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  • Senior Management

    Charles E. Halstenson, Pharm. D., CEO
    Chuck Halstenson is a research and healthcare executive with over 30 years
    of diverse management and entrepreneurial experience including clinical
    research and multi-site healthcare systems. Chuck received his Pharm. D.
    degree from the University of Minnesota. Chuck is a Clinical Professor, Department of
    Pharmacy Practice at the College of Pharmacy, University of Minnesota.
    Chuck has presented 109 scientific abstracts at pharmacy related scientific
    meetings, wrote seven book chapters and published 85 articles in
    peer-reviewed scientific literature. Chuck is a Fellow of Clinical Pharmacology
    and a Fellow, American College of Clinical Pharmacy.

    Jeffrey D. Cosgrove, President
    Jeff Cosgrove is a research executive with
    30 years of experience in
    operational management of clinical research for the pharmaceutical industry.
    Jeff has been
    published in industry publications, served as a guest faculty lecturer for the
    University of Minnesota, Masters in Research Program as well numerous
    other associations. Jeff has been directly involved in the management of
    over 800 early phase research protocols since 1990.

  • Principal Investigators

    Mark A. Matson MD, Investigator

    Dr. Mark Matson joined Prism Clinical Research as an investigator in 2007.
    He earned his BA in Biochemistry, Molecular and Cell biology from
    Northwestern University in Evanston, IL. He is a graduate of the University of
    Minnesota Medical School. His post-graduate training consists of an Internal
    Medicine Residency at the Medical College of Wisconsin and a Nephrology
    Fellowship at Hennepin County Medical Center/ University of Minnesota.
    He began to work as in investigator in a Phase I drug studies unit in 1990.
    He has published numerous articles in medical journals and textbooks
    including a chapter on Drug Induced Renal Disease in Pharmacotherapy.
    During his years of clinical practice he has served in many management
    and leadership roles on the medical staffs of hospitals and practice groups
    and has been part of the clinical faculty of residency training programs.
    He is certified in Internal Medicine and Nephrology by the American Board of
    Internal Medicine and as a Specialist in Clinical Hypertension by the
    American Society of Hypertension.


    Trisha Shamp PA-C, PhD

    Trisha Shamp brings to Prism Clinical Research nearly 20 years of clinical 
    research experience conducting Phase I-IV clinical trials. Her unique background 
    as a board certified Physician Assistant with PhD focused in Clinical Pharmacology
    provides a strong acumen for both volunteers and sponsors. She brings with her 
    over 15 years of experience in Pulmonary/Critical Care medicine as well as 
    consultation expertise for protocol development, pharmacokinetic modeling, 
    drug safety and pharmacovigilance. Trisha serves as a frequent educator for
    many PA and medical school programs both in clinical medicine and Pharmacology. 
    She has recently been accepted as a KOL regarding online training in 
    Pharmacology through Harvard Medical School online learning platform, HMX Fundamentals.  Her interests include the special considerations of performing clinical research and informed consent in a critical care setting as well as PK studies in volunteers with renal failure.  Trisha’s first and foremost priority is to ensuring our volunteer’s safety as well as study integrity and protocol execution. In addition to her work at Prism, she continues to serve her community as an ACLS instructor and frequent volunteer for global medical missions across the world.

    Dr. Shannon Canas

    Dr. Shannon Canas joined Prism Research as an investigator in 2007.  She is a graduate of Carleton College and the University of Chicago Medical School.  She completed her internal medicine residency at the University of Minnesota. She is board certified in Internal Medicine. Prior to joining Prism Research, Dr. Canas worked in primary care internal medicine for 5 years.  She enjoys the process of investigational medication development and being involved at the early stages of innovative new therapies.


    Dr. Gary D. Berman

    Gary D. Berman, MD earned his medical degree from the Mayo Medical School, Mayo Clinic Rochester, Minnesota. He was an Internal Medicine resident physician at the Cleveland Clinic Foundation, Cleveland, Ohio, and also completed Fellowships in Allergy and Immunology and Headaches. Dr. Berman is a Diplomate, American Board of Allergy and Immunology and is certified by the National Board for certification in Headache Management.

