This research aims to gain new insight by exploring the thoughts, feelings and experiences of therapists working with clients who have autism. Three professional talking therapists participated in the study. Unstructured interviews were conducted and analysed using interpretive phenomenological analysis. Six main themes and 13 sub‐themes were found which include therapists’ validation of autism, how therapists integrated autism when addressing mental health problems, how their personal experiences of autism impacted on their work and how they experienced the situation in which autism emerges during the therapy. Helpful suggestions are made for clinicians, namely, to zoom‐in and zoom‐out of autism, hold the knowledge that people with autism process information differently, incorporate working with trauma, consider disclosing a personal connection to autism and consider carefully whether, or not, to tell a client that they may have autism.