2008 and her doctorate degree in Clinical Psychology from the American School of Professional Psychology in 2018. Dr. Aviles completed her predoctoral training at the Haymount Institute where she provided psychological testing to a wide population. In addition, she completed a one year post-doctoral residency at Prince William Family Counseling, where she provided psychological testing and outpatient treatment for children, adolescents, families, and adults presenting with a range of clinical issues. Dr. Aviles specializes in the psychological evaluation of children, adolescents, and adults with proficiency in the assessment of learning, neuropsychological, and social-emotional functioning. Dr. Aviles is also certified in the assessment of autism spectrum disorder.

Dr. Aviles  works with children, adolescents, and adults, specializing in behavioral problems, anxiety disorders, and mood disorders. She uses an integrative approach with a focus on cognitive-behavioral therapy.

Ruth Brown, M.A., LPC

Ruth comes to Potomac Psychological with over 25 years of experience in treating adolescents, adults, and families. She specializes in substance abuse, EMDR for trauma, cognitive behavioral therapy, and anger management. She is well versed in general mental health issues, including mood disorders, depression, and anxiety. Ruth formerly worked at Loudoun County Mental Health and North Springs Behavioral Health, both in Leesburg, VA. Ruth has her Master’s in Counseling from Marymount University and is a Licensed Professional Counselor since 2001. Ruth says about her work, “I have such passion for what I do because I know that everyone gets better. Who they are when they come in will be different by the end of their therapy. As with all things, therapy takes motivation and commitment. If you have those 2 things, regardless of your diagnosis or your life circumstances, you will be a good candidate for therapy.”

In addition to her work, Ruth has 4 grown children. At home now, are Ruth and her 2 greyhound dogs, Grady and Dee Dee.

Fiona Brown, M.A., LPC

Fiona is a Licensed Professional Counselor who specializes in working with children and adolescents with substance use, depression, anxiety, behavioral issues and trauma. Fiona received a Bachelor's degree in Psychology from James Madison University and a Master's degree in Mental Health Counseling from the University of Virginia.

For the past 10 years Fiona has worked primarily with children and adolescents providing individual, family and group therapy. She uses a strength-based, solution-focused cognitive behavioral approach to helping clients find motivation for change and instill hope in the change process.

Shelby Brownlee, LPC

Shelby is a Licensed Professional Counselor in Virginia since 2002. She earned a B.A. in Writing from University of Pittsburgh and her Master’s degree in Psychology from Marymount University in Arlington, Virginia. She has worked in psychiatric rehabilitation programs and community mental health in Fairfax County since 1995. Shelby joined Potomac Psychological Center in July 2012 and works primarily with Adults and Adolescents who are challenged by depression, anxiety, addiction issues, grief & loss, multi-cultural issues, life transitions, or who seek life coaching. 

Shelby believes motivated people can make change, and she uses cognitive behavioral, brief solution-focused, family systems theory, and faith perspectives to seek engagement with each client. Shelby has extensive experience with Individual, Group, and Family Therapy.

Matthew Buban, LCSW

Matthew Buban is a Licensed Clinical Social Worker who specializes in working with children and adolescents dealing with depression, anxiety, behavioral issues and trauma. He received a Bachelor of the Arts in Philosophy from St. John’s College, and a Master of Social Work from West Virginia University.  For the last twelve years, Matthew has worked in a psychiatric inpatient setting focusing on assisting clients and their families by utilizing strength-based, solution-focused CBT and DBT therapeutic interventions.

Matthew is dedicated to providing clinical services that are client-centered and focus on empowering individuals to make necessary changes in their lives.

Lida Far, M.S., LPC

Lida Far is a Licensed Professional Counselor (LPC) certified by the Virginia and Maryland Board of Counseling. She received her Masters Degree in Clinical Counseling from Johns Hopkins University. Ms. Far is bilingual and is fluent in Farsi. She has experience working with ethnic and culturally diverse individuals and families, multicultural, and marital issues. 

Ms. Far offers individual, family, and couples therapy.

Donna Fengya, LCSW

My approach to therapy and counseling starts with a warm, supportive relationship while including psychoeducation as well as the introduction of new skills.  I utilize a strengths-based perspective, honoring each client’s innate abilities, while utilizing CBT, DBT, and Motivational Interviewing to guide clients toward growth.  I work with mood and anxiety disorders, adjustment challenges, school-related challenges, and parenting concerns.   


I have an undergraduate degree in Economics from the University of Hawaii, and my graduate degree in Social Work is from Virginia Commonwealth University.  I have many years of experience, including fourteen years with the public school system. 

Katherine Fisher, Psy.D. 
Licensed Clinical Psychologist

Dr. Kacie Fisher is a Licensed Clinical Psychologist in Virginia. Dr. Fisher holds a Master’s degree in Social Work from Catholic University in Washington, DC (1996) and a Doctorate in Clinical Psychology from the American School of Professional Psychology in Virginia (2008). She has a wide range of experience in work with individuals, families and groups in out-patient and in-patient settings in New York, Virginia, Maryland and Missouri. Her experience includes therapy, psychological assessment and program development/management. Dr. Fisher specializes in the psychological evaluation of children and adolescents with proficiency in the assessment of learning, forensics, neuropsychological and social-emotional functioning. 

