Meet Our Preceptors


Scott Ashby, PharmD, MHA
Clinical/Staff Pharmacist

PharmD Creighton University 1999, PGY1 Internal Medicine St. Joseph Hospital/Creighton Medical Center 2000, Master in Health Administration University of Phoenix 2007
Clinical staff pharmacist – Yavapai Regional Medical Center, Prescott AZ
Assistant Director of Pharmacy – Yavapai Regional Medical Center
Interim Director of Pharmacy – Yavapai Regional Medical Center
Clinical Supervisor – St. Francis Hospital, Milwaukee W
Preceptor: Oncology/Hematology


Michelle Brenner, Pharm.D., BCPS
Pharmacy Manager

PGY1 Residency Program Director
BS in pharmacy, University of Wisconsin (1994)
Pharm.D. University of Kentucky (1996)
BCPS (2001)
Clinical Instructor for University of Wisconsin, University of Minnesota, Concordia University and Midwestern School of Pharmacy.
Special interests include teaching, emergency and critical care medicine and perioperative pharmacology.


Brook DesRivieres, Pharm.D., M.S.
Ministry Saint Michael's Hospital
Director of Pharmacy (interim)

Ministry Health Care
Director, PGY2 Health System Pharmacy

B.S. Physiology, Michigan State University
PharmD, University of Michigan
M.S. in Health-System Pharmacy Administration, The Ohio State University
PGY-1 Residency, Grant Medical Center (OhioHealth)
Special interests include public health preparedness, risk management, and process improvement


Justin Guthman, PharmD.
Pharmacy Director for inpatient and outpatient pharmacy services at Ministry Saint Joseph’s Hospital and Ministry Our Lady of Victory Hospital.

Doctor of Pharmacy degree from the University of Minnesota- Duluth (2009)
PGY1 Community Residency at Froedtert Hospital, Milwaukee (2010)
PGY2 Health System Pharmacy Administration at Froedtert Hospital, Milwaukee (2011)
Preceptor for University of Wisconsin and Concordia University of Wisconsin
Special Interests include medication safety, management, transitions in care, ambulatory care, pharmacy practice model initiative (PPMI), and medication therapy management (MTM).


Stephanie Helgeson, Pharm.D.
Clinical/Staff Pharmacist

Pharm.D. from the University of Wyoming
Pharmacy practice residency at St. Joseph's Hospital, Marshfield, WI
Preceptor for the pediatrics rotation


Ben Jung, Pharm.D., M.S., M.P.A.
Clinical Lead Pharmacist- Surgical Services

Pharm.D., Drake University (2007)
M.P.A. Master in Public Administration, Drake University (2007)
M.S. in Health System Pharmacy Administration, University of Kansas (2009)
Health System Pharmacy Administration Residency (PGY1/2), University of Kansas Hospital
Teaching Certificate, University of Kansas (2009)
Special Interests include; teaching, mentoring, medication safety and critical care medicine.


Ashley Lorenzen, PharmD
Clinical/Staff Pharmacist

Assistant Professor of Pharmacy Practice – Concordia University Wisconsin School of Pharmacy
PGY-1 Pharmacy Residency at Aurora BayCare Medical Center in Green Bay, Wisconsin
Pharm.D. from The University of Missouri-Kansas City School of Pharmacy in Kansas City, Missouri
B.A. Chemistry from William Jewell College in Liberty, Missouri
Special Interests include: teaching/mentoring, leadership, emergency medicine, oncology, nutritional support and internal medicine


Debra Oldanie, PharmD
Clinical/Staff Pharmacist

PharmD., Purdue University (2012)
PGY1 Pharmacy Practice Residency, Ministry Saint Joseph’s Hospital (2013)
Special interests include nutrition support, pharmacokinetics, oncology, and infectious disease.


Codee Marie Peterson, PharmD.

PharmD-University of Minnesota 2010
PGY1 and PGY2 in HealthCare Administration Resident
Ministry Saint Joseph’s Hospital
Marshfield, WI


Brian Ruppel, Pharm.D., BCACP

BS Biology-University of WI—LaCrosse
PharmD-Drake Univ School of Pharmacy
APPE/IPPE and first year resident preceptor for Ambulatory Care rotations.
BCACP (2012)
PSW Leadership Conference participant (2009)
Dale Carnegie Leadership Academy Graduate (2013)


Karen S. Smith, R.Ph, MBA
Clinical/Staff Pharmacist

B.S. Pharmacy University of Connecticut
MBA in Health Care Administration from LaSalle University.
Residency in Drug Information, Fellowship in Antimicrobial Management at Hartford Hospital in Connecticut
Clinical Coordinator Abington Memorial Hospital, Pennsylvania prior to joining St. Joseph's Hospital in 2003.


Matthew J. Thill , Pharm.D.
Clinical/Staff Pharmacist

Pharm.D. from the University of Wisconsin-Madison
Completed pharmacy practice residency at Aurora Health
Care in Milwaukee, WI.
Preceptor for the Medical ICU rotation.


Tyler Van Schyndel, PharmD
Clinical/Staff Pharmacist

BS in Pharmacology-Toxicology from the University of Wisconsin, Madison (2007)
PharmD from the University of Wisconsin, Madison (2011)
Teaching Certificate from Concordia University (2012)
Completed PGY1 Residency Training at Froedtert Hospital in Milwaukee, WI and PGY2 Residency Training in Critical Care at the University of Wisconsin Hospital and Clinics
Preceptor for Critical Care Rotations
Special interests include teaching, learning, critical care, toxicology


Sara Weidert, PharmD
Clinical/Staff Pharmacist

PharmD – East Tennessee State University, Johnson City, TN (2012)
PGY1 – University of Tennessee Medical Center, Knoxville, TN
Special interests include critical care, emergency and infectious disease pharmacy.


Lisa Wolf, CPA, CGMA
Sourcing Manager

Bachelor of Business Administration University of Wisconsin Eau Claire
Preceptor for the longitudinal PGY2 Supply Chain Rotation

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