Head of the Department of Paediatrics, Endocrinology and Diabetology with a Cardiology Unit, Medical University of Białystok (UMB) since October 2009. Since 2011, he has been full professor appointed by the President of Poland and since 2019 he has been a regular professor approved by UMB Senate. He is a specialist in pediatrics, endocrinology, diabetology, and paediatric endocrinology and diabetology, and completed specialty in pediatric cardiology. He is the Deputy Chairperson of the Board of Clinics and a member of the Commission for post-graduate education at the Children's University Clinical Hospital of Białystok. He is a lecturer and member of the presidium of the Human Development Committee of the Polish Academy of Sciences in the developmental age section. He also serves as a voivodeship consultant for paediatric endocrinology and diabetology. He is also a manager of specialization of three paediatricians and 8 specialists in paediatric endocrinology and diabetology. In the years 2009-2017 he was a member (two terms) of the Management Board of the Polish Society of Paediatric Endocrinology and Diabetes. On the behalf of the Association, he was a coordinator for multicenter clinical trials in pediatric endocrinology and diabetology in Poland (he develops collaborations in immunogenetic research in selected endocrinopathies in children and as part of the Strategmed-Cellular Therapy project for type 1 diabetes, based on the development of artificial regulatory lymphocytes CD4+CD25+CD127- and an anti-CD20 antibody, a randomized study), as well as scientific cooperation with European centres (participation in the European project on the identification of mutations in the IGF-1 receptor in short stature patients and thyroid dysfunction in newborns and infants of mothers with autoimmune thyroid diseases). He participates in post-graduate education (courses and internships) organised by the Postgraduate Medical Center in Warsaw (CMKP) in the field of paediatrics, paediatric endocrinology and diabetology. Lecture at initial and testing courses at Children's Memorial Health Centre (IP CZD) in Warsaw, within the framework of the CMKP, in the field of paediatric endocrinology, and at the Children's University Clinical Hospital of Białystok in the field of paediatrics. For many years he has been a Visiting Professor of Queen Mary University of London, Royal London Hospital, UK and Visiting Professor of FIRS Laboratories RSR in Cardiff, UK. He initiated a series of paediatric endocrinology and diabetology workshops addressed at general practitioners, paediatricians, internists, diabetologists and endocrinologists from Podlasskie Voivodeship. Since 2009, he has been an active member of the Coordination Team for the Growth Hormone Therapy at the Children's Health Centre (IP CZD) in Warsaw. In 2017, he received the TOP IF Award for 2016 of the UMB Rector. In 2018, in post-surgical thyroid tissues in children he detected expression of ZnT8 zinc transporter in follicular cells of thyroid and C cells based on WB, IF and RT-PCR- methods as a new autoantigen. Between 2001 and 2018, he was distinguished ten times and was awarded the Tomasz Romer award by the Polish Society of Paediatric Endocrinology and Diabetology for the best works in the field of pediatric endocrinology published in peer-reviewed journals (Pediatrics, Journal Endocrinological Investigation, Autoimmunity, Hormone Research). Between 2001 and 2018, he was distinguished on several occasions for scientific achievements with the teams of 1st, 2nd and 3rd degree of His Magnificence Rector of the UMB. In 2006, he received a Team Award of the Minister of Health for a series of 6 works on pathogenic factors in selected endocrinopathies in children, adolescents and adults with respect to immunometabolic disorders. Since January 2019 he has been the coordinator of the nationwide screening programme for early detection of type 1 diabetes in families with a history of this condition. Project coordinator as part of the European Society for Tyreology "Pysterological Assessments of antithyroid antibodies in newborns and infants of mothers with autoimmune thyroid diseases in pregnancy". Cooperation with FIRS RSR Lab. Cardiff, UK. In 2020, he won the KIDS competition for the best project in Poland concerning telemetry in children with arrhythmia. Participation in the projects: •Strategmed- “Cellular therapy of type 1 diabetes, based on the proliferation of artificial regulatory lymphocytes CD4+CD25+CD127- and an anti-CD20 antibody, a randomized trial" in collaboration with the Department of Clinical Immunology and Department of Paediatric Immunology, Endocrinology and Diabetology, Medical University of Gdańsk, in the period 2003-2005, head of research project KBN No 3PO5E00525 entitled: “Evaluation of selected subpopulations of lymphocytes, intracellular cytokines, adhesion and costimulation molecules and selected human thyroperoxidase epitopes in the tissue material in children and adolescents with thyroid developmental age diseases." • In 2010-14, a co-implementer of research project No N N407 14463, funded by the Ministry of Science and Higher Education entitled: "The effect of biological treatment on selected biochemical and ultrasound markers of the preclinical phase of the atherosclerotic process in children with juvenile idiopathic arthritis", in 2011-2014, the project manager approved by the National Science Centre (NCN) (No N N407 216640) entitled: "Analysis of apoptosis, number and function of regulatory T cells in the pathogenesis of thyroid autoimmune disorders of developmental age”. • On behalf of the PTEiDD, coordinator for the development of standards in thyrotoxicology. In October 2010, he was the main organiser of the National Paediatric Cardiology Meeting in Białowieża. In 2013, he was the editor-chief of the “Tyreologia wieku dziecięcego" of the Medical Tribune Polska publishing house. He participated in the creation of a handbook for specialization in pediatric endocrinology of PZWL 2018 publishing house, where he was a scientific editor of chapter 5 dedicated to thyroid diseases in children. On the other hand, in the "Diabetology of developmental age", edited by Małgorzata Myśliwiec, by the PZWL 2018 publishing house, he was a co-author of the chapters on the occurrence of the most common endocrinopathies with type 1 diabetes in children. In 2019, with Professor Andrzej Lewiński, he co-created the chapters in the Pediatrics Manual of the Medycyna Praktyczna publishing house on thyroid inflammation and pituitary resistance to thyroid hormones in children. He is a guest editor of two prestigious journals: Genes (IF-4) and IJMS (IF-5.9), special edition of Thyroid Diseases and Thyroid Cancer. The scientific achievements include a total of 177 publications, including 13 chapters in books and 441 convention communications. 97 original papers were published in journals with an Impact Factor index of a total of 225 points.