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Therapists in San Diego

The therapists listed below offer both in-person and telehealth (video) psychotherapy at Positive Change Counseling Center

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Miriam Kopf, MFT

MFT #137812

Miriam (she/her/hers) is a Licensed Marriage and Family Therapist who is devoted to providing support to people from all walks and phases of life on their paths to finding peace within. In her practice, Miriam employs a client-centered approach from a strengths-based and solution-focused lens. She is collaborative and adaptive with her use of therapeutic interventions based on her own scope of practice and clients’ background and needs. She values the importance of the therapeutic relationship and how cultural awareness and intersectionality play the greatest role within it. Miriam strives to empower her clients to recognize that they that they know themselves best, and their life experiences and values help guide them forward and through whatever may be their way.

Miriam has worked with a variety of populations in partial hospitalization and intensive
outpatient care, as well as school based and private practice settings. She has experience
working with couples and individuals of all ages in the areas of stress and anxiety, depression, PTSD, relationship issues, women’s issues, school issues, self-esteem, borderline personality disorder, and life transitions. Miriam comes to this work with a master’s degree in counseling psychology from The Wright Institute in Berkeley, California, as well as an undergraduate degree in psychology from University of California Santa Cruz.

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Riley Bastien, APCC

Registered AMFT #11836 (Supervised by Dr. Katrin Seifert, PsyD #26257)

Riley (She,her) is an Associate Professional Clinical Counselor who is passionate about aiding children, adolescents, teens, adults, families, and couples to explore their identities and navigate the ups and downs of life. Riley prioritizes creating a therapeutic and collaborative space for clients to experience unconditional positive regard and allows them to have a voice of their own. Riley received her Bachelor’s degree in Psychology from Waldorf University, where she was the vice president of the psychology club and interned at a supervised visitation clinic. After her undergraduate studies, Riley
worked full time as a Registered ABA therapist conducting in home early intervention to children on the Autism Spectrum. Riley then completed her Master’s degree in Clinical Mental Health Counseling from the University of San Diego, where she interned at two practicum sites ranging from a crisis house setting to an outpatient clinic. Riley has experience working with mild, moderate, and severe mental health diagnoses.

Riley works from a Trauma-informed and Person-Centered lens and focuses on tailoring treatment to each individual person. Therapeutic modalities of specialty include: Internal Family Systems, Cognitive Behavioral Therapy, Acceptance and Commitment, Adlerian, Compassion and Culturally sensitive focused, Gestalt, Humanistic, Mindfulness-Based, Dialectical Behavioral Therapy, Motivational Interviewing, Positive Psychology, Gottman couples work, Solution-Focused, Strengths-Based, Trauma- Focused CBT, and other integrative models and techniques as appropriate. Riley enjoys building a close
therapeutic relationship using humor, non-judgmental active listening, and authenticity.

Diagnoses and areas of therapeutic specialty include: Anxiety disorders, Depressive disorders, Trauma and stress-related Disorders including PTSD, Autism Spectrum Disorder, ADHD, Developmental Disorders, Co-occurring substance or alcohol use disorders, Childhood abuse and trauma, Domestic violence, Adjustment, Life transitions, Gender Dysphoria, Sexual orientation exploration, Military and Family, Parenting, Post-Partum, Interpersonal relationship issues, Insomnia, Grief and loss, Disordered
Eating behaviors, Suicidality, and mild to moderate Psychosis.
Populations of specialty: Human beings of all kinds! Riley is well versed in working with marginalized communities, LGBTQ+ individuals, Low SES, and ages of all kinds. She encourages all who come through her door to be their true and authentic self.

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Katherine "Katie" Mattea, AMFT

Registered AMFT #136811 (Supervised by Dr. Katrin Seifert, PsyD #26257)

Katie (she/her/hers) is a registered Associate Marriage and Family Therapist who is passionate about providing culturally sensitive, affirming, and individualized care for her clients. Katie believes that therapy is not a one-size-fits-all experience. Katie values respect for her clients’ individuality, and strives to create a safe space for folks to come to recognize and express their most authentic selves on their path to working towards their therapeutic goals. 


