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About Us

Caroline Ibrahim, Psy.D. LP
Licensed Clinical Psychologist/Owner

Sterling, VA  Psychologist

Dr. Caroline Ibrahim is the owner/founder of Dulles Psychological Services. She is an Egyptian-American clinical psychologist who immigrated to the USA in 1995 with her parents and older brother.

Dr. Ibrahim received her B.S. in Psychology and Criminal Justice from Old Dominion University and her doctorate (Psy.D.) in Clinical Psychology from Argosy University. Dr. Ibrahim has trained and worked in various clinical settings, including an inpatient residential setting, an outpatient clinic setting, a college counseling center setting and community mental health centers. Dr. Ibrahim prides herself in being a generalist with clinical interests in: multicultural and minority issues (including immigration/acculturation stress); trauma; family conflict; grief and loss; interpersonal and relationship difficulties; adjustment issues; emotion regulation; self-esteem and identity issues; and developmental issues.

Dr. Ibrahim provides psychotherapy to adults, children, and families. She also conducts psychological assessments and is available for consultations. Dr. Ibrahim is licensed as a clinical psychologist by the state of Virginia. She completed a postdoctoral fellowship at George Washington University and worked as a part-time psychologist at George Mason University Counseling and Psychological Services. She joined Dr. Goldberg and Associates group practice in 2013, with practice locations in Alexandria and Reston, Virginia. Dr. Ibrahim is also the owner and founder of Dulles Psychological Services, a comprehensive mental health private practice with current locations in Sterling, Virginia. 

Dr. Ibrahim’s approach to psychotherapy is one that is described as relational and integrative. Her approach is informed by empirical research on attachment, cognitive-behavioral therapy, interpersonal therapy, and family therapy. In her words, “Psychotherapy provides a corrective and healing therapeutic-relationship. It offers a safe environment for the individuals to share and process their experiences as well as develop insights into what is underlying their current challenges. Psychotherapy also provides individuals with coping strategies and skills to tackle life’s daily challenges. My role as a clinical psychologist is to provide you with this safe and therapeutic relationship, guide you through your exploration and path to growth, as well as offer you the opportunity to learn new skills and improve your functioning in order to enhance your life-journey.” Dr. Ibrahim

Michele Brennan, Psy.D.
Virtual Life Coach and Postdoctoral Fellow

Sterling, VA Life Coach and Psychologist

Dr. Michele Brennan has spent many years helping people find ways to deal with every day challenges. She is passionate about helping people by empowering them to face their daily challenges, improving their overall well-being and achieving personal success!

Her experiences in the study and treatment of these individuals have been instrumental in the development of her approach to life coaching; she empowers you to take the reins of your life and develop the skills that will help you reach your goals. 

Dr. Brennan attended Rutgers University, and graduated with a Bachelor's of Arts in Psychology. She also completed a Master of Arts in Psychology at Pace University. Upon completion, she began a doctorate program at Argosy University completing a Master's of Arts and Doctorate of Psychology in Clinical Psychology. Trained in the Practioner-Scholar model, Dr. Brennan approaches life coaching using skills and techniques that are supported by empirical research. 

Dr. Brennan worked for 4 years in addictions and with dual diagnosed psychotherapy patients. Additionally, Dr. Brennan has worked extensively with Traumatic Brain Injury (TBI) individuals, addressing cognitive difficulties, behavioral modifications, and developing compensatory strategies. She has worked in a forensic hospital, spent two years as a contractor for the Department of Defense (DCoE) as a subject matter expert, and within multiple private practice settings.

Presently, Dr. Brennan works as a Life Coach, helping individuals achieve their goals of self improvement through online coaching. Coaching provides her with the opportunity to offer her clients more behavioral guidance, support, and direction than is available in a more traditional psychotherapy settings. She is able to focus on the day to day details of achieving actualized goals. Additionally, online interfacing allows for more frequent contact, real time support, and the ability for clients to seek support more often. 

