Meet The Team

Claire Dumke

Claire Dumke, Psy.D.

Dr. Claire Dumke is a Licensed Clinical Psychologist with over 10 years of experience working with children, adolescents and adults with Autism and other developmental disabilities. Dr. Dumke also treats clients with mood disorders, ADHD, trauma, behavioral issues and family issues.

Dr. Dumke received her BS in psychology from Colorado State University and holds both a masters and a Doctorate in Clinical Psychology with a focus on child and family studies from Alliant International University in Southern California.

Throughout her training and career, Dr. Dumke has worked with children and adolescents in residential treatment facilities and therapeutic group homes, as a Court Appointed Special Advocate (CASA) with children involved in dependency and neglect cases, as a psychotherapist at a mental health hospital in Southern California, as a counselor at a school for children and adolescents with mood disorders, learning disabilities, behavior problems, and Autism Spectrum Disorders, and was the covering psychologist for the Neuropsychiatric Special Care Unit at The Children’s Hospital for several years. Dr. Dumke has been in private practice in Denver since 2008.

Nancy Cason

Nancy Cason, Psy.D., BCBA

Dr. Nancy Cason is a Licensed Clinical Psychologist and Board Certified Behavior Analyst specializing in working with children, adolescents, and adults with Autism and other developmental disorders in Denver, Colorado.

She received her BA in psychology from the University of South Carolina in 1990, and then received her MA and Psy.D. in Clinical Psychology at the California School of Professional Psychology (1994; 1998).

Her professional experience includes work at residential therapeutic facilities, consultation to group homes and a day treatment program for adolescents and adults with Autism and other developmental disabilities. She helped to develop a school for children with Autism in Maui, Hawaii. Dr. Cason provided supervision of home and school based intensive Applied Behavior Analysis programs and was the Director of Family Services at the Center for Autism, Research, Evaluation and Service (CARES) in San Diego, California through 2004. She was also member of the multi-disciplinary diagnostic team at Creative Perspectives, Inc., in Englewood, Colorado from 2005 through 2009. Dr. Cason has provided clinical supervision to Masters and Doctoral Level therapists working with children with Autism. Dr. Cason has extensive experience in diagnosis, assessment, and treatment of Autism and other developmental disabilities.

Her professional accomplishments include publications as well as public speaking on topics related to Autism Spectrum Disorders. Dr. Cason has practiced in Denver since 2005.

Carolyn Black

Carolyn Black, Psy.D., LPC

Dr. Carolyn Black is a Licensed Psychologist and Licensed Professional Counselor. She enjoys working with, advocating for, and embracing neurodiversity, LGBTQ+ communities, forensic populations, and intersectional multiculturalism in all of its forms.

Dr. Black received her BS in Psychology and BS in Criminology (with a Minor in Computer Science) from Florida State University. She then received her MA in Forensic Psychology followed by her PsyD in Clinical Psychology (with a specialty in Therapeutic Assessment) from the University of Denver Graduate School of Professional Psychology. 

Originally from Miami, Florida, Dr. Black has worked within the Denver, Colorado community since 2016 in a wide variety of settings, including the legal system, private practices, therapeutic communities, and community mental health agencies. She has worked behind the scenes of clinics assisting with grant management, billing, and training, while simultaneously working as a clinician facilitating individual therapy, couples therapy, and evaluations. She has also been part of an interdisciplinary research team whose findings are moving towards publication, and she has presented at international conferences. 

Dr. Black loves cooking, the Internet, the outdoors, gaming, and her (very photogenic) pets: a dog named Raiden, a cat named Rex, and a ball python named Autumn.

Martha Bautist-Biddle

Martha Bautista-Biddle, Psy.D.

Dr. Bautista-Biddle is a Licensed Psychologist. Her professional passions include relational therapy, assessment, and group therapy with neurodiverse and LGBTQ+ communities. She has been trained in working with ASD, ADHD, personality disorders, OCD, and eating disorders.
Dr. Bautista-Biddle received her BAs in Psychology and Gender Studies at Smith College in 2016. She obtained her PsyD at the University of Denver Graduate School of Professional Psychology in 2022, with a specialty in couples and family therapy. 

