Dr. Maslonka graduated from Wayne State College in Wayne, Nebraska with degrees in chemistry and biology. He earned his medical degree from Creighton University School of Medicine in Omaha, Nebraska. He completed his pediatric training at the University of Minnesota, both in Pediatrics and Pediatric Critical Care Medicine. Following fellowship, he worked in the PICU at Children's Hospital of Austin (Texas), where he served as medical director of respiratory care.

Dr. Maslonka has served at Children's Hospital of Minnesota as medical director of Respiratory Care from 2002 until 2006, and currently is medical director of the PICU and Intermediate ICU at Children's Hospital of Minnesota - Minneapolis.  Special interests include the care of the chronically, critically ill patient, RSV disease in the PICU and a variety of patient safety issues associated with pediatric critical care.  His past research activities have included partial liquid ventilation, and serving as site director of the Partial Liquid Ventilation trial in Austin, Texas.  However, his passion remains at the patient's bedside, caring for the critically ill child and their families.

Dr. Maslonka and his wife, Darla, live in Woodbury, MN with their 3 children.  The Maslonka family is actively involved in their church.  Much of their free time is centered around their childrens' school and sports activities.  They enjoy seasonal outdoor sports in Minnesota.