Mentina Therapies is led by Dr Jenny Lisshammar, a Clinical Psychologist and Doctor in Clinical Psychology, from the University of Oxford, United Kingdom. Dr Lisshammar is licensed to practice as a Clinical Psychologist with the Health and Care Professions Council in the UK, and with Socialstyrelsen in Sweden. She has undertaken an additional qualification as a Cognitive and Behavioural Psychotherapist, and is registered with the British Association for Behavioural and Cognitive Psychotherapists. She also holds a foundation level qualification in systemic family therapy.

Dr Lisshammar has practiced in a range of NHS and private therapy services, with children, adults, and older adults. She has a specialist interest and expertise in working with adults and children with acquired neurological injury, such as after traumatic/aquired brain injury, or spinal cord injury. 

She has additional specialist experience working with older adults with degenerative cognitive conditions such as all types of Dementia, as well as Parkinson's disease, and with cognitive impairment in other type of neurological conditions.