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Our list of team members

About Us


Steve Pitzer

President | CEO

Steve Pitzer comes to Transplant Coordinators of America with nearly 25 years of experience in the organ donation field. He got his start in the field in 1986 as an organ procurement coordinator in the U.S. Air Force. From there, Pitzer was employed with UNOS Organ Center as an organ placement coordinator. 


Robert Koppenaal

VP Operations

Robert began his journey in the transplant field over 13 years ago. He started with Transplant Coordinator of America 6 years ago and has since become a vital role in the development of our operations. His innovative mindset has allowed our organization to become the high-quality service experience your team has come to value and expect.


Richard Gray Granger

Sr. Coordinator/Advisor

Gray Granger joined TCOA with more than 20 years of experience as a senior organ placement specialist and CPTC with UNOS. In this role, Granger provided assistance to organ procurement agencies and transplant centers by allocating organs, assisting with transportation and providing input on policy development. He has served as a faculty member at university-sponsored symposiums and other public-speaking venues.


Toni Ashton


Over 6 years with Lifepoint OPO with Nursing degree from Kirkwood Community College. Hospital experience in surgery, ICU, surgical trauma, digestive diseases ICU. Worked with TCOA since 2014.


Laura Anderson


RN 22 years, CPTC (2003), Organ Procurement Coordinator 13 years. Current active critical care RN. With TCOA since 2017


Lynette Williams


Worked at Missouri OPO since 2012. With TCOA since 2017. Licensed EMT since 1999, Paramedic since 2002. Paramedic instructor (specialty in ACLS, PALS, and ITLS) with University of Missouri, (K.C). Currently attending school for a Registered Nurse degree by end of 2018. Bachelors in Psychology.


Bridgette Carstensen


B.S & M.S. in Biology from Rensselaer Polytechnic Institute. 3+ years experience at the Center for Donation and Transplant NY/VT as both an Organ Procurement Coordinator and a Quality Analyst. With TCOA since 2018.


Patrick Silva


Doctor of Medicine from Far Eastern University-NRMF, Philippines & B.A. Psychology. Organ Transplant experience field since 2003 as a triage & recovery coordinator for OPO in St. Louis for 12 years. Has been with TCOA since 2016.


Thomas Mulligan


Bachelors in Nursing 2004 from UCF Masters in Nursing concentration in Education from Walden University 2011 Worked Florida Hospital Cardiac Units 2003-2006 Translife OPO Organ Procurement RN 2007-2009 Mayo Clinic Transplant Center 2010-Present


Lauren Neal


BS in Nursing and a MBA from Southern Illinois University. 8 years as a Recovery Coordinator with Mid-America Transplant Services in St. Louis, MO and with TCOA since 2015.


Luann Mitcham


20 yrs CPTC, ABTC
32 yr RN


Charity Hagemeier

RN Coordinator

RN, BSN, CPTC - 10 years in Organ Procurement. With TCOA since 2017


Samuel Blanchette


3 yrs Organ Preservation Specialist 1 yr Tissue recovery coordinator 2 yrs w/ TCOA


Shanna Nimmons


Currently, Shanna is a dedicated transplant coordinator for our organization. Her background includes, 5 years of experience with an Organ Procurement Organization that included kidney perfusion and organ procurement coordination and 4 years working with physicians and their hospital owned practices to help coordinate and manage day to day operations.

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