Karolina Maria Stepien completed her training in Chemical Pathology and Metabolic Medicine in Greater Manchester. She trained at the Willink Biochemical Genetics Unit in Manchester, Adult Inherited Metabolic Diseases Departments in Salford, and Queen's Square in London. She worked in the National Centre for Inherited Metabolic Diseases in Dublin, and in 2018, she joined the Salford Royal NHS Foundation Trust team as a Consultant in Adult Metabolic Medicine. She is an Honorary Senior Lecturer at the University of Manchester. Her special interests include inherited metabolic diseases (IMD), endocrinology, and transitioning from pediatric to adult care. She has clinical responsibilities in both general metabolic and lysosomal storage disorders.