The therapeutic approach that Dr. Fisher utilizes integrates cognitive-behavioral therapy with elements of mind-body awareness, strengths-based work, yoga, creative arts and positive psychology. 

Nick Gentile, M.A., LPC
Director of Clinical Services

Nick Gentile, M.A., LPC received a Bachelor of Arts from Virginia Polytechnic Institute and a Master of Arts from Appalachian State. He gained valuable clinical experience working in a psychiatric hospital setting with adolescents. He currently sees children, adolescents, and adults dealing with anxiety, depression, stress management and behavior problems. He also sees couples and families addressing a multitude of systems within the therapeutic context. 

Nick practices with a cognitive behavioral approach and is client-centered in setting treatment goals.

John L. Gingras, MA

John L. Gingras is a Licensed Professional Counselor (LPC) certified by the Virginia Board of Counseling and a Licensed Mental Health Counselor (LMHC) by the Florida Department of Health. John uses a person-centered approach that focuses on a person's strengths and creativity. He works with individuals, couples, families, adolescents and children over the age of 5. John has a particular interest in facilitating quick results by using Brief Models of Psychotherapy to use in today's challenging world. John received his Master's Degree at Governors State University in Counseling with a specialization in Community Counseling. 

John has over 15 years experience working with people of all faiths and backgrounds. Mr. Gingras is a therapist who respects all religious traditions and the search for spiritual discernment.

Dawn Russ Gingras, M.A., LPC

Dawn Russ Gingras has over 15 years experience helping people with mental health and substance abuse problems through inpatient, outpatient and drug court experiences. She works with a diverse population of individuals and couples over the age of 18 using an integrated approach developed with each individual client’s needs and strengths in mind utilizing cognitive behavioral, motivational interviewing/enhancement, EMDR, and solution focused therapy models.

Dawn is committed to supporting the person in their personal healing journey is open to all faith perspectives as well as the 12-steps and rational recovery models.  Her special interests include mood disorders, co-occurring disorders, trauma resolution, women’s issues, stress management and transitional issues. Dawn is a Licensed Professional Counselor (LPC) certified by the Virginia Board of Counseling and has been with Potomac Psychological Center since 2009. Dawn earned her Master’s Degree in Psychology from the University of West Florida.

Sherry Hoover, M.A

Sherry Hoover received both of her Master's of Arts degrees from Marymount University in Counseling Psychology and Forensic Psychology. Over the years she has held many posts in various therapeutic settings ranging from inpatient, outpatient, residential and community mental health. She gained experience at a dual diagnosis practice in San Diego and volunteered with military families from Camp Pendleton. 

Sherry utilizes a cognitive-behavioral approach in working with mood disorders, substance abuse, trauma, and behavioral issues with individuals of various ages, couples and families. She is also an American Red Cross Mental Health Disaster Relief Worker who has worked with victims at the Pentagon after 9/11 and of hurricane Katrina. 

Mary Rogers Kirby, 


Mary Rogers Kirby is a Licensed Professional Counselor. She received her Master of Education and Education Specialist degrees in Counseling from the University of Virginia. Mary Rogers previously worked in home based and community behavioral health settings. She works with adults, adolescents, and children, specializing in mood issues, anxiety, trauma, substance use, and adjustment issues. She works with families addressing behavioral issues with adolescents. Mary Rogers utilizes a cognitive-behavioral approach that is strength based and solution focused.

Kristin Kowalski,


Kristin is a licensed clinical social worker in the state of Virginia. She received her Bachelor of Arts in Psychology from George Mason University and her Master’s of Social Work from Virginia Commonwealth University. Kristin has worked in the field for the past 8 years, in a variety of settings. Primarily, Kristin has worked with youth and families in a residential setting but also has experience as an intensive in-home counselor, school based case worker and in adult rehabilitation. Kristin works with children, adolescents, adults and families struggling with a multitude of challenges such as mood disorders, self-esteem, relationship problems, complex trauma, addiction and youth defiance. Particular interests include positive parenting, behavioral analyses and play therapy. Kristin implements a variety of techniques in her work including cognitive-behavioral, solution focused therapy, play therapy, structural therapy and insight oriented psychotherapy. Kristin is currently pursuing certification as a sex offender treatment provider and plans to pursue certification as a play therapist in the near future.

Stacey Lefing, PsyD

Dr. Stacey Lefing is a licensed clinical psychologist.  She received her Psy.D. in Clinical Psychology from The Chicago School of Professional Psychology in Illinois and is credentialed with the National Register of Health Service Psychologists.  She completed post-doctoral training at a group practice in Indiana, where she worked for five years and provided psychological evaluations, neuropsychological evaluations, and individual therapy, before moving to Virginia. She specializes in the psychological evaluations of children, adolescents, and adults, including evaluation of academic, cognitive/intellectual, emotional, and behavioral functioning, personality testing, and pre-surgical evaluations for spinal cord stimulators.  She also provides individual therapy with adults who experience anxiety, mood disorders, trauma, grief/loss, self-esteem issues, and other challenges, incorporating psychodynamic and cognitive-behavioral approaches.  

