Markus Ketteler, MD, FERA, is professor of medicine and currently serves as the Director of the Department of General Internal Medicine and Nephrology at the Robert-Bosch-Hospital in Stuttgart, Germany. His research focus is aimed at the understanding of the pathomechanisms involved in extraosseous calcifications, and of phosphate and vitamin D metabolism with regard to cardiovascular disease in CKD. He has authored more than 200 peer-reviewed publications including in The Lancet, Journal of the American Society of Nephrology (JASN), Journal of Clinical Investigation, and Kidney International. Dr. Ketteler has acted as local, National, or European Principal Investigator in several clinical multicenter trials in the CKD-MBD field. He served on the editorial boards of JASN and Kidney International in the past, and is currently theme editor of Nephrology Dialysis Transplantation, acted as a KDIGO Work Group member on the CKD-MBD Guideline from 2006 to 2009, and co-lead the German Calciphylaxis Registry. Dr. Ketteler was council member and chairman of the administrative office of the European Renal Association–European Dialysis and Transplant Association (ERA-EDTA) (2012–2018). He acted as co-chair of the KDIGO Controversies Conference on CKD-MBD, which took place in Madrid in October 2013, and was appointed as co-chair for the KDIGO CKD-MBD Guideline Update 2015-2017 (publication in Kidney Int in July 2017). In 2016, he was elected into the board of directors of the Kidney Health Initiative (KHI), representing the ERA-EDTA for 3 years. For 2020 – 2022, he was further elected as a member of the KDIGO Executive Committee.