Petros Tatsios has been a PhD candidate since September of 2020 in the Physiotherapy Department of the University of West Athens, with No Decision 18/03.09.2020. Alongside, he is working in his private physiotherapy clinic in Glyfada.  On 21/10/2003 he graduated from the School of Health and Caring Professions Technological Educational Institute (T.E.I.) of Athens, Greece. His research and clinical interests are in the musculoskeletal field, and he specializes in manual therapy. On 07/02/2010 he graduated from the Scientific Subgroup "Orthopaedic Manipulative Physiotherapy OMT GREECE" of the Panhellenic Physiotherapy Association, and in 2013, he became a clinical instructor in manual therapy. On 04/05/2020 he graduated from David G. Simons Academy (degree) in dry needling. On 03/10/2020 he graduated (degree) from the Mulligan Manual Therapy program and became a "Certified Mulligan Practitioner". On 05/12/2017 he graduated (degree) in "Metabolic Disease of the Bones" Master of Science, from the National Kapodistrian University Medical School of Athens. On 15/01/2018 he graduated (degree) in "Education of Adult’s Instructor’s" in the National Kapodistrian University of Athens. On 27/01/2021 he graduated with a master of science in "Clinical Ergospirometry, Exercise Advanced Technology, and Rehabilitation" from the National Kapodistrian University Medical School of Athens. He is a member of the Laboratory of the Advanced Physiotherapy University of West Attica.