Our Providers & Staff


Dr. James Poysky, Ph.D.

Provides evaluation & diagnostic testing for children 2.5 yrs - 18 yrs, and parent consultation services. 

Dr. Poysky has a doctoral degree and has completed advanced training in neuropsychology / clinical psychology at top children's hospitals. He is licensed in the state of Texas and is an active member of many psychological organizations.

Dr. Poysky completed his undergraduate degree in Psychology at Seattle Pacific University. Seeking to increase his knowledge and expand his ability to help others, he attended the Graduate School of Psychology at Fuller Theological Seminary – the first private school to earn accreditation by the American Psychological Association. During his time there he earned a Masters degree in Psychology and a Masters degree in Christian Leadership, and completed clinical training rotations at the University of Southern California, UCLA, and a variety of other locations. Upon completion of his pre-doctoral internship at London Health Sciences Centre, he graduated from Fuller in 2002 with a PhD in Clinical Psychology.

Dr. Poysky moved to Houston to complete a 2-year post-doctoral fellowship in pediatric neuropsychology at Texas Children’s Hospital. Upon completion of this specialized training in 2004, he accepted a position at Texas Children’s Hospital as a clinical neuropsychologist, and joined faculty at Baylor College of Medicine as an Assistant Professor of Child Psychology.

Dr. Poysky opened his private practice, Katy Child Psychology Associates, in 2008 in order to offer the same quality care to patients in Katy and surrounding areas. In his clinical work, Dr. Poysky strives to obtain a broad perspective of each child’s strengths and weaknesses, rather than focusing solely on “problem areas”. He believes that parents are a vitally important part of the clinical and decision-making team, and that they are the ultimate experts on their child. Although correct diagnosis is important, he works to ensure that parents also have an understanding of what is causing their child’s difficulties, and the implications that this has for intervention.

Dr. Poysky lives with his family in Katy and has two children one of which has special needs. Having a child with special needs gives Dr. Poysky an even greater understanding of the unique challenges of special needs families as well as the issues and struggles that all parents face. He has a passion to work with parents as a team to help children reach their best potential.

Dr. Poysky also has a strong commitment to the community, and regularly participates in educational forums and presentations to parent groups on a volunteer basis at the local, national, and international level. He is internationally recognized as an expert on muscular dystrophy, and is chair of a muscular dystrophy expert panel coordinated by the Centers for Disease Control and Prevention (the CDC). He is a contributing author to "A Guide to Duchenne Muscular Dystrophy".

James Poysky, PhD, is a Licensed Psychologist with the Texas State Board of Examiners of Psychologists (TX License 32839). For information on how to verify a license, please go to www.tsbep.texas.gov http:/ /www.tsbep.texas.gov . For more information on how to file a complaint, please go to the following page:

Dr. Casillas

Dr. Laurel Casillas Psy.D.

Post Doctoral Fellow, Supervised by James Poysky Ph.D

Provides evaluation & diagnostic testing for children 6 yrs - 18 yrs, and parent consultation services.  

Dr. Casillas is a provisionally licensed psychologist and is working as a post-doctoral fellow at KCPA under the supervision of Dr. Poysky. She completed her undergraduate degree in Psychology at the University of Houston. Following completion of this degree, she pursued further education at the University of Houston-Clear Lake where she received her master’s degree in Clinical Psychology, and her doctoral degree in Health Service Psychology (Combined Clinical/School).

During her training experiences, she worked with juveniles in detention, renal patients, chronic pain patients, adolescents with eating disorders, and in community mental health settings to address various concerns. Her research training focused on behavioral concerns and treatment outcomes for children, particularly those with ADHD.

Dr. Casillas strives to connect with children and their families to identify problem areas and improve overall functioning. She collaborates with her clients to identify values-based goals and assist clients in developing tools to empower them to address behavioral and relational concerns. While Dr. Casillas works from a cognitive-behavioral lens, she uses an integrative approach to tailor treatment for her clients with evidence-based interventions.