    He is an Adjunct Assistant Professor of Medicine, University of Minnesota, Division of Pulmonary, Allergy, and Critical Care. He is a Fellow of the American Academy of Allergy, Asthma, and Immunology and a member of the American College of Allergy, Asthma, and Immunology; the American Thoracic Society; and the American Headache Foundation.

    For the past several years, Dr. Berman has received the Minneapolis/St. Paul Magazine Top Doctor Award in the field of Allergy and Clinical Immunology.

    Dr. Berman is active in clinical research acting as principal investigator of studies in asthma, allergy, COPD, headache and migraine. He is the President of Clinical Research Network (CRN), a group of nationally recognized research sites. He has served on advisory boards for various pharmaceutical companies and lectures frequently on various topics including asthma, allergy and migraine. He has a busy practice devoting approximately 25% of his time to the treatment of headache patients.


    Dr. Daniel Ries

    Dr. Ries obtained his undergraduate degree from Carleton College and his medical degree from the University of Minnesota. He completed his Internal Medicine Internship and Residency at Duke University Medical Center in Durham, North Carolina. He completed a Fellowship in Nephrology at the University of Colorado Medical Center in Denver, Colorado in 2001. He has practiced with Kidney Specialists of Minnesota since 2001 and has a broad variety of clinical interests including critical care nephrology, fluid balance and electrolyte disorders, treatment of acute and chronic kidney disease, dialysis, and clinical research. He has been voted one of Minnesota's Top Doctors for Nephrology. Dr. Ries has participated in clinical research since 1999 and has been a Principal or Subinvestigator on over 300 clinical trials spanning all phases of drug development, currently serving as Medical Director of Twin Cities Clinical Research center and collaborating with Prism Clinical Research Center. He serves in an administrative leadership capacity for his practice and Allina Health Mercy Hospital and is actively involved in patient quality improvement and care delivery projects in this role.

    Outside of work, Dr. Ries enjoys spending time with his wife and two daughters. He enjoys long distance running, skiing, and reading.


    Dr. George Canas

    As an Iowa native, Dr. Canas received his medical degree from the University of Iowa Carver College of Medicine. He completed his internal medicine residency and fellowship training at the University of Minnesota. He has dual board certification in both internal medicine and nephrology. Since 2004, Dr. Canas has overseen upwards of 30 clinical studies as the Principal Investigator or Subinvestigator. He is locally recognized as an expert in kidney function and disease and was voted "Top Doctor" of nephrology in the Twin Cities by Mpls.St.Paul Magazine in 2010 and 2012.


    Retired Staff

    Dr. Karen Karn

    Dr. Karen Karn joined the Prism team in December 2012. She has been an investigator for phase II-IV pharmaceutical clinical trials at Prism's new partner, Ridgeview Research in Chaska, since 2006.

    Dr. Karn trained at the University of Minnesota and practiced Ob-Gyn for a number of years before changing her focus to pharmaceutical research. She was certified as a Physician Investigator by the Academy of Physicians in Clinical Research in 2009.

  • Recruitment Team

    If you email us, please check your junk or spam folder for our response!

    Please provide a phone number if you choose to email a recruiter!


    Dayna S

    Started with Prism in 2016

    Call/Text: 651-724-5047



    Lindsay D

    Started with Prism in 2017
    Call/Text: 651-368-3360 



    Jenna L

    Started with Prism in 2018

    Call/Text: 651-724-0500



    Andy H

    Started with Prism in 2019

    Call/Text: 651-332-1810



    General email inquiries: newstudy@prismresearchinc.com


  • Clinic Manager (Staff Hiring)

    Jordan Schiell

    Started with Prism in 2017

    Call: 651-641-2910


    *If you are interested a potential job opportunity at Prism Research, please email your resume to Jordan Schiell. 


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