Dr. Bautista-Biddle's professional experience has included exposure and response prevention, relational school counseling, community mental health, and program development. Prior to completing her internship, Dr. Bautista-Biddle was an extern at Insights, where she was trained in ADOS-2 administration, administered and interpreted assessment measures, and assisted in report writing, editing, and supervision; she is thrilled to be returning! Dr. Bautista-Biddle completed her predoctoral internship at Kaiser Permanente Colorado, providing therapy and WPATH assessments to members of the transgender/nonbinary community. 

Dr. Bautista-Biddle is passionate about partnering with, fostering connections with, and making a difference in the lives of the individuals, couples, and families she works with. She is especially passionate about helping adults feel confident in who they are, what they are experiencing, and the resources available to them that can help them thrive. Dr. Bautista-Biddle lives in Denver with her wife and their dog Theo and cat Mochi, and enjoys hiking, crafting, and baking. 

David Sherman

David Sherman, LPC

David Sherman is a Licensed Professional Counselor (LPC) with 5 years of experience. He has worked with children, adolescents, adults and families with diverse needs in various settings including hospital, residential, and outpatient care. David has worked with individuals with Autism Spectrum Disorders and other developmental disabilities, and enjoys working with individuals with ASD and their families to address emotional, behavioral and social communication needs.

David received his Professional Counseling MA from Lesley University in Cambridge, MA with a specialization in Expressive Arts Therapies. David combines therapeutic modalities such as CBT, solution focused therapy, and EMDR with expressive arts modalities like art, music and movement. 

Before becoming a therapist, David worked with farmers, chefs and the public as a sustainable food advocate. David is happy to have left NY winters behind to enjoy hiking and biking in CO. David is also a passionate visual and musical artist. 

Makyyah Dawkins

Makyyah Dawkins, MSW

Makyyah Dawkins is a pre-licensed Master’s Level Psychotherapist at Insights. He is passionate about working with youth, the LGBTQ+ community, neurodivergent clients, and expanding mental health services to diverse populations.

Makyyah received his Bachelor’s in Social Work (with a minor in history) from the Metropolitan State University of Denver in 2022. He then received his Master’s in Social Work with a concentration in clinical social work from the University of Kentucky in 2023.  He brings two years of experience in a school setting providing individual therapy, group therapy, and working with families.  Before working in a school setting, Makyyah worked with non-profits focused on substance abuse, human trafficking, and expanding community resources.  In his spare time, Makyyah enjoys watching movies, listening to music, and exploring what Denver offers.

Samantha Guntherless,

Samantha Gutherless, MA, LPCC

Sam Gutherless is a Licensed Professional Counselor Candidate. She has worked with young and middle aged adults in both private practice and in the court mandated setting. She is passionate about social justice advocacy and identity work. Sam received her BS from Black Hills State University in South Dakota with a major in psychology, minor in sociology. She completed her MA in clinical mental health counseling at the University of Denver. Before becoming a therapist, Sam worked as a psychometrist performing assessments on individuals of all ages with various diagnoses and presentations. From this experience, Sam recognized her drive for and love of working with people, and her passion for providing services to those in need. She prides herself in her ability to make strong connections with her clients and strives to adapt to each client's individual needs. 
Sam's hobbies include: board games, spending time with her dog, and rock climbing. 
kayla mccreadie

Kayla McCreadie, MA

Kayla McCreadie is a school psychology doctoral student at the University of Denver (DU), and is one of our doctoral externs at Insights, Colorado Assessment and Therapy. Kayla received her BS in psychology with a neuroscience focus and a minor in sociology from the Pennsylvania State University. She then received her MA in school psychology from the DU.