Katie enjoys working with teens, adults, families, and couples. Some particular areas of interest for Katie are individuals who are exploring their gender, sexuality, or other aspects of their identity. As part of the community herself, Katie feels especially passionate about providing affirming care to LGBTQIA+ youth, adults, and couples facing relational issues, life transitions, gender dysphoria, stress, depression, anxiety, or difficulty with self-compassion.


Katie graduated with her Bachelor of Science degree in Psychology from the University of California, San Diego and Masters in Clinical Counseling from Point Loma Nazarene University. Katie has experience in a variety of settings, including residential treatment, partial hospitalization programs, and outpatient clinics. Katie approaches therapy from a person-centered and strengths-based lens, seeing each individual client for their unique attributes while helping them recognize just how capable they already are. Katie has experience utilizing Solution-Focused Therapy (SFT), Cognitive Behavioral Therapy (CBT), and particularly enjoys integrating Internal Family Systems (IFS) therapy, as she firmly believes there is great value in developing a more understanding and compassionate relationship with all of our unique parts.

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Katherine "Katie" Paul, APCC

Registered APCC #7331 (Supervised by Janette Valverde, MFT #85853)

Katie, a native San Diegan, is an Associate Professional Clinical Counselor here at Positive Change Counseling Center who is looking forward to joining you on your journey to better overall wellness. Working from a background of culturally competent, trauma-informed care and a strengths-based approach, Katie uses humor, warmth and compassion to help each client feel seen and safe. Experienced in providing Dialectical Behavioral Therapy, Katie is confident in providing evidence-based tools to help those suffering from intense emotions to feel grounded and empowered as well as rebuild trust within themselves.


Katie has earned degrees for her undergraduate studies at Valparaiso University in Indiana before coming back to California to earn her Master’s in Clinical Mental Health Counseling at University of Redlands. Katie is experienced in working with diverse populations struggling with acute and chronic trauma backgrounds at domestic violence shelters and programs for low-income clients and their families. Katie has also worked with young adults in a college setting and wishes to continue to work with adolescents, young adults and adults. Throughout these opportunities, Katie has had extensive training in parenting support, boundary setting, harm-reduction approaches to substance use, transgenerational trauma, attachment styles, motivational interviewing, cognitive behavioral therapy and mindfulness practices.


Katie, being deeply aware of how our complex intersecting identities influence our lens of the world and our issues, is excited to provide space where each client can feel affirmed in their identity. With this framework, she hopes to support all clients in meeting their mental health goals and continue to be an advocate in the community for lasting change.

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Natalia Cameroni-Adams, AMFT

Registered AMFT #126774 (Supervised by Janette Valverde, MFT #85853)

Natalia (she/her/hers) is an Associate Marriage and Family Therapist who joined Positive Change Counseling in the summer of 2023, bringing a compassionate and client-centered approach to therapy. With a commitment to tailoring treatment to each individual's unique needs, she provides comprehensive therapy services including individual, group, and family therapy. Drawing from a diverse range of therapeutic modalities, Natalia integrates Cognitive Behavioral Therapy (CBT), Acceptance and Commitment Therapy (ACT), Dialectical Behavioral Therapy (DBT), Internal Family Systems (IFS) and Emotional Focused Therapy (EFT) into her practice. This eclectic approach allows her to address a wide range of concerns and support her clients in achieving their therapeutic goals.

Natalia earned a Bachelor of Arts degree in Psychology from the University of California, San Diego (UCSD), and obtained a Master of Arts degree in Marital and Family Therapy from the University of San Diego (USD). She has previously worked in primary care settings providing short-term interventions. She also has a background working within an Eating Disorder Partial Hospitalization Program, providing trauma-informed distress tolerance treatment. Natalia's extensive experience encompasses working with adolescents, families, adults, individuals, and couples struggling with various challenges such as anxiety, depression, grief, shame, trauma, body image, eating disorders, and relationship conflicts. Her ability to create a safe and non-judgmental space enables her clients to explore their thoughts, emotions, and experiences, facilitating personal growth and transformation.

