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the family center staff

Our doctors and clinicians offer a wealth of experience in treating individuals who have incurred psychological trauma, suffer from depression & mood disorders, anxiety, bereavement & grief-related issues, eating disorders, medical illness, sexual and/or physical abuse and neglect, multicultural psychology and diversity, LGBT issues, and persons dealing with dual diagnoses. 

Glory Fox Dierker, Ph.D.
Executive Director
Clinical Psychologist
parenting coordinator
Erika J. Siegel, Ph.D.
Clinical Psychologist
parenting coordinator
Gus Nava, Ph.D.
Clinical Psychologist
parenting coordinator
Fran M. Holland Ph.D.
Clinical Psychologist

Dr. Gus Nava is a Licensed Clinical Psychologist who has been with The Family Center since 1993. He works primarily with adults in the areas of individual psychotherapy, couples therapy, group therapy, and parent guidance/education, as well as individual therapy with adolescents. His areas of clinical focus include depression, anxiety, psychological trauma, interpersonal conflicts, parenting coordination, and grief. He is an advocate of assisting clients to develop therapeutic life changes (TLC), which can enhance well-being (e.g., exercise, volunteering). Dr. Nava received his B.A. in Biology from the University of Virginia and his M.A. and Ph.D. in Clinical Psychology from Virginia Commonwealth University. Prior to his graduate work, he was a volunteer undergraduate researcher with the National Institute of Mental Health. While at VCU, he earned a Graduate Fellowship and worked as a Graduate Teaching Assistant/Research Assistant. His post-Ph.D. education has included completing the training, Parenting Coordination: Working with High Conflict Families. Dr. Nava has worked in a variety of settings including community mental health centers and rehabilitation hospitals as well as St. Elizabeths Hospital in Washington, DC, where he completed his pre-doctoral internship. He worked with the Metropolitan (DC) Police Employee Assistance Program, where he gained experience assisting officers with critical incidents debriefings. Dr. Nava is a volunteer clinician with Give an Hour, which is an organization dedicated to providing no-cost mental health services for troops and families affected by the post-9/11 conflicts in Iraq and Afghanistan.

Dr. Erika J. Siegel is a Licensed Clinical Psychologist who specializes in individual psychotherapy for adults and adolescents, as well as couples therapy, marital counseling, and parent guidance/education.  Her areas of clinical focus are bereavement and psychological trauma, anxiety, depression, and mood disorders.  Dr. Siegel graduated from Swarthmore College with a B.A. in the History of Art and received an M.A. in General Psychology and an M.A. and Ph.D. in Clinical Psychology from The Catholic University of America.  She completed her pre-doctoral internship at St. Elizabeths Hospital in Washington, DC, focusing there on work with older adults.  She completed her clinical residency in Emergency Services for Fairfax County before joining The Family Center 2004.  Dr. Siegel co-teaches the course, Parenting Together, Living Apart, with Dr. Glory Fox Dierker.  She is a member of the Association of Family and Conciliation Courts (AFCC) and has completed the training, Parenting Coordination: Working with High Conflict Families.

Dr. Glory Fox Dierker, Executive Director and Founder of The Family Center, is a Licensed Clinical Psychologist who specializes in individual psychotherapy for adults and adolescents, as well as couples therapy, marital counseling, group therapy, and parenting education and guidance.  Her research focuses on family relationships with an emphasis on adult intimacy and parent-child attachment. Her areas of clinical focus include psychological trauma, anxiety, depression, and mood disorder. Dr. Dierker has been devoted to improving the quality of life for individuals and families in Northern Virginia since 1971. She began as a social worker and child development specialist for the Alexandria Department of Social Services, and throughout the 1980s, Dr. Dierker developed and directed the Center for Women and Families, a parent education and support program. More recently, Dr. Dierker founded The Parenting Project, which focuses on parental guidance, education, and support. Dr. Dierker is a Virginia Supreme Court certified provider of the parent education seminar required of divorcing parents with minor children. She authored Parenting Together, Living Apart, a parenting manual based on scientific principles of Attachment Research; and the course by the same name. 

Calm Lake
Maggie Fox Dierker, J.D., M.S.W. Candidate
Family & Divorce Mediator
Parenting Coordinator

Dr. Fran Holland specializes in individual therapy; group therapy; couples therapy and marriage counseling; parental guidance and education; psychological assessment; neuro-psychological treatment and evaluation.