Mary Lou Plantz, LCSW
Licensed Clinical Social Worker

LIfe presents many challenges. Mary Lou's approach is to help each client navigate life challenges with resilience and a renewed sense of hope, utilizing strength-based and evidence-based techniques, such as Cognitive-Behavioral Therapy, Solution-Focused Therapy, Motivational Interviewing, and Mindfulness/Meditation. Interventions are tailored to each client and based on personal strengths and needs. She has helped hundreds of clients successfully cope with depression, anxiety, relationship issues, work issues, stress, and trauma, among other issues, using a results oriented approach.

Mary Lou is a graduate of Syracuse University with additional  clinical certification in the Treatment of Alcohol and Drug Abuse from New York University. She also has clinical certification and advanced training in Child and Adolescent Therapy from Fordham University. Treatment issues with children have included ADHD, self-esteem, bullying, and coping with divorce, with a goal of helping children thrive socially, emotionally, and academically.

Ms. Plantz has worked in various treatment settings, including hospitals,  medical clinics, private practices, and community clinics, including as a Clinic Supervisor. For the last few years, she has worked as a therapist and behavioral health consultant for the Dept of Defense, helping active duty soldiers, veterans, and their families cope with their unique challenges.

Mary Lou believes that every client has the power to change their life. She works collaboratively to help each client overcome challenges, cope with change, learn new life skills, and improve life satisfaction in a warm, accepting, and supportive environment.


Stephanie Humkey Causey, LCSW
Licensed Clinical Social Worker

Sterling, VA Depression and Anxiety Therapist

Stephanie is a Licensed Clinical Social Worker in the state of Virginia and Kentucky who provides psychological therapies and assessments to adolescents, adults, and couples. Her primary focus is in the treatment of depression, anxiety, trauma, dual diagnosis, grief, adjustment, and relational problems. Stephanie received a Master of Social Work Degree (with a specialization in mental health) from the University of Kentucky and a Bachelor of Arts Degree in Psychology from the University of Central Florida.

Her background includes clinical work and training in the corporate, educational, forensic, and therapeutic settings. Stephanie is experienced providing assessment, collaborative, and clinical services to children, adolescents, and adults in both community and private practices. She has worked in the field of mental and behavioral health for nearly 20 years. She is the owner of a private practice in Kentucky which she founded in 2008, working as a generalist as well as a clinical assessor and treatment provider of substance abuse. She holds an administrator license and a clinical supervisor certification for an alcohol and other drug entity (AODE) within the practice. Her background also includes work and board membership with non-profits addressing and aiding the homeless population.

Stephanie currently resides in the state of Virginia and works with Dulles Psychological Services providing individual, group, and couples therapeutic counseling and assessment, as well as Christian counseling. Her therapeutic approaches include Cognitive Behavioral Therapy, Rational Emotive Behavioral Therapy-Mindfulness, Insight-Oriented Therapy, and Interpersonal Therapy.


Tirsit A. Brooks, PhD, ABPP
Board Certified Licensed Psychologist

Sterling, VA Psychologist 

Dr. Tirsit Brooks is a board certified psychologist who has over 19 years of clinical and leadership experience.  She received her MA in Clinical Psychology and her PhD in Counseling Psychology from the University of Kentucky.  She specialized in using cognitive behavioral approaches for various disorders and subsequently earned her board certification through the American Board of Professional Psychology.  She is currently licensed to practice psychology in the states of Alabama and Virginia.

Dr. Brooks has trained and worked in a variety of settings to include inpatient and outpatient mental health facilities, crisis stabilization units, university counseling centers, community mental health clinics, and primary care as a behavioral health consultant.  For the past 15 years she worked as an Active Duty Air Force Psychologist during which time she provided treatment, as well as consulted with medical and unit leaders regarding various behavioral health concerns. 

Dr. Brooks’ practice is informed by current research, thus she implements a cognitive behavioral approach, along with interpersonal process and motivational interviewing strategies to address challenges.  Her clinical interests include working with individuals struggling with depression, anxiety, stress, occupational, and adjustment concerns.  She also has experience helping those who have medical challenges including chronic pain and high blood pressure.  She conducts fitness for duty evaluations and security clearance evaluations for military and civilian personnel associated with the Department of Defense due to her recent Active Duty experience.  Dr. Brooks is also able to perform psychological assessments and consultations as needed.  She enjoys conducting individual and group treatment with all age groups.


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