Mark O’Neil

senior advisor – leadership & Strategy

Darian Barnett


Bachelor of Science in Physical Education, Norwich University

Master of Military Arts & Science, U.S. Army Command & General Staff College

Senior Service College Fellowship:, Central Intelligence Agency (CIA)


Combat-proven and decorated, Mark has a demonstrated track record of adding value – connecting passion with purpose, developing teams, inspiring audiences, and building enduring relationships.

Mark served a distinguished 33-year career in the U.S. Army, including 16 years with the Special Operations Command. He assessed, selected, trained and led the most elite special operations organization in the world, solving our nation’s most complex and dangerous problems. After retiring as a major general, he is continuing his lifelong work of helping people and organizations develop and improve through leadership lessons applicable to today’s business environment.

Comfortable in crisis action planning in competitive, dynamic, and high-risk environments, Mark energizes leaders by inspiring them to act with disciplined initiative. He shows how to establish a culture where teams strive to be proactive, focus on priorities more efficiently, and optimize problem-solving skills.

Mark’s ability to build elite teams and achieve alignment is unparalleled. 



Client Testimonials

“MG O’Neil inspired over 2,000 attendees and 150 Commissioning Military Officers by sharing his personal leadership experiences, insights into the contemporary operational environment, and emphasis for effective relationships across institutional and organizational boundaries. His expert commentary and dialog with University Faculty and Staff, students and parents furthered an important discussion on organizational leadership and relationship building.”

–  Daphne Larkin, Norwich University