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.

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. 

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. 
Kim Kucera Photo

Kim Kucera, LPCC

Kim Kucera is a Licensed Professional Counselor Candidate. She has worked with adolescents and adults in private practice and inpatient/residential settings. Kim received her BA from the University of Nebraska-Lincoln with a major in political science and an emphasis in public administration. She obtained her MA in clinical mental health counseling from Colorado Christian University in 2023. Before becoming a therapist, Kim worked in healthcare in various administrative roles. While working with patients in hospitals and clinics she realized she was passionate about advocating for people who don’t have a voice. Kim works from a holistic, person-centered perspective based on the idea that every person is unique as is their ability to manage their own world. She has a niche interest in working with neurodivergent and autistic adult women.

In her spare time, Kim loves to spend time in her garden, taking care of her indoor plants, and hanging out with her family and four cats.


Rebeca Wright, LPCC

Rebeca Wright is a Licensed Addiction Counselor and a Licensed Professional Counselor Candidate. She has worked in a variety of settings including inpatient, intensive outpatient, outpatient, residential, detox, and a crisis center. Prior to her work as a counselor, she volunteered and eventually worked for an advocacy center for individuals with intellectual and developmental disabilities and discovered her love of the population.

She obtained her BA in Psychology in 2015 from the University of Northern Colorado. By 2017, Beca had obtained her certification as an addiction counselor and was working with clients who struggled with both addiction and mental illness. Beca earned her MA in Clinical Mental Health Counseling from the University of Northern Colorado in 2021. During that year she obtained her License as an Addiction Counselor as well as her License as a Professional Counselor Candidate. Beca favors a DBT approach, however attempts to be adaptable to the individual's needs. Beca is LQBTQ+ and neurodiverse affirming.

In her spare time, Rebeca is an avid DnD player and enjoys pet sitting for members of her community. Rebeca has an orange tabby cat named Chimew.

Cassidy Sigala photo_crop

Cassidy Sigala, MHA, Office Manager

Cassidy is our full time office manager and is likely the first person clients will communicate with at Insights.  She has a calm and friendly demeanor and is passionate about being in the helping field.  Cassidy comes to Insights with more than 15 years' successful experience in the medical field. She has recognized strengths in administrative procedures, management, solution driven problem-solving and trouble-shooting, staff support, and project planning/implementing practice procedures and systems to avoid problems in the first place. Cassidy completed a Master's degree in Healthcare Management, graduating with a 4.0 GPA.(University of Phoenix). She has strong written and computer skills with excellent working knowledge using both EHR and EMR systems for medical records management, as well as Microsoft Office.

In addition, Cassidy worked for a year as a Registered Behavior Technician (RBT) providing direct intervention to autistic children in an ABA center giving her a unique perspective and understanding of neurodiversity.

In her free time, Cassidy enjoys spending time with her husband, two sons, and three dogs as well as spending time outdoors camping, fishing, and making memories!


Cassidy Brown

Cassidy Brown, Practice Manager, MFTC

Cassidy Brown has two important roles with Insights. She is a Marriage and Family Therapy Candidate (MFTC) as well as our Practice Manager. Cassidy is an Oklahoma State University graduate with a Bachelor’s degree in human development and family science. She recently obtained her Master’s degree in marriage and family therapy through National University. Cassidy hopes to continue building her career as a Marriage and Family Therapist and to continue serving her community and bringing awareness to the need for accessible mental health services. Cassidy has worked in a private practice setting over the past year through her clinical internship where she worked with children, adolescents, and young adults. At Insights she primarily works with children, adolescents and young women, with a focus on improving relationships and communication by addressing individuals’ actions, emotions and perceptions as they relate to their relationship dynamics.

In her role as Practice Manager, Cassidy helps keep all wheels of the practice moving effectively and efficiently by providing support to both the clinical and administrative teams. She is an indispensable and integral part of the Insights Team and we are forever grateful for her expertise. Cassidy moved to Denver, Colorado in the summer of 2018 and enjoys spending her time with her family and her dogs.

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