Our Therapists

At Cathexis, we take seriously the need for an individualized approach to counseling. Therefore, we have assembled a clinical team of highly skilled therapists who incorporate a variety of clinical approaches and theory into their practice.


Due to an increase in demand for services, we currently have very limited availabilty for new clients; however, we will be happy to place you on our waiting list.   In order to do so, please follow the instructions on our Contact Page. Unfortunately, we cannot provide an estimate as to when services will be available.

Stephan Ackermann

Stephan Ackermann, LPC, MA, MBA


Stephan uses a person-centered approach to create a safe therapeutic process most relevant to the client.  Stephan integrates evidence-based treatments (CBT, EMDR, Mindfulness) and a depth-psychology approach in working with adults on issues related to life transitions, trauma, PTSD, anxiety, depression, grief and loss, as well as individuals seeking personal growth.  Stephan also works with couples in need of resolving conflicts and improving their relationship.


Stephan is a former vice president of the Southern Arizona Friends of Jung organization. In his work, Stephan promotes individuation, a process of transformation whereby the unconscious is brought into consciousness (dream analysis, sand-play, artistic expressions, active imagination) for an eventual integration of the psyche resulting in psychological health and somatic well-being.  Stephan is originally from France and had a distinguished business career prior to becoming a psychotherapist. Stephan cultivates many interests including transpersonal psychology, philosophy, comparative religion, and personal development.  Stephan joins Cathexis from the Tucson Medical Center (Peppi’s House – TMC Hospice) where he interned as a Grief Counselor.

Colleen Lally, MA, LPC


You feel stuck. This isn’t the life you pictured and your day-to-day existence leaves you feeling unsatisfied and looking for ways to escape. Despite your best efforts, nothing seems to create change. My hope is to help you build a life you want to be present in. I believe in a collaborative approach, beginning with meeting you where you’re at, and with you as the expert of your experience.


In therapy, I provide an individualized approach for the needs of each client. Together we will develop a plan of action to help you live a life that moves you towards what you value most. Aspects we’ll focus on will include skill building, effective communication, and increasing your engagement in activities that provide a sense of fulfillment.


Reconnect with your life, wake up with a sense of purpose and satisfaction, foster fulfilling relationships, and be present in your experience. Allow yourself the opportunity to connect with someone to help guide you through this process. Contact me today for a free 15 minute phone consultation to see if I’m the right therapist for you.

Jessican De La Ossa

Jessica De La Ossa, LPC, MSC, PhD


Jessica is a Licensed Professional Counselor specializing in helping clients improve their relationships with themselves and others — which ultimately enhances their overall quality of life. She uses an array of therapy methods to help clients discover something they never knew was there, in themselves and in their relationships.


She also works with clients experiencing grief, loss, anxiety, depression and big life changes. Drawing from her mixed educational background, she utilizes a tailored approach to help her clients feel empowered and excited about life again. She holds a Master of Science in Counseling from Prescott College and a Doctor of Philosophy in Human Geography from the University of Arizona.


In addition to her clinical work, Jessica has published works in the edited volume Psychoanalytic Geographies and the journal Emotion, Space and Society. She has presented research findings at national conferences and remains dedicated to bridging psychotherapy with insights emerging from psychoanalytic geography.

Priscila Matei

Priscila Matei, MA, LPC, CRC, CCTP


Priscila is a Licensed Professional Counselor and Certified Rehabilitation Counselor. She holds a Master’s degree in Rehabilitation and Mental Health Counseling from the University of Arizona. She has worked with patients in assisting with disabilities, vocational rehabilitation and support to address the psychological, behavioral, cognitive and social factors affecting the patient’s well-being.


Priscila integrates evidence-based treatments (CBT, EFT and Solution-focused), sandplay therapy, and psychodynamic approaches to working with late adolescence and adults on issues relating to phase of life problems, adjustment disorders, depression, and anxiety. She also utilizes specific mindfulness and relaxation techniques to address those concerns.

Traci Grabb

Traci Grabb, LPC


As a Licensed Professional Counselor, Traci provides therapy to adults, adolescents, and children. She sees her role as helping you feel better in the areas of your life that bring you anxiety and emotional pain. Whether that is from relationship difficulties, trauma, loss or stressful situations, Traci’s great passion is to work with each individual to uncover the deeper issues, to build on strengths and to provide new tools and the skills needed to improve their relationships and quality of life.


