Connecting Behavioral Services, Vocational Services and Mental Health Services

My name is Mark Holton. Welcome to Positive Behavioral Services of the Four Corners LLCI am a Licensed Marriage and Family therapist  (LMFT), Board Certified Behavior Analyst (BCBA) and hold a Masters Certification in Rehabilitation Counseling with over 20 years of experience in the clinical, behavioral and vocational services business

Positive Behavioral Services of the Four Corners is a Southwest Colorado based company founded upon the science of Behavior Analysis as the chief means of improving the lives of individuals with Autism and Developmental Disabilities. We are dedicated to the ethical and effective practice of Applied Behavior Analysis for children and young adults with developmental disabilities. Our staff is made up of BCBAs, Masters prepared practitioners in both ABA and Special Education as well as Bachelors prepared BCaBAs,  Registered Behavior Technicians, Employment Specialist, and Job Coaches..

Mark’s Credentials

Education & Certifications
  • BA, Psychology, University of Dayton, OH, 1995
  • MA, Applied Spiritual Psychology, University of Santa Monica, CA, 1999
  • MA, Counseling Psychology/ Family Systems, University of Santa Monica, CA, 2001
  • MA, Rehabilitation Counselling Certification – University of Arkansas, 2003
  • LMFT, Licensed Marriage and Family Therapist # 738, CO 2006
  • BCBA, Board Certified Behavior Analyst # 1-18-30619 Colorado University, 2016,
  • Company Owner – PASA- HCBS WAIVER –2016  Mark Holton, Positive Behavioral Services of the Four Corners LLC. Programed Approved Service Agency- Colorado Department of HealthCare Policy and Financing. Behavioral Assessment, Consultation and Counseling business.
  • Company Owner – 2018 – EPSDT Pediatric Behavior Services for children with Autism and other lifespan diagnosis.
  • EMDR I and II Certification 2008
  • Hakomi- Mindfulness Counseling – Basic Training, 2010
  • EMDR Advanced Training Certifications in Somatic Interventions, –2013
  • EMDR Advanced Training Certifications with Children and The Art of Psychotherapy, 2014
  • Florida Supreme Court Certified Family Mediator –2018
  • Florida Certified Parent Coordinator – 2018
  • Certificate VB Mapp Assessment for children- 2018
  • Certificate Pivotal Response Treatment for children – 2018
  • Family Mediation Certification- 2018
  • Parent Coordination and Advanced Parent Coordinator Certifications – 2018
Jessica Spencer
Special ED Director
Cortez, CO 81321
Bruce Haring, LPC
Ragsdale and Associates
Durango, CO 81301
Alan Cook, LPC, CACIII
31 Ash St.
Cortez, CO 81321

Judge Irene Sullivan, Retired, 6th Judicial Circuit, Pinellas County – 727-415-7377 – irenesullivan36@tampabay.rr.com

Lisa Negrini, LCSW (Chief Operating Officer, Family Study Center, USFSP) – 727 -215-8529 – lnegrini@usfsp.edu  

Brendan McCollm, Psy. D. – Carter Psychology Center, – 941-753-0064                         

Kathy Rosenberg- Girls Tennis Coach, Riverview Highschool – 941-915-7213 – Rosey5@comcast.net

Holly Holton – Boys Tennis Coach – Riverview Highschool – 941-809-8050 – hhmoore3@gmail.com

Articles of Interest


Thoughtful and precise. Interventions have worked wonders for my clients. Behavior plans are individualized, evidenced based and effective

Claudia Beetem

Host Home Provider

PBS of the Four Corners was an incredible asset to our classroom. I referred three students to Mark, and his interventions provid to be very effective. Mark was able to give immediate attention to a student in need which changed his attitude and outlook and enabled him to focus on his school work

K. Lein

k-1 teacher

Their customer services and vocational services have been great. They have helped me strengthen my confidence with resume building and getting ready for interviews.


Vocational Services Client

Friendly and knowledgeable. He provided down to earth behavioral services that really do provide positive benefits for all my clients. My clients are a great judge of character and they have all chosen PBS of the 4 corners to work with for their future services.

Mike Gabrel

Host Home Provider

PBS of the Four Corners provided counseling for a student in my class this year and did a great job teaching him strategies to control his actions. The student always enjoyed his time with Mark!

L. Mendoza

3rd Grade Teacher

PBS of the Four Corners was a positive liaison between the parents and the school. They provided helpful suggestions and positive feedback to the students and staff. It was great to have their expertise and support.

C. Lancaster

4th Grade Teacher

PBS of the 4 Corners Vocational Team helped me apply for and secure my job with City Market. I have been working there successfully for 5 month now. I really like my job and I feel connected to my community while working. Thanks PBS!


Vocational Client