As of my knowledge cutoff in 2023, Phil Christie could refer to multiple individuals, and without additional context, it's uncertain which Phil Christie you're inquiring about. However, one notable Phil Christie is a clinical psychologist and specialist in the field of autism spectrum disorders. He has worked extensively in the diagnosis and support of children with autism and related conditions. Phil Christie has also been involved in training and educational roles, providing insights into autism to a variety of professionals and groups. He has contributed to several publications that explore the nature of autism and strategies for intervention. If you are looking for information on a different Phil Christie, such as an author in a specific genre, please provide more context or details.