Behavioral Health

Ramfis Marquez, PhD, LPC
Behavioral Health Director

Dr. Ramfis L. Marquez is the Director of the Behavioral Health Department. He holds a Doctorate in Clinical Psychology and is a Licensed Professional Counselor in the State of Virginia. Dr. Marquez studied at Walden University and Inter American University of Puerto Rico and has worked in the field of mental health for 20 plus years. He has specialized experience working with Children, Adults, Geriatrics, Individual, Couples and Families in both English and Spanish. Dr. Marquez has developed expertise in the areas of Trauma, ADHD, Asperger’s Disorder (Autism Level 1), Depression, Anxiety and other DSM disorders. Dr. Marquez approaches therapy from a holistic perspective, using techniques from client focused, humanistic, motivational and reality-based therapies.

In his free time, Dr. Marquez enjoys reading, music, history, stand up paddle boarding, cooking, dancing, playing the guitar, sports cars, martial arts and Science Fiction.

Fluent in Spanish.

Zaida I Dayton, PhD, LPC, CCMHC, CCTP.
Behavioral Health Clinical Supervisor

Dr. Zaida I Dayton is the Clinical Supervisor for the Behavioral Health Department and a bilingual Behavioral Health Consultant. Dr. Dayton obtained a Master of Science in Mental Health from the University of Phoenix and a doctorate in Advanced Studies in Human Behavior from Capella University. She is a Licensed Professional Counselor in the state of Virginia and holds various board certifications, including Certified Clinical Mental Health Counselor (CCMHC) and a Certified Clinical Trauma Professional (CCTP). She has counseled professionally for 10 years as a generalist who addresses various areas of mental wellness and enjoys working with all populations (minors and adults), providing these services in both English and Spanish. With a multimodal approach to treatment, using modalities like Choice Theory/Reality Therapy (CTRT), Cognitive Behavioral Therapy (CBT), and Gottman Method to Couples Counseling, Dr. Dayton works to meet clients' specific needs, with an ultimate goal of empowering her clients to make behavioral choices that create the necessary changes to improve their quality of life.

In her free time, Dr. Dayton enjoys playing volleyball, running, music, going to the movies, and spending time with family and friends.

Fluent in Spanish.

Jean-Andre Constant, LCSW, CSOTP
Behavioral Health Consultant

Jean-Andre Constant is a multilingual behavioral health provider. He is a licensed clinical social worker certified as a sex offender treatment provider. He obtained a master’s degree in social work from the University of Puerto Rico, Río Piedras Campus, and a Bachelor of Arts in human services from the State University of Haiti. Mr. Constant also completed a postmaster's certificate in clinical supervision at the University of Connecticut School of Social Work. Ms. Constant carries a solid two-decades spanned clinical background, applying strength-based, trauma-informed care and evidence-based practices to integrated care, individual, couple and family therapy, sex offense risk assessment and treatment, teaching, training and supervision. Besides English, Mr. Constant is fluent in Spanish, Haitian Creole and French. Mr. Constant adheres to an eclectic approach to therapy, combining CBT, client-centered, reality-choice therapies, and the Good Life Model (mostly when working with sex offenders).

Mr. Constant's favorite activities include traveling, watching movies, reading, and listening to music.

Patricia Crosby, LPC MEd
Behavioral Health Consultant

Ms. Crosby is a native from Peru. She graduated with honors as a Licensed Clinical Psychologist at the Ricardo Palma University, Lima, Peru in 1996. She immigrated to the United States in 2001 and started working with at-risk youth, providing intensive counseling services for over 10 years. She obtained a Master’s degree in Counseling / Community Agency track at George Mason University, Fairfax VA in 2012. Ms. Crosby has been working in private practice since 2013 obtaining her License Professional Counselor (LPC) in 2016.

Ms. Crosby provides individual and couples counseling to clients dealing with: acculturation issues, anger problems, anxiety, depression, academic problems, lack of social skills, interpersonal challenges, ADHD, parenting, divorce, and Psycho- education among others.

Fluent in Spanish.

June Toth, LPC
Behavioral Health Consultant

June Toth is a Licensed Professional Counselor in the Commonwealth of Virginia. She holds a M.A. in Clinical Counseling and completed her undergraduate with a major in Psychology, magna cum laude, at Regent University. June has over 20 years of experience working with adults, children, and adolescents through academic instruction, mentorship, group facilitation, and clinical counseling. She supports clients and their families with both situational and chronic issues of depression, anxiety, social/relational dynamics, personality disorders, cognitive deficits, and socioeconomic challenges.

June ascribes to a holistic approach, integrating models of counseling that address mind, body, and spirit. She views the counseling session as a sacred time of self-discovery, healing, and growth.

June enjoys spending time with her family, journal writing, reading (especially inspirational biographies and literary classics), fitness, and the beach. 

Maureen Romano, LCSW
Behavioral Health Consultant

BMaureen Romano is a Licensed Clinical Social Worker with over 20 years’ experience working with children, adolescents, and families in the school and residential settings. Maureen earned her Master of Social Work from The University of Maryland and an undergraduate from Virginia Tech.

