Purpose This paper aims to present a working model for using experiential knowledge in the work of lived experience practitioners within the mental health field. Design/methodology/approach The working model is constructed from three key elements, namely, components of lived experience, the Library of Life Experiences and the NISE technique for sharing experiential knowledge (NISE: need identification; inner identification; sharing experiential knowledge and interpersonal encounter). Findings The model will be described, followed by central themes that emerged from a pilot course that was taught in Israel in 2019 to a group of peers working in the mental health system. The central themes were: developing peer identity; sharing peer language; internalizing the working model; understanding the peer role; and awakening social consciousness. Originality/value The original working model and training course were co-produced and co-conducted by peer specialists and mental health professionals, for the use of lived experience practitioners.