Hospitals
10 Memorial Hermann executives
These ten Memorial Hermann executives currently hold president and CEO, executive and senior vice president, hospital CEO, chief operating officer, CFO, chief information officer and chief nurse executive roles. A reader can learn how executives lead Memorial Hermann and its hospitals and campuses.
Professionals to explore
01—10Allen Tseng
LinkedInExperience: Chief Operating Officer · Memorial Hermann Memorial City Medical Center
Chief Operating Officer at Memorial Hermann Memorial City Medical Center since January 2014; the profile says the role includes executive oversight of all clinical service lines, ancillary services and OR operations. The profile also lists Sr. Director, Business Development and Ancillary Services at Memorial Hermann Memorial City Medical Center (2010–2014).
Amanda Hammel
LinkedInExperience: SVP, Chief Information Officer · Memorial Hermann Health System
SVP, Chief Information Officer at Memorial Hermann Health System since May 2018, a C-level general management role, and VP, ISD Operations and Pop Health at Memorial Hermann Health System (2007–2018). The profile also lists Director at Cerner Corporation (1995–2007).
Bryan Sisk
LinkedInExperience: SVP, Chief Nurse Executive · Memorial Hermann Health System
SVP, Chief Nurse Executive at Memorial Hermann Health System since March 2022, based in Houston, Texas, according to the profile. The profile describes Memorial Hermann Health System as a non-profit, values-driven, community-owned health system, and this is the only role shown in the listing.
David L Callender MD
LinkedInExperience: President and CEO · Memorial Hermann Health System
President and CEO of Memorial Hermann Health System since September 2019; the profile describes the system as one of the largest nonprofit health systems in Texas, with 18 hospitals and over 280 care delivery sites in the Greater Houston area. The profile also lists President at The University of Texas Medical Branch at Galveston (2007–2019).
James (Jamie) McCarthy MD MHA FACEP
LinkedInExperience: Executive Vice President and Chief Physician Executive · Memorial Hermann Health System
Executive Vice President and Chief Physician Executive at Memorial Hermann Health System since March 2018, a role the profile lists as current. The profile also lists Medical Director - West University Place EMS at City of West University Place and Emergency Medicine and Staff Physician roles at UTHealth Houston, all marked current.
Justin Kendrick
LinkedInExperience: SVP & CEO · Memorial Hermann The Woodlands Medical Center and Northeast Hospital
SVP & CEO at Memorial Hermann The Woodlands Medical Center and Northeast Hospital since August 2020. Other roles listed are VP Operations, COO at Memorial Hermann - Texas Medical Center (2019–2020), VP Operations, COO at Memorial Hermann The Woodlands Medical Center (2014–2019) and Chief Operating Officer at Texoma Medical Center (2011–2014).
Matt Pruitt, MBA
LinkedInExperience: VP, Chief Financial Officer - Texas Medical Center Campus & TIRR Memorial Hermann · Memorial Hermann Health System
VP, Chief Financial Officer - Texas Medical Center Campus & TIRR Memorial Hermann at Memorial Hermann Health System since August 2024, providing executive leadership over financial operations according to the profile. Other roles listed include Associate Vice President, Finance - Texas Medical Center Campus at Memorial Hermann Health System (2022–2024) and Director, Finance Operations - University Hospitals at UT Southwestern Medical Center (2019–2022).
Paul O'Sullivan
LinkedInExperience: Senior Vice President and Chief Executive Officer · Memorial Hermann Health System
Senior Vice President and Chief Executive Officer at Memorial Hermann Health System since August 2018, a role the profile places at Memorial Hermann Memorial City, and another entry under the same title dated 2015–2018. Other roles listed include Heart and Vascular Service Line Leader and Chief Executive Officer - Heart and Vascular Institute (2010–2015) and Chief Operating Officer (2006–2010) at Memorial Hermann Health System.
Rhonda Abbott, PT, FACHE
LinkedInExperience: Senior Vice President & CEO at TIRR Memorial Hermann and the Memorial Hermann Rehabilitation Network · TIRR Memorial Hermann
Senior Vice President & CEO at TIRR Memorial Hermann and the Memorial Hermann Rehabilitation Network since December 2020. Other TIRR Memorial Hermann roles listed include Vice President of Operations (2019–2020), AVP, Clinical Operations (2016–2019) and Administrative Director of Therapy Services and Clinical Programs (2013–2016).
Sam Fulton
LinkedInExperience: VP Finance CFO - Physician Organization · Memorial Hermann Health System
VP Finance CFO - Physician Organization at Memorial Hermann Health System since February 2022, based in Houston. The profile also lists Chief Financial Officer at AdventHealth Medical Group, East Florida (2020–2022), VP - Finance CFO - Physician Enterprise at CHI St. Luke's Health (2017–2019) and Visiting Professor of Practice at Texas A&M School of Public Health since 2024.
Choose the right perspective
Match the executive's scope to your question, since system officers see different decisions than the CEO or chief operating officer of a single hospital or campus. Check when each person started the relevant role so you know how current their view of that part of the system is.
Questions to take into the conversation
- 01How does Memorial Hermann divide decisions between system leadership and individual hospital CEOs?
- 02How are financial targets set and tracked for Memorial Hermann's campuses and physician organization?
- 03What should a vendor or partner understand about how Memorial Hermann evaluates and approves new clinical or technology programs?
Reaching Memorial Hermann executives
How can I contact one of these Memorial Hermann executives?
Pick one of the 10 people on this page and choose "Book a paid call", or describe your project to find others. You offer a fee for a 15-minute call or a written answer, Instant Expert finds the person's work email and sends the invitation, and they decide whether to accept. The list covers 4 companies, including Memorial Hermann Memorial City Medical Center, Memorial Hermann Health System and Memorial Hermann The Woodlands Medical Center and Northeast Hospital, based on profile data retrieved on October 5, 2026. Being listed here doesn't mean someone has agreed to take calls.
How much does it cost to reach Memorial Hermann executives?
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About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot and may describe past or present roles. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.
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