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Become a member and receive career-enhancing benefits

Our top priority is providing value to members. Your Member Services team is here to ensure you maximize your ACS member benefits, participate in College activities, and engage with your ACS colleagues. It's all here.

Become a Member
Become a member and receive career-enhancing benefits

Our top priority is providing value to members. Your Member Services team is here to ensure you maximize your ACS member benefits, participate in College activities, and engage with your ACS colleagues. It's all here.

Membership Benefits
ACS
Membership

Executive Officers

The following surgeons are the elected officers of the new Excelsior Surgical Society:

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President

Lieutenant Colonel Danielle Holt, MD, FACS, MC, US Army

LTC Danielle Holt is the deputy chief of the department of surgery at Walter Reed National Military Medical Center while assigned at the Uniformed Services University in Bethesda, MD. She is a graduate of Vanderbilt University School of Medicine and Harvard University. LTC Holt completed her residency in general surgery at Tripler Army Medical Center in Honolulu, HI. She has been a Fellow of the American College of Surgeons since 2013 and an active member of the Excelsior Surgical Society since 2016.

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Vice-President (President Elect)

Colonel Jeremy W. Cannon, MD, FACS, MC, USAF

Colonel Cannon is the trauma program medical director and an associate professor of surgery at the University of Pennsylvania, PA. He is an active reservist currently assigned to Health Affairs in Falls Church, VA. He is a graduate of the U.S. Air Force Academy and Harvard Medical School and holds a Master of Science in Mechanical Engineering from MIT. He has been a Fellow of the American College of Surgeons since 2008 and an active member of the Excelsior Surgical Society since 2016.

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Secretary

Captain Matthew Tadlock, MD, FACS, USN

Captain Tadlock is a Trauma/Critical Care Surgeon currently assigned to 1st Medical Battalion-Detachment San Diego,1st Marine Logistics Group, where he is an attending surgeon at NMRTC-San Diego. He is an associate professor of surgery through the Uniformed Services University and associate clinical professor of surgery (non-salaried) at University of California San Diego. He has 5 deployments providing Health Service Support to USN, USMC, and NATO units in the Indo-Pacific, Central and Western Asia, on both land and sea; including two CVN's, one DDG, and as the Chief of Trauma at the Kandahar NATO Role 3. He has also deployed in support of military Humanitarian Assistance and Disaster Relief missions. He has held numerous leadership roles, most recently as the Navy Trauma Specialty Leader. He currently serves as the chair of the BUMED Trauma Advisory Board. Captain Tadlock has been a Fellow of the American College of Surgeons since 2015 and a member of the Excelsior Society since 2016.

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Treasurer

Major Mary T. O’Donnell, MD, FACS, FASCRS, MC, US Army

Major Mary Teresa M. O’Donnell is an associate program director of the National Capital Consortium General Surgery Residency, and chief of the division of colon and rectal surgery at Walter Reed National Military Medial Center (WRNMMC). She is a graduate of Georgetown University and Uniformed Services University. She completed her residency in general surgery at WRNMMC and fellowship training in colon and rectal surgery at University of Pennsylvania.

Major O’Donnell has a special interest in surgical simulation and education, completing the American College of Surgeons Accredited Education Institutes Fellowship in 2014. She has deployed with the 772nd Forward Surgical Team to Tarin Kowt, Afghanistan in support of Operation Freedom's Sentinel, and to Camp Arifjan, Kuwait in support of the 86th Combat Support Hospital. She is also an assistant professor of surgery at USUHS.

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Councilperson at Large, U.S. Army

Major Maggie Gallagher, MD, FACS, USA

Dr. Gallagher is originally from Waukesha, Wisconsin. After completing her undergraduate degree at the United States Military Academy at West Point, she received her medical degree from the Uniformed Services University of the Health Sciences (USUHS) in Bethesda, MD. She completed her general surgery residency at Tripler Army Medical Center in Honolulu, HI. She then completed her pediatric surgery fellowship at the Children’s Hospital at Vanderbilt in Nashville, TN. She is board certified in general and pediatric surgery and is currently a pediatric surgeon at Brooke Army Medical Center in San Antonio, TX.

