Who We Are


Practice Philosophy

Our experience enables us to offer effective outpatient, individualized, psychological care. WPS is an inclusive practice that treats a number of mental health disorders through counseling, provides sport psychology & performance enhancement consulting by a sport psychologist, and conducts psychological testing by a licensed psychologist. 


Treatment Focus

Our focus is to help individuals heal, energize, and become aware of their inner strengths. We achieve this by providing a neutral safe space, listening to your concerns, and customizing a treatment plan. 


Client Promise

We promise to be there for you every step of your journey. Our goal is to help you grow from your struggles, heal from your pain, and move forward to where you want to be in your life. 



Counseling Services

Sport & Performance Psychology

Psychological Testing

We provide counseling services for individuals, couples, and groups in all developmental phases of life. We also provide EMDR and NuCalm®.


Psychological Testing

Sport & Performance Psychology

Psychological Testing

We offer psychological testing for children and adults who may have ADHD, learning disabilities, Autism Spectrum Disorder, and mood disorders.


Sport & Performance Psychology

Sport & Performance Psychology

Sport & Performance Psychology

We use psychological knowledge and skills to address optimal performance and well-being of individuals and teams. 



Ricki Walker, PhD, HSP, CMPC

Dr. Walker is a Licensed Psychologist, National Registered Health Service Psychologist (HSP), Certified Mental Performance Consultant (CMPC), and an adjunct professor for the University of Denver Graduate School of Professional Psychology. She is also the Sport Psychologist for the US Men's Alpine Ski Team. She previously was the Associate Director and Training Director for the University of Oklahoma Athletics Department Psychological Resources for OU Student-Athletes (PROS). 

Dr. Walker earned her Counseling Psychology Doctorate from the University of Northern Colorado, her Master’s degree in Sport and Performance Psychology from the University of Denver, and her Bachelor's degree from Colorado State University.  Dr. Walker has worked in clinical and athletic settings since 2006. Dr. Walker was a Division I Athlete, played semi-professional softball, and was drafted to play in the professional league following her collegiate career.

Her areas of clinical focus include psychological testing, sport and performance psychology, EMDR, pain management, worker compensation, LGBTQIA concerns, relational distress, anxiety disorders, and grief.

Colorado License : PSY. 0004283


Allie Don Sing, MA, LPCC

Allie is a Licensed Professional Counselor Candidate (LPCC) in the state of Colorado. In addition, Allie is in the process of acquiring her designation as a Certified Mental Performance Consultant (CMPC). She is supervised by Dr. Ricki Walker. Allie earned her Master’s degree in Sport and Performance Psychology from the University of Denver and her Bachelor’s degree from Auburn University. She has experience working in both clinical and athletic settings. 

Allie currently provides services in a clinical setting in the Denver area treating all forms of eating disorders. During her time at DU, Allie worked within the athletics department as a graduate assistant. She also provided sport psychology services to elite athletes in both individual and group settings. Allie completed specialized LGBTQIA+ training from the University of Denver becoming part of the Queer and Ally Network on DU’s campus.  

Her areas of clinical focus include sport and performance psychology, anxiety disorders, depression, women’s issues, relational distress, identity and self-concept development, and life transitions. No matter the area of focus, Allie takes a client-centered approach and views individuals in relation to their environments in her collaboration with clients.

Colorado Permit:  LPCC.0018058 

Online Booking

Client Portal

Click here to fill out intakes, send secure messages, request appointments, download documents, and pay bills.

Contact Us

Drop us a line to find out more about our services or to schedule an appointment!

Dr. Walker accepts Anthem BCBS insurance.  All other insurance plans are not accepted, however Out-of-Network benefits may apply

*A quote of benefits and/or authorization does not guarantee payment or verify eligibility. Payment of benefits are subject to all terms, conditions, limitations, and exclusions of the member’s contract at time of service. It is recommended you call and receive a quote of your benefits before your session.

Walker Psychological Services, LLC

5684 South Prescott Street, Littleton, Colorado 80120, United States

phone: (720) 446-9438 fax: (720) 707-1632 **Email inquiries and phone consultations are not a guarantee of services and do not initiate doctor-patient relationship



Colorado Crisis Services

Colorado Crisis Services


 Virtual mindfulness and meditation classes for ages ranging from 8-18

Colorado Crisis Services

Colorado Crisis Services

Colorado Crisis Services


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