Natalia welcomes clients from diverse backgrounds, cultures, sexual orientations, and generations. By fostering a strong therapeutic alliance, she ensures that each individual's unique experiences and identities are honored and respected throughout the therapeutic journey. Passionate about empowering her clients, Natalia integrates psychoeducation into her sessions, providing valuable insights and resources that enable clients to develop a deeper understanding of their struggles and take meaningful steps toward healing and growth. Through her warm and collaborative approach, she guides clients in exploring their inner strengths, building resilience, and embracing positive change. Natalia looks forward to accompanying you on your personal growth journey, offering support, guidance, and compassionate care every step of the way.

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Alexandra "Lexi" Roa, LPCC

LPCC #16623

Lexi (she/her) is a Licensed Professional Clinical Counselor who works from a trauma-informed and strengths-based lens to support clients in achieving their goals. She approaches therapy from a place of authenticity, collaboration, and compassion. Lexi believes that each of us is the expert on our own unique experiences, and we therefore have the power and ability to make the positive changes necessary to lead fulfilling lives. She often integrates DBT, Internal Family Systems, CBT, self-compassion, and positive psychology interventions to support clients. 


Lexi received her Bachelor's degree from Chapman University, and her Master's degree in Clinical Mental Health Counseling from University of San Diego. She has experience working with adults and teens on building healthy relationships and boundary setting, strengthening healthy parenting skills, processing grief, overcoming difficult life transitions, and navigating depression, anxiety, and trauma.


She values the opportunity to embrace each person’s unique cultural background, as our ethnicity, race, sexual and gender identities all contribute to who we are and are integral parts of the way we experience mental and emotional well-being. Lexi recognizes the healing power of simply being truly heard and understood, and she creates a supportive, compassionate space where individuals can experience this. She looks forward to the opportunity to be a part of your journey and assist you in becoming the best version of you.

Jennifer Haggerty  | Positive Change Counseling Center

Jennifer Haggerty, MFT, Clinical Supervisor

MFT #99313

Jennifer (or Jen) is a Licensed Marriage and Family Therapist with over 8 years of experience working with children struggling with intense and frequent emotional and behavioral problems. Jennifer has a broad range of clinical experience working with children in the following areas: disruptive, impulse-control, and conduct disorders, depressive disorders, trauma and stressor-related disorders, and anxiety disorders. Jennifer works with clients and their families to process trauma, promote healthy communication, and strengthen the family unit. Jennifer also has experience running groups that focused on social skills, coping skills, anger management, and emotion regulation.

Jennifer utilizes a strength-based approach and offers a safe and non-judgmental space. She works closely with her clients to develop realistic and achievable goals as she wants her clients to be successful. Jennifer’s experience working in a residential program has allowed her to support children and family’s mental health treatment in a variety of capacities, further deepening her understanding of the complexities and vulnerabilities involved in mental health care. Jennifer has received training in CBT, Trauma-Focused CBT, Motivational Interviewing, Play Therapy, and DBT. She also incorporates other modalities such as Solution Focused, Client Centered, and Art-Based therapeutic interventions. Jennifer provides trauma-informed and culturally competent therapeutic services, takes a creative, understanding approach with all her clients, and supports her clients in deepening their personal exploration.

Jennifer received her Bachelor of Arts in Psychology from San Diego State University and her Master of Arts in Counseling Psychology from National University.

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Carol Dawidowicz, MFT, Senior Clinician

MFT #49433

Carol Dawidowicz is passionate about helping people improve their well-being and relationships. She has been working as a therapist with children, teens and adults since 2005. Carol started her counseling career at a non-profit agency serving at risk youth. Carol has over a decade of experience working with military service members and their families. She supports clients dealing with anxiety, depression, trauma, family of origin issues, grief & loss, separation & divorce, issues of identity/self-esteem, and relationship problems. She also works with couples facing a variety of challenges including parenting issues, infidelity, communication difficulties, intimacy problems, conflict and domestic violence.


