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About Our Therapists


Dr. Greer is a Licensed Professional Counselor Supervisor. She holds a Doctor of Philosophy in Family Therapy and a Master of Science in Counseling and Development from Texas Woman’s University.  Dr. Greer has worked with individuals, couples, families, adolescents, and children in casework and counseling  capacities since 1998. She has additional experience and training in hypnotherapy, mediation, parent facilitation, EMDR and family therapy. Her diversity in education, training, and direct practice enables her to work with all different age groups and issues. Dr. Greer's specialties include teenagers, young adults,  depression, anxiety, family/couple counseling, trauma and "high conflict divorces". Dr. Greer holds a strong  systemic view of working with individuals and families, believing that individuals are best understood within the contexts in which they live. She has extensive experience working with families navigating divorce and with children affected by their parents’ divorces. Additionally, Dr. Greer provides post-divorce parent facilitation, co-parenting, individual and family counseling to help families minimize conflict while adjusting to the post-divorce environment. In her research and experience, she has found that education and therapeutic intervention with high conflict families helps minimize the negative effects of divorce on all involved. Dr. Greer is currently in private practice at Greer & Associates Family Services, PLLC located in Denton, Texas. Dr. Greer is an part-time professor for the graduate mental health counseling program at Capella University. Previously, she was an assistant professor for the graduate counseling program at Texas Wesleyan University.  Dr. Greer has presented at State, National and International conferences and has several publications.


Kelbi Callaway is a Licensed Professional Counselor.  She received her undergraduate degree in Human Science at Texas Tech University and she has a Master of Science in Mental Health Counseling from University of North Texas. Kelbi currently works with clients of all ages and presenting issues. She specializes in relationship issues, spiritual issues, life transitions, anxiety, and enjoys working with the LGBTQ population.  Kelbi’s background includes over five years working in substance use treatment and two years working with collegiates. She is a registered yoga instructor and loves to incorporate mindfulness into counseling. Kelbi’s theoretical approach centers around Rational Emotive Behavior Therapy (REBT) and Dialectical Behavior Therapy (DBT), these approaches focus on our thoughts and beliefs regarding our concerns and use tools such as mindfulness, reframing, and disputation of beliefs to address problems. Kelbi believes that working in collaboration with clients and looking holistically at their lives can enhance the therapeutic experience and aid the client in reaching their goals. Kelbi likes to explore creative and innovative ways to solve problems and she loves incorporating her client’s  passions into the counseling process.

                                                                                                                                                                                   Hannah Grossman is a LPC. She completed her Bachelor's degree in Psychology at Colorado State University. Hannah continued her education at the University of North Texas where she received her Master's degree in Clinical Mental Health- Counseling. While she originally hoped to enter the research aspect of the field, Hannah learned quickly that her passion was in working with clients on a daily basis. Hannah has experience working with patients struggling with addiction, anxiety, depression, relationship conflict, and trauma. Hannah specializes in EMDR services   and incorporates EMDR into her work with clients struggling with trauma and grief.  Hannah assimilates Person-Centered Therapy, Cognitive Behavioral Therapy(CBT), And Dialectical-Behavior Therapy(DBT) into her counseling philosophy. 


 Shirin Khosravi is a LPC.  She completed her Bachelor’s degree in psychology   at UNT in Denton.  She continued her counseling education at Texas A&M   University-Commerce where she received her Master’s in Science in 2012 and   is working towards completing her Doctorate in Counseling in the Summer of   2019.  Shirin enjoys working with a wide variety of clients and has experience   working with clients struggling with trauma, depression, anxiety, and LGBTQ+.   Shirin specializes in Cognitive Behavioral Therapy (CBT), Trauma Focused-Cognitive Behavioral Therapy (TF-CBT), Cognitive Processing Therapy (CPT), and play therapy.                                          


Carly McGuffey is a Licensed Professional Counselor Intern, supervised by Sherri McCarthy, LPC-S. Carly graduated with a Master of Science degree in Counseling and a Bachelor of Science degree in Psychology both from Texas A&M University-Commerce. She most recently worked over 3 years at a non profit agency conducting crisis intervention for suicidal, homicidal and deteriorated individuals in various settings in the community such as hospitals, jails, and schools. While working on a crisis team, Carly helped clients achieve stability following their personal crisis event and prevent further crisis episodes through thorough case management and counseling. Carly also has experience counseling in a college setting and specializes working with adolescent, young adult and adult clients experiencing depression, anxiety, mood disorders, major life transitions, and relationship and identity issues. Carly has a holistic approach to therapy, with a humanistic and person-centered theory at the core of her therapeutic approach while collaborating closely with the client to draw on techniques that will help bring about personal awareness, growth and healing. Carly believes every human is unique and possesses the strength and ability within themselves to change while the therapist is present for guidance and support. With a holistic approach, she looks at each individual in all aspects of their life, including an emphasis on lifestyle and wellness, as mind and body affects the other. Carly strives to foster empowerment and authenticity in each client to help them grow and process complex emotions. Carly understands that change is a scary process therefore creating an empathetic, non-judgmental and warm environment is most important in helping clients feel welcome, understood, accepted and supported for change. 


