Mark Weber is a Nurse Practitioner in the Pediatric Intensive Care Unit at the Children’s Hospital of Philadelphia (CHOP) and a Clinical Instructor at the University of Pennsylvania School of Nursing. He specializes in vascular access, arterial line injury prevention, and point-of-care ultrasound (POCUS) in critically ill children. A Fellow of the American College of Critical Care Medicine, he has received multiple honors including the Sonosite Ultrasound Equipment Grant and the SCCM Presidential Citation. Mark leads pediatric ultrasound education nationally and has authored numerous publications advancing pediatric critical care.