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USN Councilperson at Large

Commander Tamara Worlton, MD, FACS, USN

Commander Worlton received her Doctor of Medicine from the Uniformed Services University of the Health Sciences. She completed her general surgery residency at National Naval Medical Center (NNMC) and a bariatric surgery fellowship at Cleveland Clinic in Cleveland, Ohio. She was the Ship's Surgeon for the USS Abraham Lincoln (CVN 72) and deployed to Tarin Kowt a Role 2 in Afghanistan. She served as the Director of Surgical Services at the Expeditionary Medical Facility in Camp Lemonnier, Djibouti. Commander Worlton served aboard the USNS MERCY (T-AH 19) and USNS COMFORT (T-AH 20) with the most recent mission being the deployment to New York City for COVID-19. She serves as the director for global surgery at USU, director of surgical operations at the Center for Global Health Engagement, and is the metabolic and bariatric surgery director at Walter Reed National Military Medical Center (WRNMMC).

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Councilperson at Large, Reserve/National Guard

Commander Jacob Glaser, MD, FACS, USNR

Commander Glaser is a trauma and critical care surgeon and is currently the trauma medical director and surgical ICU director at Providence Regional medical Center in Everett, Washington. He trained in general surgery at the National Capital Consortium, and critical care at the Shock Trauma Center in Baltimore, Maryland. While active duty he has served as a flight surgeon with VP-40 in Whidbey Island, Washington, a general surgeon at 29 Palms, California, and a trauma surgeon at Brook Army Medical Center. He has deployed to Iraq, Qatar, Djibouti, and Afghanistan, and served as the chief of trauma at the NATO Role III in Kandahar. He also served as the Navy Liaison to the Joint Trauma System while stationed in San Antonio. After 16 years active-duty service he transitioned to the Navy Reserves in 2020, and currently drills in Everett, Washington.

He maintains an active role in research and continues to consult for the Naval Medical Research Unit in San Antonio, with a special interest in whole blood resuscitation, artificial blood products, REBOA, and large animal models of trauma and resuscitation. He also oversees a new military-civilian partnership between his institution and Naval Hospital Bremerton.

Commander Glaser carries a faculty appointment as an associate professor at USUHS and clinical assistant professor at Washington State University. He has been a Fellow of the American College of Surgeons since 2016 and a member of the Excelsior Surgical Society since 2017.

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Councilperson at Large, U.S. Air Force

Colonel Scott Zakaluzny, MD, FACS, USAF

Colonel Zakaluzny received his doctorate of medicine from F. Edward Hebert School of Medicine, USUHS. He completed his residency at Wright State University. He completed his fellowship at LA County+USC.

He is stationed at Travis AFB, CA, where he is a clinical assistant professor of surgery embedded at UC Davis Medical Center as part of a long-standing civilian-military partnership and residency training program. He is an assistant professor of surgery at the Uniformed Service University. He has deployed to Afghanistan twice, serving as both the Trauma Czar and DCCS at Bagram.

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Councilperson at Large, Civilian

Carey Hill, MD, FACS, USA, Colonel (retired)

Bio to come

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Councilperson at Large, Resident/Fellow

RMKD “Kal” Gunasingha, MD

R. M. Kalpanee D. Gunasingha is a general surgery resident at Walter Reed National Military Medical Center. She is a Captain in the U.S. Army. She graduated from Duke University School of Medicine in 2017 and received a bachelor’s of science in chemical engineering from LSU (Geaux Tigers!) in 2013. She plans to pursue a fellowship in vascular surgery, and hopes to, apply her engineering background in her future career and research. She is interested in clinical research as well as quality improvement. In her free time, she likes to spend time with her wonderful finance and her family, go hiking, paint, and try new recipes.