Her style is interactive, inspiring, supportive and solution-focused while providing compassion, understanding, empathy, and practical feedback in a relaxed environment. Having years of experience counseling clients from diverse backgrounds with a wide range of challenges, she uses a variety of modalities in a highly personalized approach tailored to each client.


Traci holds a Master of Mental Health Counseling and graduated from Argosy University. In 2016 she became a published editor of the book Identifying, Treating, and Preventing Childhood Trauma in Rural Communities (Advances in Psychology, Mental Health, and Behavioral Studies). Traci is a member of the American Counseling Association and its local branch, Arizona Counselors Association.


Making the decision to contact a therapist can be difficult and her goal is to make the process as welcoming as possible in a comfortable and calm office setting.

Bernadette Roumbos, MAPC, LPC, NCC, RD, PYT-C


Bernadette is a Licensed Professional Counselor, National Certified Counselor, Registered Dietitian, and Professional Yoga Therapist-Candidate.  She earned her Master of Arts in Professional Counseling from Liberty University and is currently in the Doctorate program:  ED.D of Community Care and Counseling with a specialization in Traumatology. Bernadette is a member of the American Association of Christian Counselors and the Academy of Nutrition and Dietetics.


Bernadette utilizes a collaborative, personcentered approach integrating Christ centered counseling with Biblical principles for mental and spiritual health. She provides a Christian based perspective for those seeking to integrate their Christian faith into the counseling process as well as evidenced based therapies and welcomes clients from all backgrounds.


Bernadette has over 20 years in the healthcare industry both inpatient and outpatient in a variety of roles. Her passion is to provide hope and healing from life’s challenges in a confidential, nonjudgmental, calm environment. Bernadette works with individuals, couples, and groupages 11 and up. She is trained in EMDR, Certified Clinical Hypnotherapy, Motivational Interviewing, Trauma Sensitive Yoga, Mindful Cognitive Based Therapy, Dialectical Based Therapy , Adlerian and pyschodynamic therapy. Bernadette works with people experiencing  anxiety, depression, PTSD, eating disorders, body image, chronic health issues, mood disorders, relationship struggles and personality disorders.

Joshua Crosby, MA, NCC, LAC


Understanding who you are and how you relate to others when life is chaotic and overwhelming can feel impossible. Some of us tend to just keep pushing on without taking into consideration our own feelings, experiences, and perspectives. If you know what that’s like, you’re not alone. I believe in the value of improving our personal understanding, how we see the world, and how we relate with others. In doing so, we can take a firmer grasp on life and become more intentional about how we want to move forward. What I find most beautiful about this process is that it’s truly unique for everyone.


In a therapy session with me, you will get safe, personalized treatment. I’ll draw from evidence-based practices and we’ll explore your experiences, values, identity, and how you relate to others. I’ll use a person-centered approach to ensure your unique needs are met and we’ll identify and develop your strengths to help you through your situation.


If you find yourself looking for help, consider stopping here and giving me a call. Your journey starts today.

Tatiana Thompson, MA, NCC, LAC

Tatiana is a Licensed Associate Counselor with a master’s degree in Counseling from the University of Arizona and a bachelor’s degree in Psychology from Arizona State University. She works with individuals, couples, and families with the understanding that personal problems don’t just happen on their own – they’re fostered by family and social systems. Tatiana works with LGBTQIA identified clients, also staying current and active on social justice matters. She helps clients get to the root cause of issues like anxiety, depression, OCD, PTSD, and trauma using a combination of Cognitive Behavioral Therapy (CBT), Eye Movement Desensitization and Reprocessing (EMDR), Solutions-Focused, mindfulness, ego-state and psychodynamic approaches.
Tatiana believes that each person can create the life they want with the right tools and healing. She specializes in helping clients navigate major life transitions and heal from past trauma. By creating a safe, non-judgmental space, you can explore your current situation and all the factors that brought you here, with the awareness that you can move in a new direction today.

Emily Viola, LCSW


Emily provides strengths based, person-centered, and trauma informed therapy. She primarily works with children, adolescents, young adults, and families. She focuses on addressing experiences of anxiety, depression and stress, particularly those that arise from concerns regarding life and family transitions, chronic illness, traumatic events, body image, and issues unique to LGBTQIA individuals. With a background in social work, Emily considers the environment and systems that may be contributing to a problem, including social justice issues such as racism, sexism, and ableism (among others) that intersect with mental health concerns.