Jamie Sarten is a Licensed Professional Counselor Intern, supervised by J. Dianne Bergere, LPC-S. Jamie graduated with a Master of Science degree in Counseling from the University of North Texas and a Bachelor of Arts degree in Psychology from Texas State University. Over the past four years she has held various roles in the school setting; including college and career adviser, an English teacher, and currently a Special Services Coordinator/Counselor. She has experience teaching and working with the Special Education population, including case management, the development of individual education plans and behavior intervention plans. Jamie has experience working with adolescents struggling with anxiety, depression, parent-conflict, ADD/ADHD, Autism, relationship and identity issues. She also has experience in group counseling, working with families, and adults. Jamie offers a solution-focused approach to therapy, helping clients focus on solutions to their problems and helps them set goals for themselves. In addition to solution-focused therapy, Jamie incorporates cognitive behavioral techniques that help clients develop healthy coping strategies to work through various challenges. She strives to provide a safe, warm, and collaborative environment when working with her clients.


 Allie Whistler is a Licensed Professional Counselor Intern supervised by Michele   Greer, PhD, LPC-S. Allie attended the University of North Texas and obtained a   Bachelor of Arts in Psychology. She continued her education at Texas Woman’s   University and earned her Master of Science in Counseling and Development. Allie   has experience working with clients of all ages but specializes in working with   adolescents. Allie specializes in presenting concerns including anxiety, depression,     eating disorders, substance use, identity development, grief, self-esteem, trauma,   life transitions, and relationships. Allie’s primary therapeutic theory is existential, an approach that focuses on concerns rooted in human existence. Allie believes conflicts are responses to encounters with the givens of existence: death, freedom, isolation, and meaninglessness. Allie loves to incorporate expressive arts in her practice as well.   Allie strives to make the counseling process a safe experience, understanding how intimidating and vulnerable it can feel for clients.


 Denny Taylor:  Don’t let the beard intimidate you, Denny Taylor is a big, friendly giant. Denny is an   LPC-Intern operating under the supervision of Dr. Michele Greer, PhD, LPC-S. Denny earned his master’s degree in Counseling at the University of North Texas in 2017 and graduated with his bachelor’s degree in Radio, Television, and Film from the University of Texas in 2012. When working with adults and adolescents, Denny operates primarily from a Gestalt therapeutic perspective; helping clients resolve “unfinished business” from their pasts so they can live at peace with their whole selves in the present. Denny also practices Child-Centered Play Therapy when working with children, providing the gentle and necessary therapeutic relationships that allow children to work through their issues in their own, unique ways. In addition to traditional talk-therapy, Denny loves engaging in experiential therapeutic modalities, such as expressive arts, guided imagery, and sand-tray therapy. Denny is accepting of all clients of all ages from all walks of life. Denny specializes in issues such as depression, anxiety, bipolar disorder, post-traumatic stress disorder, oppositional defiant disorder, panic disorder, trauma recovery, childhood abuse, issues affecting members of the LGBTQ community, loss of faith, cinematherapy, and identity development. In every session, Denny makes it his goal to listen to his client and understand the world from her or his perspective. One of Denny’s personal heroes is Mr. Rogers, and Denny aims to listen to every client with the care and acceptance that he grew up watching Fred Rogers model. 


Celia Pirouznia is a Licensed Professional Counselor Intern, supervised by Dr. Michele Greer, PhD, LPC-S. She completed her undergraduate degree in Psychology at the University of North Texas, as well as her Master of Science in Counseling and Development at Texas Woman’s University. Celia enjoys working with adults and adolescents of all presenting concerns, in addition to couples. She specializes in addictions, anxiety, phobias, self-esteem, and coping with chronic illness and pain. She also has extensive experience working with adults age 65+. Celia offers a hands-on approach to counseling, working collaboratively with her clients to achieve their goals. She incorporates a variety of techniques in session, including both Cognitive Behavioral Therapy and Dialectical Behavioral Therapy skills.


Haley Carroll is our Practice Manager and joined Greer and Associates in July of 2017. As a graduate of the University of North Texas, Haley holds a Bachelor's Degree in Communication Studies with a minor in Marketing. Prior to her time at UNT, Haley lived overseas in Vicenza, Italy while her husband was assigned with the 173rd Airborne Unit. Within her three years spent in Italy, not only did she travel Europe as much as possible, but Haley also worked as the USO Vicenza Assistant Manager where she focused on community outreach programs, hosting weekly events, and administration tasks. Over the past five years, she has worked with non-profit organizations to achieve fundraising goals, execute direct marketing initiatives, develop volunteer programs, and coordinate events. In her free time, Haley enjoys photography, baking, traveling, and spending time with her family.

Tristan Greer is one of our office coordinators. Tristan is currently studying psychology and computer science at UNT. He is a personable communicator and won't hesitate to start a conversation with you. However, Tristan finds pleasure in individual activities. Such as in building computers, coding software applications, playing video games, and solving three-dimensional puzzles. Once he graduates with his Bachelor's degree, Tristan will continue his studies in search of a Master's degree in Psychology. Nothing is off limits when it comes to conversation topics with this young man, so if you're curious, ask away! Tristan is a modest extroverted adventurist who has been Skydiving, cliff diving, is scuba and lifeguard certified, and occupies his free time with board sports including wakeboarding, wakesurfing, skateboarding, and snowboarding.

Alessandra Capasso is one of our coordinators in the office. She graduated with her undergraduate degree in Psychology from the University of Arkansas. Alessandra is currently pursuing her graduate degree at UNT. In her free time, you can find Alessandra doing yoga, reading, playing with her dog, and spending quality time with family and friends. She also enjoys writing for our blog about topics such as depression, anxiety, eating disorders, OCD, spirituality, and mood disorders.