Maggie Fox Dierker, J.D. is a Virginia Supreme Court Certified Mediator in Virginia Circuit Court-Family and Juvenile & Domestic Relations Court. Ms. Dierker, a native of the Washington D.C. area, practiced corporate law prior to joining The Family Center in 2011 to focus her professional practice on alternative dispute resolution. Ms. Dierker practices mediation (family and divorce) and parenting coordination. She provides accountability & life coaching, executive coaching, and divorce coaching to clients. She is a Virginia Supreme Court certified parent education provider. Since 2001, Ms. Dierker has been counseling and representing children, adolescents, and families. She graduated from the University of Virginia, and Loyola University New Orleans School of Law; completed studies at Georgetown University (summer psychology curriculum), and abroad at the University of Vienna (Universität Wien) School of Law. Ms. Dierker has enthusiastically served children- and family-centered not for profit organizations such as Truancy Intervention Project, Midtown Assistance Center, and Court Appointed Special Advocates (CASA). Ms. Dierker holds a B.A. in psychology, is a member of the State Bar of Georgia, the American Bar Association, the Association of Family and Conciliation Courts and The Academy of Professional Family Mediators. Ms. Dierker was a regularly featured presenter at Second Saturday Fairfax/Arlington, What You Need to Know About Divorce, a panelist at the Northern Virginia Mediation Service (NVMS), and is a member of the Association of Family and Conciliation Courts (AFCC), with specialized training in Parenting Coordination: Working with High Conflict Families. Ms. Dierker is currently earning her M.S.W. at The Catholic University of America, National Catholic School of Social Service. Email: mfoxdierker@thefamilycenter.com

 
 
Jennifer Marceron Glienke, Ph.D.
Clinical Psychologist 

Dr. Jennifer Marceron is a licensed clinical psychologist at The Family Center. Dr. Marceron graduated with distinction with a bachelor's degree in psychology from the University of Virginia and with a Ph.D. in clinical psychology from The George Washington University in Washington, D.C. She completed her pre-doctoral internship at the University of Denver Health and Counseling Center (APA accredited) where she provided individual and group therapy to college-age adults in an integrated care setting. Dr. Marceron has worked in a variety of settings including community mental health, university counseling centers, and outpatient medical centers. Dr. Marceron specializes in individual therapy working with adolescents, young adults and adults dealing with eating disorders, anxiety, depression, relationship concerns, disability, and chronic illness. Dr. Marceron’s approach is client-centered and she uses evidence-based practices (CBT, ACT, DBT) tailored to meet the needs and interests of her clients. Email: jmarceronphd@thefamilycenter.com

Johanna Williams, Ph.D.
Clinical Psychologist Resident
Johnathan duff, Ph.D.
Clinical Psychologist 

Dr. Johnathan Duff is a clinical psychologist at The Family Center. He received his Ph.D. in Counseling Psychology from the University of Miami and completed his internship in clinical health psychology at The Ohio State University’s Wexner Medical Center. He specializes in individual therapy with adults and adolescents dealing with anxiety, depression, adjustment to life stress, and medical illness. He also works with children and specializes in testing and assessment for Attention-Deficit/Hyperactivity Disorder (ADHD). Dr. Duff has worked with several populations in a variety of settings including with veterans at a VA hospital, with children and adolescents at a children’s hospital, and with high performing athletes. Dr. Duff holds a bachelor’s degree from Boston College and a master’s degree in Sport and Performance Psychology from the University of Denver. He utilizes techniques from person-centered therapy, cognitive-behavioral therapy (CBT), dialectical-behavioral therapy (DBT), mindfulness, and acceptance and commitment therapy (ACT).

Amy Ebeid, Psy.D.
Clinical Psychologist
Psychological Assessments

Dr. Amy Ebeid is a Licensed Clinical Psychologist at The Family Center. She earned her doctoral degree in Clinical Psychology from The George Washington University. She completed her post-doctoral residency at St. Elizabeth’s Hospital, where she worked in the outpatient clinic with children, adolescents, and families. She also headed trainings on ADHD for parents.  Dr. Ebeid has been in private practice for 14 years. She specializes in working with adults and couples for issues ranging from relationship struggles to depression to anxiety. Dr. Ebeid has specialized training in working with trauma, such as abuse, domestic violence, and sexual assault, as well as training helping individuals with eating disorders. Dr. Ebeid is also a registered yoga teacher, having completed her 200-hour certification. She has a specific interest in trauma-sensitive yoga, a clinical intervention for complex trauma, healing, and the mind-body connection. Dr. Ebeid is also experienced in psychological assessments for children, adolescents, and adults, with specific expertise in administering and interpreting the Rorschach.

Laura Diskin Gottlieb,​ Psy.D.
Clinical Psychologist Resident

Dr. Laura Diskin Gottlieb is a resident in clinical psychology at The Family Center. She graduated from the University of Michigan with a B.A. in Psychology and earned her doctoral degree in Clinical Psychology from the George Washington University. 
Dr. Gottlieb specializes in individual psychotherapy with young adults and adults. She also provides psychotherapy to couples and adolescents. Dr. Gottlieb has a demonstrated interest in relationship concerns, grief and loss, women's health issues, medical illness, and family of origin issues. Dr. Gottlieb completed her pre-doctoral internship at Stony Brook University Counseling and Psychological Services in New York where she provided individual, group, and couples psychotherapy to undergraduate and graduate students.