Maureen has worked with individuals, families and couples dealing with anxiety, depression, ADHD, trauma, social challenges, grief and loss and other disorders and issues. Maureen incorporates a multimodal approach to treatment to help empower the client to move forward.

Maureen enjoys spending time with her family, in addition to swimming and walking.

Krystal Hawkins, MSN, RN, PMHNP-BC
Psychiatric Nurse Practitioner

Krystal Hawkins is a board certified Psychiatric and Mental Health Nurse Practitioner. Krystal completed her undergraduate Bachelor of Science degree in Nursing with a minor in Psychology from Virginia Commonwealth University. She went on to obtain her master’s degree in nursing from The Johns Hopkins University and after a few years would go on to complete a post-master’s certificate in Psychiatric Mental Health Nurse Practitioner from Drexel University. She is highly trained in psychiatry offering well-developed interpersonal, acute care treatment and relationship building skills. Krystal is experienced in delivering skilled care with a career within the mental health community spanning more than 13 years. She is a proponent of a holistic approach placing great value in meaningful communication, meeting people where they are, and bridging the gap to promote accessibility and equity. Krystal is committed to providing excellent care to patients of all backgrounds across the lifespan.

In her free time Krystal enjoys spending time with family, working out, exploring new places, trying new foods and indulging in self-care activities!

Stephen Andrews, LMSW
Supervisee in Social Work

Stephen completed his Masters in Social Work with a concentration in clinical practice from George Mason University in 2020, his Bachelor’s Degree in Psychology from George Mason University in 2017, and his Associates Degree in Business Administration from Northern Virginia Community College in 2014.

During his graduate studies, he interned as a behavioral health consultant here at the Greater Prince William Health Center and the Mason and Partners Clinic, as well as a juvenile probation officer at the Virginia Department of Juvenile Justice, where he developed a passion for working with at risk youth. Stephen emphasizes the mutual development of unique goals tailored to the individual needs of the client, as well as utilizing a strength’s-based approach to empower each client in the therapeutic process. He incorporates a variety of treatment modalities, including Cognitive Behavioral Therapy, Dialectical Behavioral Therapy, Solution Focused Therapy, Motivational Interviewing, and Reality Based Therapy. Recognizing the ethnic diversity of Northern Virginia, Stephen brings a culturally competent approach to foster a safe and genuine environment for each of his clients. Stephen works with children, adolescents, adults, and families. Prior to returning to GPW, he worked for a year and a half at Occoquan Counseling, LLC in Woodbridge, VA.

In his spare time, he enjoys golfing, spending time with his family, traveling, and cheering on his beloved Philadelphia Eagles.

Francisco J. Cornejo, LMSW
Supervisee in Social Work

Francisco J. Cornejo completed his B.S. in Psychology from Virginia Commonwealth University and continued his education at George Mason University, as he pursued a Master's degree in Social Work. Francisco has focused his work on trauma and recovery within the Latinx and migrant community by delivering behavioral health services in community health centers located in Prince William County. Francisco additionally has worked to increase the participation and collaboration among various community entities to aid in increasing access to necessary resources for the Latinx community.

In his free time Francisco likes to do wood working, restoring old technology, building computers, riding motorcycles, and fixing cars.

Fluent in Spanish.

Anneliese Peredo, QMHP-A&C, MS
Resident in Counseling

Anneliese is a bilingual consultant who completed her Masters in clinical Mental Health Counseling from Walden University in 2023, and her Bachelors of Science from The College of William and Mary in 2012. She has 15 years of experience in the medical field where she worked as a medical assistant, first responder, organ donation specialist, and behavioral health coordinator.

As part of her studies, she completed her internship at The Women’s Center where she worked with couples, individuals of all ages and families recovering from grief, trauma, addiction, and other stressful life events. She looks forward to meeting clients wherever they are in their life journey and helping them achieve their wellness goals.

In her free time, she enjoys reading romance novels, glamping, hiking, crafting, and trying new foods.

Fluent in Spanish.

Jenny Alvarez, LCSW
Licensed Clinical Social Worker

Jenny Alvarez is a Licensed Clinical Social Worker who is bilingual in Spanish. She has a B.A in Psychology from New Jersey City University and a Master’s in Social Work with a certification in School Social work from Virginia Commonwealth University. She has experience as a School Social Worker, Group Home Manager, Case Manager for the Office of Refugee and Resettlement, and Home Base Counselor. Jenny has worked with adults with developmental and intellectual disabilities, unaccompanied minors, at-risk youth, and children and families facing various adversities. She also has experience conducting mental health and trauma assessments. Jenny’s approach is eclectic, modifying her approach to meet client’s needs. She likes integrating strength-based and trauma informed-care practices helping clients identify their strengths and feel empowered during the therapeutic process.

In her free time, Jenny enjoys spending time with her family, baking, exercising, and traveling.

Fluent in Spanish.