Carol received her undergraduate degree in Psychology from the University of Virginia in 2000. She obtained her graduate degree in Marital and Family Therapy from the University of San Diego in 2006. Carol has taken advanced training in Emotionally Focused Therapy for couples. She also has completed training in yoga, Mindfulness, Cognitive Behavioral Therapy and multiple anxiety treatment related programs.


Carol values diversity and strives to understand the unique needs of each individual. She helps clients identify their strengths and develop the tools and relationship skills to lead a more productive and satisfying life. 


Katrin Seifert, PsyD, Clinical Director

PSY# 26257 (Not currently accepting new clients)

Katrin Seifert PsyD (pronouns: she/her) is a licensed psychologist, EMDR-trained and board certified in Clinical Health Psychology, whose areas of interest and expertise include the effects of long-term trauma and stress, working with LGBTQ+ individuals, culturally diverse populations, and adolescents, and health psychology. Dr. Seifert practices from a culturally-sensitive, anti-racist perspective.  


Dr. Seifert completed her graduate training at the University of Denver, Graduate School of Professional Psychology. For over 10 years, Dr. Seifert worked in primary care settings, alongside medical doctors, focusing on providing short-term interventions to help people of all ages, addressing a wide array of physical, mental, and behavioral concerns. Dr. Seifert has been in leadership roles, overseeing a Behavioral Health team and a psychology training program at a community health center, and has also focused on providing supervision and training to behavioral health and medical learners.


Dr. Seifert welcomes people of all ethnicities, races, sexual orientation, gender identity, class, and education level. Dr. Seifert does not adopt a one-size-fits-all approach to therapy, and instead tailors her work to the individual and their preferences; however, Dr. Seifert is comfortable applying interventions from Cognitive Behavior Therapy, Acceptance and Commitment Therapy, Dialectical Behavior Therapy, and EMDR. Dr. Seifert aims to help each person make progress toward their goals by understanding that person’s perspective as well as sharing her own insights, observations, and strategies.

Jennifer Lundy-Aguerre  | Positive Change Counseling Center

Jennifer Lundy-Aguerre, MFT, CEO

MFT #42025 (not currently accepting new clients)

Jennifer specializes in treating adults with a variety of anxiety and depressive disorders. She will work with you to address past trauma, decrease work-related stress and teach you skills to help get "unstuck" with challenges you may be facing. She also does a great deal of work with couples and families to address common relationship concerns, such as: communication, conflict resolution, trust, intimacy issues and financial concerns. Relationship therapy focuses on providing couples with skills to help increase trust, gain intimacy and strengthen their overall relationship. 

One of Jennifer's passions includes working with expectant and new parents on their journey as they work toward creating a special space for the newest member of their family.  As an advocate for parents, Jennifer believes in the importance of understanding your rights during pregnancy, childbirth and beyond in providing the care you feel is best for you and your family. Jennifer is a Certified Facilitator for Gottman’s “Bringing Baby Home” curriculum.

Jennifer received her Bachelors degree in Psychology from the University of Iowa in 2000 and a Masters of Arts from the University of San Diego in Marital and Family Therapy in 2002.  Jennifer founded Positive Change Counseling Center in 2006 and with over 15 years of experience she continues to provide effective treatment to her clients. She has worked as a Research Therapist at the Veteran's Medical Research Foundation in La Jolla providing evidence-based Prolonged Exposure therapy to U.S soldiers returning home from combat who are challenged by Post Traumatic Stress Disorder from combat and other traumatic events. Success rates are high in minimizing and eliminating issues such as increased fear, depressed mood, flashbacks, and poor concentration related to traumatic events including physical violence, sexual and combat trauma. Jennifer's background also includes human relations and diversity trainings, supporting survivors of domestic violence, providing in-home services for at-risk youth, facilitating anxiety support groups and providing residential treatment for adults with chronic mental illness and addiction.

Stressed Woman

Psychotherapy for Individuals, Couples, and Families

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