Directory Practitioner Directory Advanced Practitioner Stephen Williams Stephen Williams About me and my practice I have over 10 years experience within the substance misuse field, working with a variety of addictive behaviours, I work with both individuals and couples. I offer a safe non judgemental space where all topics, concerns or issues are welcome. Experience I have worked in a number of substance misuse settings community and inpatient. Recently as the Substance Misuse Clinical Specialist within the Assertive Transitions Service my main responsibilities are to, develop treatment pathways with local substance misuse services across Nottingham City, Nottinghamshire and Derbyshire. Identify appropriate substance misuse support and recovery communities and provide specialist substance misuse support to individuals accessing the service.