Dr. Casillas lives with her family in Katy, TX. She enjoys spending time with them and their numerous pets. Additionally, she enjoys reading fantasy books, playing video games, and crafting projects. 


Alyssa L. Muchaw, MA, LPC, ADHD-CCSP, NCC

Provides counseling and therapy services for children 4 yrs - 18 yrs. 

Aly Muchaw is a Licensed Professional Counselor, who believes in the healing power of relationships and is committed to creating a comfortable and trusting environment for all.  She respects and incorporates the cultural values of her clients while making every effort to empower and motivate individuals to reach their goals.  Aly believes in building a strong working alliance between the client and herself, which centers on honesty, authenticity, and education.  She enjoys teaching her clients how to use therapeutic tools for coping and problem-solving in order to reduce a client’s dependence on therapy as they encounter challenges later in life.  

Aly’s approach to counseling primarily comes from a reality/choice theory and family systems therapy perspective.  She believes in focusing on problem-solving skills and helping clients to make healthy choices so they reach personal goals and satisfy their basic psychological needs.  Aly incorporates a variety of therapeutic tools and strategies into counseling to develop the most effective and individualized method of treatment for each person.  For some younger clients, Aly utilizes a play therapy approach to help them process emotions and reach therapeutic goals based on their developmental level. Play therapy is a therapeutic medium for helping children express their feelings, improve communication, and resolve conflicts through the child’s natural ability and interest to play.  Aly regularly attends workshops in play therapy and sand tray interventions to further her education and bring new approaches to counseling.  Aly has experience working with clients facing varying severities of behavioral or mood regulation difficulties, neurodivergence and executive functioning difficulties, ADHD, depression, low self-esteem, anxiety, OCD, relationship/social issues, and difficulties adjusting to change.

It was in 2012 that Aly graduated from Baylor University with a Bachelor of Arts in Psychology.  She was the recipient of the 2012 Department of Psychology and Neuroscience Award for Outstanding Service in Psychology.  In her free time, Aly dedicated herself to volunteer work at the Waco Family Abuse Center along with participating in a number of academic honor societies and service organizations through Baylor University.  In 2016, Aly graduated from the CACREP-accredited Master of Arts program in Clinical Mental Health Counseling from Sam Houston State University.  During her graduate studies, she worked to provide individual, group, and family counseling services as well as play therapy at the SHSU the Woodlands Counseling Clinic.  

Prior to working in private practice, Aly worked in education as well as in residential treatment settings that specialized in child and adolescent populations.  When she was a supplemental instruction leader, Aly discovered the importance of teaching.  She found that through educating clients, they were able to make better choices and solve problems that led to greater success and happiness.  Furthermore, when Aly worked in residential treatment, she gained valuable experience in trauma informed care and case management.  She also developed skills for planning and implementing treatment goals for a variety of severe mental health and behavioral disorders.  

Aly has been a guest lecturer for the Excel Center of Katy, where she has spoken on the topics of separation anxiety, the effects of over-use of social media, and de-escalating behavioral outbursts in the school settings.  She volunteers with Elijah Rising, doing interventions in the North Houston and Katy areas.  She is a National Certified Counselor (NCC) and completed her ADHD-Certified Clinical Specialist Provider (ADHD-CCSP) training and certification in the fall of 2022.  Aly also has firsthand experience with raising children with special needs, as she has previously long-term fostered a set of siblings with disorders, such as Autism and ADHD.

Aly enjoys being with her family in Sealy, TX or at their family deer lease in Seguin, TX, where she also spends her time with exotic animals, and being outdoors. She currently lives in Brookshire, TX, where she enjoys raising her Great Dane, gardening, and doing crafts in her spare time.  


Elizabeth Forman, MA, LPC

Provides counseling and therapy services for children 3 yrs - 18 yrs. 