Dr. Johanna Williams is a resident in Clinical Psychology at The Family Center. She specializes in family studies, mood disorders, trauma, and health care disparities. Dr. Williams has worked with both adolescent and adult individuals, couples, and families in the DC, MD, and VA area from rigorous institutions such as Johns Hopkins, Sheppard Pratt Hospital, and the D.C. Superior Courts. She has also worked in college-based settings such as the Howard University Counseling Center and Baylor University Counseling Center where she helped young adults and professional students manage early life and career transitions. Dr. Williams is psychodynamically trained and a member of the Brooklyn Seminars for Modern Psychoanalysis and a former psychoanalytic fellow with the Washington Center for Psychoanalysis. This extensive training taught Dr. Williams how to understand the complexity of distressingly chronic behaviors. Thus, she is able to collaborate with her clients about a variety of treatment options. Dr. William's comprehensive multi-cultural training has been a vital asset in her work with foreign exchange students, machismo dynamics, gender identity, aging, disability, sexual identity, Middle Eastern traditions, Black male identity development, community violence, military personnel, and cultural stigma concerning mental health. Dr. William's supplemental training in psychological and neuropsychological assessment helps her understand the totality of clients' presenting concerns and diligently seek professional expertise. She has spoken at several conferences about a number of psychological topics such as policing, psychology training, media, schizophrenia, and family trauma. She received her B.S. degree in psychology from Stevenson University in Stevenson, MD, her M.A. degree in psychology from Long Island University in Brooklyn, NY, and Ph.D. from Howard University in Washington D.C. 

Email: jwilliams@thefamilycenter.com

Zeyad Layous, Psy.D.
Clinical Psychologist

Dr. Zeyad Layous is a Clinical Psychologist at The Family Center. He earned his doctoral degree in Clinical Psychology from the George Washington University. Dr. Layous specializes in working with adults and adolescents in insight-oriented psychotherapy for issues ranging from relational problems to depression and anxiety. He also received specialized training in working with multicultural and minority populations on his pre-doctoral internship at the Center for Multicultural Training in Psychology in Boston, Massachusetts. Dr. Layous completed a post-doctorate fellowship at the Adult Outpatient Clinic at University of Miami/Jackson Memorial Hospital in Miami Florida, where he continued working with adults and also worked with individuals with medical illness. He is also experienced in providing a wide range of psychological assessment services for adults, adolescents, and children. Email: zlayous@thefamilycenter.com

Alyssa Poblete, Ph.D.
Clinical Psychologist Resident

Dr. Alyssa Poblete is a resident in clinical psychology at The Family Center. Dr. Poblete graduated with high distinction with a bachelor's degree in Psychology from the University of Virginia. Prior to graduate school, she worked as a project coordinator for a large, federally-funded research study on adolescent girls' depression and non-suicidal self-injury at the University of North Carolina-Chapel Hill. Dr. Poblete earned her Ph.D. in Clinical Psychology from The George Washington University. Her graduate research focused on co-parenting and parental self-efficacy in ethnically diverse families. She completed her pre-doctoral internship at American University Counseling Center (APA accredited), where she provided individual and group therapy as well as crisis intervention to a diverse range of university students. Dr. Poblete has experience working with children and adults in a variety of settings in the D.C. area, including community mental health, university counseling, and medical research centers. Dr. Poblete specializes in individual therapy working with adolescents and young adults experiencing concerns related to anxiety, depression, grief, identity, and relationships. She also has a strong interest in couples and group therapy. Dr. Poblete is an integrative clinician, drawing primarily from relational approaches and third-wave cognitive behavioral therapies that incorporate acceptance and mindfulness (ACT, DBT). She believes in the importance of working collaboratively with clients in order to understand and address their needs.  

Emily Petersen, Psy.D.
Clinical Psychologist 

Dr. Emily Petersen is a licensed clinical psychologist at The Family Center. She specializes in individual therapy and psychological assessment with adolescents and adults. Dr. Petersen earned her doctoral degree from Azusa Pacific University. She completed her internship at Southeast Human Service Center in Fargo, North Dakota where she provided individual and group therapy as well as psychological assessment services to children, adolescents, and adults. Email: EPetersen@thefamilycenter.com

Nora Posner, Psy.D.
Clinical Psychologist

Dr. Nora Posner is a licensed clinical psychologist at The Family Center.  She specializes in child and family mental health, providing treatment and assessment for psychopathology across the lifespan.  Dr. Posner offers individual therapy to children and adolescents suffering from anxiety, mood, and developmental disorders as well as those with ADHD, learning disabilities, and bullying concerns.  Dr. Posner also treats adults experiencing relationship issues, life transition difficulties, and other psychosocial stressors.  She also can administer comprehensive psychological and neuropsychological assessments for individuals needing diagnostic clarification to determine the source of difficulties.  Dr. Posner earned her undergraduate degree (B.A) from Lafayette College and graduated with a doctorate in clinical psychology (Psy.D.) from the Professional Psychology Program at The George Washington University.  Dr. Posner completed her yearlong pre-doctoral clinical internship in Stamford, Connecticut, at the Child Guidance Center of Southern Connecticut, Inc., where she stayed for an additional yearlong postdoctoral fellowship.

Amy Libow, Psy.D.
Clinical Psychologist Resident

Coming soon...

psychologist, divorce mediator & coaching, psychologist