Leadership team

Kelly Spratt

Kelly Spratt


  • Length of service at Buffalo Hospital: Since March 2019
  • Education: Bachelor's degree in management from Cardinal Stritch University in Milwaukee and a master's degree in health and human services administration from Saint Mary's University.

frederick gretchen140x200

Gretchen Frederick, RN, MA

director of patient care and quality

  • Length of service at Buffalo Hospital: since January 2005
  • Previous experience: Quality consultant for Allina Health regional hospitals and director of care management at Abbott Northwestern Hospital
  • Education: Bachelor's of nursing (St. Scholastica) and a masters in human service and health administration (St. Mary's University)

Joshua Shepherd

director of operations

Education: Bachelor's degree in psychology from the University of Minnesota and master's degree in healthcare administration from the Carlson School of Management at the University of Minnesota. He is a Fellow in the American College of Healthcare Executives.


Robert Mullaney, MD

director of medical affairs

  • Length of service at Buffalo Hospital: since July 2017

Kristin Denne

director of human resources

  • Length of service at Buffalo Hospital: Since February 2018
  • Previous experience: Joined Allina Health in 2013 as a senior human resources generalist in the Allina Health Group. 
  • Education: Bachelor’s degree in management with a human resources concentration (St. Cloud State University) and a master of business administration (Concordia University)

Sandie Matrella

director of finance

  • Length of service at Buffalo Hospital: Since 2014, first as finance manager and now finance director
  • Previous experience: 21 years at Mercy and Unity hospitals starting as a cost analyst and eventually becoming finance manager
  • Education: Associates of Business from Gogebic Community College, Bachelor Science/Finance from Michigan technological University
valerie enter

Valerie Enter

quality risk manager

  • Length of service at Buffalo Hospital: Since July 2000
  • Previous experience: Cardiac Services Supervisor, Excellian/IS Manager, and Safety and Quality 
  • Education: Bachelor’s degree in nursing from University of Phoenix, Masters degree in patient safety leadership from the University of Illinois – Chicago.
Ashley Andersen

Ashley Andersen

foundation senior development associate

  • Length of service at Buffalo Hospital: since July 2017
  • Previous experience: Event planner and development associate for Feed My Starving Children
  • Education: Bachelor of art in cultural studies (Roehampton University, London, UK)