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About Our Therapists

About our Founders


Tawna Ledesma, M.Ed., L.P.C.  Co-Founder


     Ms. Ledesma earned her M.Ed. from the University of Missouri Saint Louis in Counseling.  She started in the field working for an independent non-profit agency providing family-centered therapeutic services to children, adolescents and adults.  In 2003, she co-founded Collaborative Counseling, LLC, a private practice guided by collaborative efforts between therapist and client in creating change and growth.  In her current practice, Ms. Ledesma provides psychotherapy to children, adolescents, and adults, working to ensure treatment meets the needs of each unique individual.  Ms. Ledesma's authentic, non-judgemental and interactive approach empowers people to change unhealthy patterns, enhance their relationships, and fully engage in their lives.


 Kelley Mount, Ph.D., L.P.C. Co-Founder


     Dr. Mount earned her Ph.D. in Marriage & Family Therapy from St. Louis University in 2003 and has a Masters Degree in Counseling from the University of Missouri St. Louis.  Dr. Mount has been in private practice since 1996.  She started Collaborative Counseling, LLC a small group practice in St. Charles, MO with Tawna Ledesma M.Ed., LPC in 2003.  She has specialized in the treatment of children, families, individuals and couples.  

     Dr. Mount has also been a consultant for the Ferguson-Florrisant School District in the Early Education Department for the past 14 years and is a Missouri State Approved LPC clinical supervisor.  Although not currently teaching, Dr. Mount has over 12 years of experience teaching counseling and psychology at the University level and has worked as an adjunct Professor at St. Louis University and Maryville University.  


     Dr. Mount has  a great deal of experience working with children, families, and couples. She prefers a family therapy approach with young children and often integrates play therapy techniques. She feels that it is critical to incorporate work with parents because therapy is short term and in her opinion, long term change that occurs at the family level can be more powerful.    Her other practice interest is working with couples.  She enjoys working with couples who are interested in resolving a particular issue, or would just like to improve the overall quality of their relationship.  Counseling can be an effective way to resolve conflict and improve your general quality of life.                                                           
     Personally, Dr. Mount is the mother of two young boys and has been married for the past 18 years.  



Our Therapists


Nancy Ash, M.A., L.M.F.T.

     Nancy received her Masters degree from Phillips Graduate Institute in Los Angeles, CA and has been licensed to practice as a Marriage and Family therapist since 1999.  Nancy specializes in adolescent, adult, couple, and family therapy. She integrates complimentary methodologies and techniques to offer a highly personalized approach tailored to each client.  With compassion, humor, and understanding, she works with each individual to help them build on their strengths and find resolution to a wide range of personal concerns and psychological issues.
     Among her areas of expertise are anxiety, depression, addiction, PTSD, adult incest survivors, adult children of alcoholics, relationship conflicts, parent child conflicts, blended family issues,
 premarital counseling, or simply coping with the stresses of daily life. Nancy helps her clients create more of what they want in their life; healthy relationships, meaningful time with family and friends, increased productivity at work, feeling comfortable in their own skin, and sustained peace of mind.

Katie Dorwart; M.A., L.P.C.

Every person deserves the chance to create happiness from within themselves. As the therapist, Ms. Dorwart works with the inner strengths of those individuals and help them navigate their life to become their truest self. Her therapeutic practice is based on the client's individual needs. She believes that there is no one model to fit all people and the therapy should be molded to the client's individual goals.

Ms. Dorwart has experience working with children (9+), adults, couples, and group therapy. Her interests and involvement working with such issues include: anxiety, depression, adult and child trauma, marital issues, abandonment issues, co-dependency, grief, loss, stress management, relaxation techniques, and psychoeducational information.

Sheri Palmer, M.A., L.P.C.

     Sheri Palmer is a Licensed Professional Counselor who received her Master’s Degree in Counseling from St. Louis University.  She has been a practicing therapist with Collaborative Counseling, LLC since 2007.  Prior to this, Sheri has counseled individuals and families at C
oncordia Seminary, provided follow-up assessment for children and their families at the Children’s Advocacy Center of Greater St. Louis, counseled women in a senior religious community, and worked in a psychiatric hospital setting. She also has experience running both psychoeducational and therapeutic groups.  Here at Collaborative Counseling, LLC, Sheri provides psychotherapy to children, adolescents, and adults, using a strength-based approach to meet the identified goals and needs of each individual or family unit. Although Sheri often uses solution-focused and cognitive behavioral approaches, she also emphasizes the importance that the family system can play in each individual’s development.

Sheri Petruso, M.S.W., L.C.S.W.


     Sheri graduated from Washington University in St. Louis, MO with a Masters degree in social work; concentration in children, youth and families.  Sheri has practiced clinical social work for 16 years.  She uses an eclectic approach with clients maintaining a non-judgmental, teamwork perspective.  She often utilizes cognitive behavioral and solution-focused therapies to address her client's specific needs.  Sheri provides in office therapy but can consider in home therapy under certain circumstances.

Deanna Murray M.Ed., L.P.C., CEAP


       Deanna received her Masters in Education in General Counseling and is a Licensed Professional Counselor and is also a Certified Employee Assistant Professional.  Deanna works full-time at Magellan Health Services as an EAP Consultant.  Deanna has over 20 years of mental health experience.  Deanna’s emphasis is working with children and adolescents; using a multi-faced approach by using play techniques to help the child feel safe and comfortable to work towards the identified goals. Deanna is experienced in Critical Incident Stress Management and is ICISF Certified.  She is also a member of the American Association of Christian Counselors.


Mary Anne Potts M.A., L.P.C.

     Mary Anne Potts, MA, LPC has worked with adults, adolescents, children, and families on a variety of issues including life transitions, addiction, grief, anxiety, depression, and behavior issues.  She is currently in the process of becoming a Certified Trauma Specialist through the National Institute for Trauma and Loss in Children.   Mary Anne graduated from Saint Louis University with a Masters in Counseling and has been working at Collaborative Counseling for two years.  She is active in multiple professional organizations, including the American Counseling Association and the St. Louis Council on Child Abuse and Neglect.  Mary Anne enjoys working with families and individuals coping with life transitions.  



Collaborative Counseling, LLC

1600 Heritage Landing Suite 116

Saint Charles, MO 63303

(636) 345-1400




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