Emily utilizes a combination of Cognitive Behavioral Therapy (CBT), Dialectical Behavior Therapy (DBT), Acceptance and Commitment Therapy (ACT), mindfulness, play therapy, art, and writing to meet individual needs. Emily strongly believes that being able to tell your own story and have it heard is an important part of healing. She sees you as the expert on your own experiences, desires, and needs and views her role as providing support and guidance through the healing process.

David Ochoa, MC, NCC, LPC

David Ochoa, MC, NCC, LPC


As a Tucson native, David has the privilege to have worked in direct support services in our community for over 23 years.  As a graduate from the University of Phoenix, he holds a Masters degree in Counseling, and is a Licensed Professional Counselor and National Certified Counselor.


David has had the opportunity to work with many children, adolescents, adults and families to find healing in their lives.  Because we are all unique, he works to tailor his approaches towards the needs of the individual or family, and offers support in whatever way they require while on the path to healing.


He looks forward to meeting and working with you on your journey towards change and healing.

Jessica Flayer, MA, NCC, LAC

Jessica Flayer, MA, NCC, LPC


In a world that is constantly moving, I believe it is helpful to have a safe place where you feel heard and supported. My aim is to assist you in identifying your strengths to improve your relationship with yourself and others. I believe your needs are unique which is why I use an integrative approach when working with children, teens, and adults. I provide strength-based interventions to assist you in uncovering your own resilience to manage challenges as well as to grow and improve your overall quality of life.


I specialize in working with those experiencing anxiety, depression, trauma, and adjusting to life changes. I draw from modalities such as cognitive behavioral, reality therapy, psychodynamic, and behavioral activation while also utilizing the lens of performance/sports psychology.


If you are seeking meaningful support or you are curious about how counseling may help you, I encourage you to call today as immediate appointments are available. Your path to healing and success can begin today!

Veronica Machado, MA

Veronica Machado, MA, LAC


Veronica is a Tucson native, and prides herself in knowing the culture, people, and issues relative to her hometown. She completed her Master’s Degree at Northern Arizona University in Clinical Mental Health, received her undergraduate degree from Prescott College in Human Development & Psychology, and holds a post-Master’s certificate from the University of Denver in Equine Assisted Mental Health. She is a firm believer that the relationship between client and therapist is key to successful mental health services, and feels that finding the right professional to work with is as important as the techniques utilized in counseling. Veronica is passionate about social justice issues, equality, family systems, cultural issues, and psycho-education, and utilizes a mix of evidence-based and alternative modes of therapy tailored to each client’s needs. Veronica believes that we all experience human suffering at some of points of our lives, and it is important to understand the client’s experience and create a safe environment in which they feel unconditionally accepted. As a counselor, Veronica feels it is her duty to help clients realize their own answers and dreams on their journey.

Kylee Palmer, Intern


Kylee is in the process of completing her Master’s Degree in Counseling from Grand Canyon University.  Kylee is passionate about inner child work, attachment work, improving communication within relationships, trauma work and holding a client in their experience. Her experience includes working in mood/trauma process groups for a residential program and is familiar and comfortable with DBT, CBT, providing psycho education, and group therapy.  We are excited to have Kylee as part of our Cathexis team.

Kammy Willems

Kammy Willems, LCSW


Kammy believes there are times we all need extra support to get through life’s challenges and she works to offer a safe and non-judgmental place where you can explore whatever you are facing.  Her approach centers around meeting you where you are, working together to help you develop new insight into yourself and your relationships, and to discover new ways to respond to life’s challenges.


Kammy is trained in EMDR therapy and specializes in treating trauma and other distressing life experiences, and the problems that often accompany it.  She also utilizes talk therapy, Dialectical Behavior Therapy (DBT), Acceptance and Commitment Therapy (ACT), Cognitive Behavioral Therapy (CBT), Solutions-Focused Therapy and incorporates mindfulness and relaxation.  Kammy works with adults 18 years and older on a variety of concerns including anxiety, depression, phase of life changes, trauma, grief & loss, and relationship problems.


Kammy is a Licensed Clinical Social Worker who is independently licensed in both Arizona and in the state of Texas, where she previously lived and worked.  She holds a master’s degree in Social Worker from the University of Texas in Austin and has over 15 years’ experience providing psychotherapy.

