Schallert earned her bachelor's of science degree in nursing from Saint Louis University in 2007 and then worked concurrently in a St. Louis area hospital emergency department and at University Hospital in Columbia while working on her FNP (family nurse practitioner) degree at Saint Louis University. She completed that training in December 2010 and earned board certification in March 2011.

Schallert's accreditations include: basic life support (BLS), advanced cardiac life support (ACLS), sexual assault nurse examiner (SANE), trauma nursing core course (TNCC), and pediatric advanced life support (PALS), as well as competencies in electronic charting. She is currently a volunteer with the St. Louis Society for Children and Adults with Physical Disabilities and with Variety Club.