Kristin Mischou, LMFT

Kristin Mischou is a Licensed Marriage and Family Therapist, licensed by the Virginia Board of Counseling and the California Board of Behavioral Sciences. She received her Bachelor's degree in Psychology and Master's degree in Counseling Psychology at Marymount University in Arlington, VA. She started her professional career in in Los Angeles, CA and has worked there in the mental health field for 15 years, primarily in residential, community-based and juvenile detention center settings providing individual and family therapy with adolescents. She was a clinical supervisor for 5 years just prior to relocating back to Virginia and joining Potomac Psychological Center. Kristin utilizes a humanistic approach grounded in existential therapy, motivational interviewing and narrative therapeutic techniques. She works as a collaborator with the client using their unique qualities to help them identify their stressors, increase self-understanding and change any self-destructive thoughts, behaviors, patterns to help them find personal fulfilment.


Kristin works with adolescents and adults dealing with anxiety, mood disorders, behavioral/oppositional issues, transitional issues, anger management, trauma-related issues.

Terry Moon, LCSW
Licensed Clinical Social Worker

Terry Moon is a Licensed Clinical Social Worker. Ms. Moon earned her Master of Social Work degree from Virginia Commonwealth University. She has worked with ethnic and culturally diverse populations of multiple faith traditions in homes, hospitals, and nursing homes. Ms. Moon has assisted children over 7, adolescents, adults and senior citizens with issues of grief and loss, post-traumatic stress disorder, chronic medical conditions, depression, anxiety and trauma. She provided services to survivors of September 11, 2001. 

Ms. Moon focuses on an individual’s strengths using cognitive behavioral techniques and solution focused therapy.

Sonya Ruparelia, Psy.D.
Licensed Clinical Psychologist

Dr. Sonya Ruparelia received her Bachelor Degree in Psychology from the Pennsylvania State University in 1998 and her doctorate degree in Clinical Psychology from the Georgia School of Professional Psychology in 2004. Dr. Ruparelia completed her predoctoral training at a residential treatment center for severely emotionally disturbed youth in New York. In addition, she completed a one year post-doctoral residency at the Fairfax County Mental Health Services, where she provided psychological testing and outpatient treatment for children, adolescents, families, and adults presenting with a range of clinical issues. 

Dr. Ruparelia works with children, adolescents, and adults, specializing in the treatment of mood disorders (e.g., depression), anxiety disorders, and behavioral problems (e.g., ADHD and Conduct Disorder). She has a particular interest in working with individuals with a history of trauma and loss. Dr. Ruparelia provides cognitive and social/emotional evaluations, individual, play, and family therapy, parent guidance, and anger management.

Ruth Stephen, PhD
Licensed Clinical Psychologist

Dr. Ruth Stephen is a licensed clinical psychologist in Virginia. She completed her Master of Science and her Doctorate in Clinical Psychology at Loyola College in Maryland. She has worked in various setting including outpatient, inpatient and forensic settings. Her clinical work has included individual, marriage, family and group therapy, psychoeducational groups as well as cognitive and social/emotional evaluations with children, adolescents and adults. Her clinical interests include working with adolescents and adults on management of mood and anxiety, behavioral modification and personality disorders. 

Interpersonal theory and cognitive-behavioral approach are incorporated into her treatment style. Dr. Stephen is a member of the American Psychological Association and American Counseling Association.

Stacey Stickley. M.A., LPC

Director of Operations

Stacey Stickley, M.A., LPC, began private practice with Sterling Behavioral Health Services in 2001. She moved to the Potomac Psychological Center in 2006 and has been here ever since.  She received her Bachelor of Arts from The College of William and Mary in Virginia and her Master of Arts in clinical psychology from Loyola College in Maryland.  Ms. Stickley offers individual, family, and couples therapy employing a cognitive-behavioral approach to address anxiety and mood disorders and behavioral issues.  Prior to transitioning to private practice, she gained valuable clinical experience in residential settings.  She started her professional career in a residential substance abuse (dual diagnosis) treatment center for adolescents outside of Winchester, VA.  She also worked in an adult acute psychiatric hospital unit and a long-term adolescent residential hospital in Loudoun County addressing combined mental health and behavioral problems. 

Her vast experience with chronic and severe mental health issues helps her connect within the therapeutic relationship with clients, ages 6-60, who span diverse socio- and economic backgrounds.

Jennifer Evans

Jennifer Evans comes to Potomac Psychological Center from Loudoun County Mental Health where she specialized in treating substance abuse disorders in adolescents and adults. She received her Bachelor’s of Science in Psychology from James Madison University and her Master’s of Education in Counseling from Virginia Polytechnic Institute. Jennifer is a Virginia Licensed Professional Counselor who has worked with adolescents and adults in inpatient, outpatient, residential and community mental health settings. 

Jennifer offers individual, family, and couples therapy and utilizes a cognitive-behavioral approach in working with mood and anxiety disorders, substance abuse related issues, and behavioral concerns.