Dan Krepps, LPC, LISAC

Dan Krepps, LPC, LISAC


Dan holds a Masters in Community Counseling and is a Licensed Professional Counselor. Over the past ten years his background includes a variety of specialty areas including substance abuse, mental illness, trauma, EMDR, crisis resolution, couples therapy, self-esteem, fatherhood, process addiction and anger management. At the core of his values is providing clients with the best service possible tailored to their individual needs. Dan has worked in community based programs, gender specific intensive outpatient programs, and crisis centers. He believes in building on the strengths of his clients and providing services to the community rooted in compassion, individualized treatment and spiritual growth.

Arturo Hernandez, LAC


Arturo Hernandez is a Bi-lingual counselor (Spanish/English) that holds a Bachelor’s degree in Psychology from the University of Arizona and a Master’s of Science in Counseling from the University of Phoenix.  Arturo is a Licensed Associate Counselor (LAC) working on obtaining independent licensure. With close to a decade of experience, Arturo’s clincial career started in community behavioral health learning how to treat serious mental illness, addiction, trauma, anxiety, depression, relationship issues, and crisis intervention. 


Arturo believe that in order to resolve or lessen the effects of painful mental health symptoms, the client and therapist discuss and work together in understanding, developing skills for, and facing these issues in an open, non-judgemental and emotionally safe environment. The client later practices those skils outside of the therapeutic setting in order to become comfortable with being uncomfortable with emotions.  Arturo uses the Gestalt therapy approach, which emphasizes personal responsibilty and focuses upon the individual’s experience in the present moment, the therapist-client relationship, the environmental and social contexts of a person’s life, and the self-regulating adjustments people make as a result of their overall situation.  Arturo also uses Cognitive Behavioral Therapy (CBT) and Acceptance and Commitment Therapy (ACT) to encourage the healing process.

Becky Palmer

Becky Palmer MA, LAC, CRC, RYT


Becky is a Licensed Associate Counselor, Certified Rehabilitation Counselor, and a Registered Yoga Teacher. She holds two Bachelor’s degrees from the University of Arizona and a Master’s degree in Rehabilitation Counseling from The George Washington University. With a background in therapy and yoga, Becky tries to incorporate mindfulness whenever possible into all aspects of her work with clients and students. She aims to create a safe environment conducive to change, growth, and healing.


While it is her belief that mindfulness plays an essential part in the therapeutic process, Becky takes an integrative and creative approach to therapy, treating each individual with interventions best suited to their own unique experience. Becky has had the opportunity to work with individuals with disabilities in a vocational rehabilitation setting. She is also experienced in working with individuals adjusting to major life changes due to illness, existential uncertainty, or traumatic events, and those who are experiencing grief, loss, anxiety, and depression. She enjoys working with individuals of all ages, from young children to adults, as well as families.

Alaina Vega, MA, LAC


Alaina Vega attended the University of Arizona where she received a Bachelors Degree in Psychology and has achieved a Masters Degree in Professional Counseling from Grand Canyon University. Alaina has been working with children and adolescents for over 6 years in the behavioral health field.  Alaina started her internship at Cathexis in September of 2018 under the supervision of Tim Mills, LPC.


Alaina understands that searching for a therapist can be intimidating and difficult to do, which is why she aims to create a safe space to share openly and together explore the issues, experiences, and symptoms that are causing distress. She provides strengths based, person-centered and trauma informed therapy.

Rena Scharch, LMFT


e.e. Cummings said “It takes courage to grow up and become who you really are.”  Whether you’re single, in a relationship, a parent or friend we tend to carry around the past, letting it define who we are today–so often when our past dictates who we are in the present it doesn’t work.  There may be some parts of us who are still the child but we’ve grown up and with that we have to change.  Some find that difficult but it can be done!  Let’s differentiate between what’s worth keeping and what needs to change.  You’ll find that everything gets better as you become more authentic, less defensive, more grateful, less angry and more content with your life.


I am a Licensed Marriage and Family Therapist with over 25 years’ experience, working with a variety of clients who presented with anxiety, depression, anger, low self-esteem, grief and loss, phase of life issues, domestic violence and cancer. I am trained in Family Systems and we will explore your family of origin in our work together.  I also utilize other therapies that will benefit your therapy.  What’s best for you comes first.