Elizabeth Forman is a Licensed Professional Counselor. Elizabeth has a Bachelor’s degree in Psychology from the University of Houston, Victoria. Continuing her education, she obtained her Master’s degree in Marriage and Family Therapy from Abilene Christian University, graduating with honors. Elizabeth completed over 600 clinical hours at Cy Hope Counseling Center during her practicum as a graduate student. During this time, Elizabeth has also been working in the field of education, teaching high school science.

Being a teacher and working with parents and students, Elizabeth realized many struggles that students and families sometimes faced could not be addressed in a classroom. Elizabeth wanted to help students and families develop skills to cope with common pressures that children and teens struggle with on a daily basis. She believes a person’s overall health is tied to their mental health and her focus is to help children and families work towards optimal health. Elizabeth’s experience in teaching has had a positive impact in her therapy style, helping her to connect with children on their level, which plays a key role in positive outcome of therapy.

Elizabeth lives in Katy with her husband. She has three adult children, two still in college. Elizabeth has many hobbies, but reading, cooking, and fishing are at the top of the list. Family is very important to her and spending time with them is her priority.


Sarah Joyner, MA, LPC, NCC

Provides counseling and therapy services for children 4 yrs - 18 yrs. 

Sarah Joyner is a Licensed Professional Counselor.  Sarah obtained her Bachelor’s Degree in Psychology from Sam Houston State University in 2016 and later obtained her Master’s degree in Clinical Mental Health Counseling from Sam Houston State University in 2019, specializing in Play Therapy. During her time as a student, Sarah worked as a preschool teacher and completed her practicum at Cy-Hope Counseling Center working with children, adolescents, adults, and couples.

As a counselor, Sarah’s hope is to help facilitate for her client’s increased levels of independence, self-esteem, and confidence that can lead to a healthier and happier lifestyle. Sarah likes to incorporate Person Centered Therapy, Cognitive Behavioral Therapy, and Strength Based Approaches depending on the client’s needs. Depending on the developmental level and age of her clients, Sarah uses her background in play therapy to help clients process and cope with emotions.

Sarah grew up in Northern Nevada, but loves everything about Texas from the beautiful weather to the tasty BBQ. Sarah is married, and some of her hobbies include traveling, biking throughout Houston, and spending time with family and friends.


Diana Piquet, MS, CAIP, LPC Associate, Supervised by Courtney Suddath

Provides counseling and therapy services for children 8 yrs - 18 yrs. 

Diana Piquet is a Licensed Professional Counselor-Associate who has a passion for working with young people. Diana has over 10 years experience working with children and adolescents as a teacher, and more recently as a high school counselor. Her goal is to help children and teens gain the confidence they need to cope with life’s challenges today and in the future. She is invested in helping youth work through common struggles such as anxiety, depression, negative self-esteem, academic pressures, anger, fears, grief, and family/friendship/relationship issues.

Diana likes to tailor her approach specifically to her clients. She incorporates Cognitive Behavioral Therapy (CBT) to help clients understand the link between their thoughts and actions, and works collaboratively with them to reach their personal goals. She also uses Acceptance and Commitment Therapy (ACT) to help children expand their psychological flexibility and what they choose to focus on.

 Diana believes everyone has strengths they can build upon while also learning from areas of weakness. She seeks to improve confidence and resiliency by equipping clients with tools to effectively navigate life’s ups and downs. Diana is bilingual in Spanish and English and looks forward to building trusting relationships with children and their families.


Nathalie Morton - KCPA Office Manager 

Nathalie moved to Katy, Texas from the midwest and has been with KCPA since 2016. Nathalie manages all phone calls and emails as well as scheduling for all providers. She is in the office Monday- Friday 11am- 5pm.  She and her husband David have 3 grown children. 


281-829-1599 or [email protected]


Administration Availability - (Clinician hours will differ)


11:00 am-5:00 pm


11:00 am-5:00 pm


11:00 am-5:00 pm


11:00 am-5:00 pm


11:00 am-5:00 pm