Professor of Practice in Leadership

Mark Hertling, D.B.A

Lieutenant General (retired) Mark Hertling retired from the military in 2013. For several years he served as a Senior Vice President and advisor at the Leadership Institute at AdventHealth. His book, Growing Physician Leaders, provides leadership lessons for those in the healthcare industry. He has taught his course at several healthcare systems, and there are now over 1200 physician, nurse and administrator graduates.

Mark served for 38 years in the US Army as a tanker and cavalryman, commanding at every level from tank platoon to Field Army. He finished his Army career as the Commanding General of US Army Europe in 2012, where he over 60,000 soldiers and partnered with the Armies of 51 nations. He served over three years in combat, including Commanding the US Army’s 1st Armored Division (1AD) and Task Force Iron in Northern Iraq for 15 months during the surge.

Mark received a Bachelor of Science from the U.S. Military Academy in 1975, and he holds three master’s degrees: a masters of kinesiology from Indiana University’s School of Public Health, a masters in military arts and sciences from the Army’s School of Advanced Military Studies, and a masters in international relations and security studies from the National Defense University in Washington, DC. In 2019, Mark received a Doctor of Business Administration from the Crummer School of Business at Rollins College, defending research addressing physician leadership in the healthcare industry.

After retiring from the Army, LTG Hertling was appointed by President Obama as one of 25 members to the President’s Council on Fitness, Sport and Nutrition. In 2021, he was appointed by President Biden as one of eleven commissioners on the American Battle Monument Commission. He also serves as an advisor to the non-profit organizations “Mission: Readiness” in California, and “Operation Gratitude” in Washington DC. He served for five years as an adjunct scholar at West Point’s Modern War Institute, and he currently is a member of the Dean’s Alliance at the School of Public Health of Indiana University. He teaches MBA students here at the Crummer School of Business at Rollins College as a Professor of Practice in Leadership. He is the senior military and national security analyst for CNN/CNN International.

Mark is married to his best friend, Sue. They have two sons, two terrific daughters-in-laws, and five grandsons.


  • DBA, Crummer Graduate School of Business at Rollins College
  • MS, Indiana University’s School of Public Health
  • MA, Army’s School of Advanced Military Studies
  • MA, National Defense University
  • BS, United States Military Academy


Insights on the Ukraine-Russia Conflict
Ten Tips for a Crisis

Retired Lt. General, Crummer EDBA Graduate Mark Hertling Shares Thoughts on Ukraine-Russia Conflict

In an exclusive in-person session to the Crummer community, the retired Lieutenant General and CNN analyst spent an afternoon discussing the conflict with Crummer students and alumni.

Dr. Mark Hertling, a fixture in the Crummer community, is quickly becoming a fixture on the TV screens in millions of homes across America as well.

Over the past couple of months, he has been a leading voice on the Russia-Ukraine conflict, sharing his perspective as CNN’s leading military analyst.

The Crummer EDBA graduate and adjunct professor served 38 years in the U.S. Army as a tanker and cavalryman – commanding at every level from tank platoon to Field Army and ultimately serving as the Commanding General of US Army Europe in 2012. His nearly four decades of military experience and specifically his experience in Europe has given him a unique and highly-educated perspective on the Russia-Ukraine conflict.

Ten Tips for a Crisis: Lessons from a Soldier

Lieutenant General, US Army (Retired); Military and International Affairs Analyst, CNN, Atlanta, Georgia; Former Senior Vice President for Global Partnering, Health Performance Strategy, and Physician Leadership, Florida Hospital, Orlando, Florida; Adjunct Scholar, Modern War Institute at West Point, US Military Academy, West Point, New York; Adjunct Professor, Crummer School of Business, Rollins College, Orlando, Florida.

A few days ago, I had a heartfelt conversation with my good friend Dr. Omayra Mansfield. Dr. Mansfield has been an Emergency Department Physician for more than 12 years. She is also the wife of another physician and the mother of two young children, the recently appointed Chief Medical Officer at one of our hospitals at AdventHealth, and one of the first graduates of the Physician Leader Development Course I teach.

“During the leadership course, you always provided examples of how physicians are like soldiers,” she began. She reminded me of my words describing how both doctors and soldiers are part of a professional body, how both have a cherished ethos and a set of directing values to guide both their path and their actions as a very special part of our society, and how of all the professions in our society, the military and medicine are the only two that deal in life and death, albeit in very different ways.

She had certainly paid attention in our seminars. Now, as she and her team faced the COVID-19 pandemic, she realized their daily challenges are expanding and they are now going to war. The leadership discussions that had sparked so much debate in our colloquia had now become real.