• My Staff

    My Staff

    Sierra Leblanc, AMFT

    Sierra is a Marriage and Family Therapist Associate #121035, who is working toward completing her hours for licensure in the State of California under the clinical supervision of Kelly Aguirre LMFT#93109.  She is passionate about helping you walk through the process of therapy. This includes navigating the barriers that are getting in the way of change and fulfillment in your life. Sierra works with clients from an empowerment perspective utilizing cognitive behavioral and solution-focused therapies. She is also a certified facilitator through Prepare and Enrich, a program designed to strengthen premarital and marital relationships. As an identical twin, Sierra also has a clinical interest in twin relationships and conflict resolution.

    Sierra graduated from Pepperdine University with an M.A in Clinical Psychology with an Emphasis on Marriage and Family Therapy. She has a Bachelor of Science degree in Finance and Economics from Grand Canyon University.

    Sierra’s approach is compassionate and collaborative, providing a supportive environment to identify and challenge the thoughts, feelings, and behaviors that may be keeping you stuck. Therapy is a journey toward reclaiming the authentic self and she looks forward to serving as a guide.

    Sierra is available to work with couples, individuals, adolescents, adults, and families.

    Fee per session: $130-$145 (Flexible fee upon availability)

    Phone: 323-457-6737

    Email: sierra@kellyaguirrelmft.com


    Marisa Moosekian, AMFT

    Marisa is a Registered Associate Marriage and Family Therapist #130804 under the supervision of Kelly Aguirre, LMFT#93109.

    Making meaningful changes in life can be difficult. We tend to stick to what’s familiar, sometimes leaving us stuck in places we no longer want to be. The path towards healing and growth can sometimes be overwhelming and confusing. I believe that often, the answer is already within us, but we may need guidance to view life through a new lens. I’d like to walk with you on your journey of expansion. I am here to help you access your potential and develop the tools you need to have more fulfilling relationships with yourself and others.

    I am a graduate of Azusa Pacific University’s M.A. in Clinical Psychology program with an emphasis in Marriage and Family Therapy. I work from a psychodynamic and trauma-informed lens, as I believe that long-lasting change requires understanding and healing from our pasts. As a humanistic therapist, I also believe that you are the best expert on yourself, and as such, I take a non-judgmental and collaborative approach in the therapeutic process.

    I am an LGBTQ+ affirming therapist and am interested in working with individuals struggling with anxiety and mood disorders, relationship issues, self-esteem, life direction, trauma, and issues surrounding sex and/or gender. As a Gottman Level 1 certified therapist, I also work with couples and have a special interest in working with premarital couples seeking to improve their relationship and build a strong foundation for a lifelong partnership.

    Fee per session: $100 (Flexible fee upon availability)

    Phone: 323-451-2055

    Email: marisa@kellyaguirrelmft.com


    Brittni Petrosy, AMFT/APCC

    Hi there!
    I am a Registered Associate Marriage and Family Therapist #128609 and an Associate Professional Clinical Counselor #11163 under the supervision of Kelly Aguirre LMFT#93109. I graduated from Azusa Pacific University with my M.A. in Clinical Psychology with an emphasis in Marriage and Family Therapy and my B.A. in general Psychology. I am passionate about meeting you where you're at and collaboratively walking along side you on your journey. This involves discussing the goals that you would like to achieve and the steps you would like to take to get there. My sessions are tailored to your individual needs and provide a safe time and space to process any thoughts, emotions, or experiences. I also facilitate a space for self-exploration to gain a better understanding of who you are and how you connect with others.

    I work with clients from a person centered and humanistic approach. I also utilize CBT, family systems, and psychodynamic theories. I value helping clients connect with their bodies by utilizing a variety of interventions. I am available to work with adults, adolescents, children, as well as families, and couples. I am Gottman Couples Therapy L1 trained and I offer sessions to couples from all walks of life.

    My goal as a therapist is to help you identify and understand what components are negatively impacting your well-being. My work involves compassion, empowerment, and support to help you overcome the obstacles that hinder you from moving forward.

    I would love to meet you where you’re at and help you work towards where you want to be. I know this step can be difficult, please don’t hesitate to contact me with any questions prior to starting therapy.

    Fee per session: $100 (Flexible fee upon availability)

    Phone: 626-708-0442

    Email: brittni@kellyaguirrelmft.com


    Brianna Winbigler

    Brianna is a Registered Associate Marriage and Family Therapist #131601 and Registered Associate Professional Clinical Counselor #11237 under the supervision of Kelly Aguirre, LMFT#93109.

    Everyone has the innate tendency to seek wellbeing. However, there are times in our lives when we get stuck on our journeys toward growth. We get caught in the storm of life and often don’t know how we got there. In the chaos, we struggle to find a way out because we continue to use old ways of being that no longer serve us. The truth is, everyone has the capacity to heal – we may just need someone on the outside to help us along the way.

    Therapy can be the beacon of light through which you find your way out of the storm. Together, we can explore your past to gain perspective, access your existing resources, and develop new skills. I believe that this work will empower you to lead your life with greater intention so that you may live a purpose filled life and develop healthier relationships with others and yourself.

    As an LGBTQ+ affirming therapist, I have experience working with queer and trans individuals. I work with individuals struggling with self- esteem and identity exploration, anxiety and depression, life transitions, and spiritual exploration. I am Gottman Level 1 certified and work with couples struggling with communication and boundary issues.

    Fee per session: $100 (Flexible fee upon availability)

    Phone: (818) 928-5125

    Email: brianna@kellyaguirrelmft.com