Kayla has worked as a full-time research technician at Penn State where she studied self-regulation strategies in young children. She has also worked in a variety of schools serving children and adolescents with autism, learning disabilities, and mood disorders, as a habilitation service provider for adults with intellectual disabilities Additionally, Kayla has been a researcher on teams studying children’s use of mathematical strategies and the effectiveness of small group reading interventions. Kayla is currently the graduate clinical supervisor at the University of Denver’s Counseling and Educational Services Clinic where she supervises graduate students in conducting psychoeducational evaluations. She is interested in how to best provide services and improve outcomes for individuals with intellectual and developmental disabilities.

In her free time, Kayla enjoys interval/circuit training, roller skating, aerial arts, dance, and playing with her cat, Ludo.

Molly Zall

Molly Zall, MS

Molly Zall is a first-year doctoral student at the University of Denver Graduate School of Professional Psychology and is part of the doctoral trainee program at Insights. She received her undergraduate degree in psychology from the University of Denver and her master's degree in special education from the University of Wisconsin- Madison. Throughout her training and career, Molly has worked as a special education teacher in the public school system. She has experience working with children and adolescents with Autism and other developmental, emotional, and learning disorders in an education setting. She has extensive experience with the special education process. When Molly is not studying or working, she enjoys cooking and spending time outdoors with her dog, DJ.  
Emily Johnson

Emily Johnson, MPH

Emily Johnson is a first-year doctoral student at the University of Denver Graduate School of Professional Psychology and is part of the doctoral trainee program at Insights. Emily enjoys working at the intersection of mental and physical health, specifically working with communities who have traditionally been marginalized by our healthcare systems. Emily received her undergraduate degree in psychology (with a minor in sociology) from Occidental College in 2015. After college, Emily worked at Stanford University’s School of Medicine investigating neurodegenerative diseases and working with chronic pain patients. This research experience strengthened Emily's passion around multidisciplinary care and also pushed Emily to seek more client-facing roles. Emily comes to Insights after working at a children’s community mental health clinic for the past two and a half years. In 2022, Emily graduated with her Master’s in Public Health from University of Southern California in hopes of bringing the public health lens to her work in mental health care. In her spare time, Emily enjoys running (although she is still getting used to Colorado’s elevation), reading, and cooking. 
Cassidy Brown

Cassidy Brown, Office Manager

Cassidy Brown is Insights’ full time office manager, without whom we would not be able to function! She is our clients first point of contact and handles all our scheduling, insurance questions, billing, and more.  She fields endless emails and phone calls and does it all with a smile on her face.  Cassidy is an indispensable and integral part of the Insights team and is excited to be able to utilize her diverse set of organizational and interpersonal skills to assist others in their therapeutic or diagnostic journey. She looks forward to talking with you!

Cassidy is an Oklahoma State University graduate with a Bachelor’s degree in human development and family science. She moved to Denver, Colorado in the summer of 2018 and is currently completing courses to obtain her Master’s degree in marriage and family therapy through an online program at Northcentral University. After graduation, Cassidy hopes to build her career as a marriage and family therapist to continue serving her community and bringing awareness to the need for accessible mental health services. 

Cassidy’s work history includes experience in working with children and adolescents. She was a summer school teacher in Oklahoma City, Oklahoma and held a child advocacy position during her summer internship program in Tulsa, Oklahoma. She also has 10+ years of experience in customer service through her retail management roles.

Astryd Hanlon

Astryd Hanlon, Client Care Coordinator

Astryd Hanlon is Insights’ Client Care Coordinator and is likely the first person clients will interact with when contacting our agency. She brings to Insights over 10 years within the management and administrative industry. Astryd enjoys working in the helping field and brings to Insights a positive and empathic demeanor. She has previous experience as the program coordinator for Meals on Wheels and as a substitute teacher. 

Astryd received her Bachelor’s of Science from the University of Texas El Paso as a double major in psychology and criminal justice and is in the process of pursuing her master’s degree in psychology. Astryd was born and raised in El Paso, Texas and then lived on the east coast for many years. She recently relocated to Denver and has been enjoying exploring all that Colorado has to offer by spending time outdoors with her husband. She also loves walking her dogs (Waylon and Maya) and cooking. She is an integral member of the Insights team.

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