My passion is to help people create change in their lives.  I will be your cheerleader, your safe person, and I will help you find the tools to be who you want to be and have healthy relationships.


Find the courage today to go forward.   If it’s anxiety, depression, relationship issues, anger, grief, or whatever it is that’s holding you back, it’s time to work on it.  Realize that what you want in your life is possible, you just need a little courage!

Michelle Bailey, LAC, NCC


My counseling approach is grounded in a humanistic and existentialist, strengths-based perspective. I integrate ACT, CBT, mindfulness, EMDR, narrative therapy and depth psychology with a person-centered focus. I work with each client based on their unique, individual needs mindful of trauma, attachment and intersecting identities.


I work with adults and my therapeutic interests include chronic illness, anxiety, depression, grief and loss, ADHD, adult adoptees, older adults and family caregivers.


I am a recent graduate of NAU with a master’s in Clinical Mental Health Counseling.

Jennifer Youngblood, CRC, LAC

Jennifer Youngblood, LAC  (Teletherapy Only)


I believe that vulnerability, authenticity, and compassion allow for the development of deep connections and self-assurance. My aim is to provide a safe and supportive environment for you to find strength and growth through hardship, acquire the tools for self-healing, and become your most authentic self.


I take an individualized approach to counseling and incorporate a variety of therapies such as Acceptance and Commitment Therapy, Cognitive Behavioral Therapy, Solution-Focused Brief Therapy, EMDR, and mindfulness.


As a Certified Rehabilitation Counselor, I understand the psychological and social aspects of disability and adjustment. I hold a Bachelor of Science in Psychology from Georgia College & State University and a Master of Arts in Rehabilitation and Mental Health Counseling from the University of Arizona.

Leah Chon-Lopez, MA, LAC


Feelings of frustration, disappointment, heartbreak, loneliness, stress, and other undesirable experiences may describe your position today. Though you’ve tried to fight against and conquer your trial, you’ve found yourself in the same or more difficult position than before. The trials you face have become a [seemingly] insurmountable mountain. My deepest hope is to help you scale your mountains.


My approach to therapy is first a person-centered one– this means I emphasize treating my clients with an unconditional positive regard, empathizing with them deeply, and that I myself am genuine through and through. I find that healing happens where trust, safety, and non-judgement abound, so I prioritize these virtues in each session. In addition to the person-centered approach, I practice Internal Family Systems Therapy (IFS), Cognitive Behavioral Therapy (CBT), Emotionally Focused Therapy (EFT), and play therapy. My use of evidence-based treatments and psychotherapy theories will depend on the unique story and situation of each client.  I enjoy working with people from all backgrounds, and will respect your values and beliefs.


For those interested in incorporating their Judeo-Christian faith into treatment, faith-based counseling is a passion of mine. My hope is to understand your faith and beliefs and to incorporate Scripture and prayer into treatment.


I invite you to reach out for a free 15-minute phone consultation to discuss the option of therapy for you. Instead of simply imagining what’s on the other side of the mountains you face, let’s have you choose what awaits you on the other side of the summit.

David Lewis, LPC, LISAC

Michele Harris, MC, BHT

Alex Wilkens, Intern

Tim Mills

Tim Mills, Chief Executive Officer and Clinical Director


Tim founded Cathexis in 2015 out of a desire to bring the highest quality of therapy services to the Tucson community and gold-standard training and supervision to therapists.  At the heart of this drive, Tim wanted to ensure that all members of the Tucson community would have the opportunity to receive services, and in that aim, he began forming partnerships with the AHCCCS and commercial health plan networks.  Additionally, he structured the business model to be able to keep private-pay rates below the community average.


Prior to Cathexis, Tim worked in the field at Intermountain Centers for Human Development as a Clinical Supervisor, Pantano Behavioral Health Services as Deputy Clinical Director, and at Presidio Counseling and Center for Life Skills Development as a Therapist.  Prior to his work in the field, Tim has worked in several different careers, including Community Relations for a local university, Technical Support for Microsoft, Branch Manager for a bank, and he served time in the United States Marine Corps.


Tim enjoys many hobbies, and in true ADHD fashion, constantly seeks new experiences and challenges in both his work and play.  He is blessed to be married to his wife, Susie, for over 20 years and together they have raised two wonderful children.