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About Us

The NPS Crew Endurance Team can assist commands across the fleet by providing the necessary training and resources to leadership and to individual sailors. We can also provide on-site training and evaluation upon request. Please use the contact form at the bottom of this page to send us a message.



Our Mission is to:

  • Improve the quality of life and endurance of military service members
  • Educate service members and their leaders about the value of healthy sleep habits
  • Provide resources to evaluate and mitigate crew endurance problems at the individual and command level
  • Clearly illustrate the impact of crew endurance on operational readiness.

Our Team

Nita Lewis Shattuck, Ph.D.

Crew Endurance Team Lead, Human Systems Integration Program, Operations Research Department, NPS

Dr. Nita Lewis Shattuck is a Professor at the Naval Postgraduate School (NPS) in Monterey, California. She holds faculty appointments in the Operations Research and Systems Engineering Departments and the MOVES Institute. Dr. Shattuck teaches courses in human factors engineering and human systems integration (HSI), directs thesis research, and pursues her research interests in human fatigue in operational settings, individual and team performance, decision-making, situated cognition, and military command and control. Dr. Shattuck founded the Human Systems Integration (HSI) Program at NPS in 2003, serving as the Program Director until 2008. She has developed and taught multiple distance and resident courses and has collaborated in the design of a Distance Learning HSI Masters degree. Show More

In her work with the military, Dr. Shattuck has studied the effects of fatigue, sleep deprivation, thermal stress, and acceleration (+Gz-induced LOC and motion) in various operational and laboratory environments. She has studied work and rest patterns of US Navy Sailors on over 20+ ships; assessed work and rest patterns of Marine Corps Embassy Security Guards located throughout the world; conducted a 4-year longitudinal study of sleep and performance of Cadets at the US Military Academy, West Point, NY; assessed sleep and academic performance of US Navy Recruits at the Recruit Training Command, Great Lakes, IL; and studied the effects of delayed bedtime and wakeup times on performance of US Army Basic Combat Trainees at FT Leonard Wood, MO. In studies of US Marines at Camp Pendleton, CA, Dr. Shattuck examined the effects of waterborne motion exposure to cognitive and physical performance in Marines and was co-investigator of a study of egress times from amphibious vehicles. Dr. Shattuck has served as Principal Investigator on numerous other operational field studies including sleep and psychomotor performance of crewmembers on the USS Independence (LCS 2) Rough Water Trials. She served as advisor to the President’s Emergency Operations Center of the White House, documenting improvements in sleep and morale following adoption of a novel watchbill. Most recently, Dr. Shattuck led a team to study work and rest patterns of members of the Reactor Department of the USS NIMITZ (CVN 68), focusing on their performance using different watchbills. Current research includes a longitudinal study of 4 USN ships, 2 on circadian-based watchbills and 2 on non-circadian watchbills. The multi-ship trial assesses shipwide and individual Sailor performance to compare whether stress and resilience levels differ among the 2 groups. She is also directing a study looking at the magnitude of unaccounted workload burden or "requirements creep" on US Navy crews. 

Dr. Shattuck has published widely and is the recipient of the 2013 Surface Navy Association Literary Award, the 2007 'Jimmie' Hamilton Award from the American Society of Naval Engineers (ASNE) for Best Paper, the Roland Calori Award for Best Paper for 2006-2007 in Organizational Studies journal and the 2006 Gary F. Wheatley Award for Best Paper from the International Command and Control Research and Technology. Dr. Shattuck received her Ph.D. in Behavioral Sciences from the University of Texas School of Public Health. She can be reached at: Naval Postgraduate School, Glasgow Hall, Room 225, Monterey, California 93943. Her email address is nlshattu@nps.edu.

Panagiotis Matsangas, Ph.D., Commander, Retired, Hellenic Navy

National Research Council Postdoctoral Fellow, NPS

Dr. Panagiotis Matsangas is currently a National Research Council Postdoctoral Fellow at the Naval Postgraduate School. He served as a Naval Officer in the Hellenic Navy for 25 years (1988-2013). His 12–year operational experience at sea culminated as Executive and Commanding Officer (1998-2002) in Fast Attack Ships. Dr. Matsangas earned two masters degrees (Operations Research and Modeling of Virtual Environments and Simulation) while attending the Naval Postgraduate School from 2002-2004. In 2013, he received his Ph.D. in Modeling and Simulation from the Naval Postgraduate School and retired from the Hellenic Navy as a Commander. He has participated in research projects for the Department of the Navy, Office of Naval Research, and the Naval Surface Warfare Center. Show More

Since 2013, Dr. Matsangas has been a National Research Council Postdoctoral Fellow in the Operations Department at the Naval Postgraduate School. Given his experience of living and working at sea, his research interests center around human performance--specifically, factors such as motion, motion sickness, sopite syndrome, sleep deprivation and fatigue. His current research concentrates on watch schedule optimization, and the impact of sleep deprivation and fatigue on performance in the maritime operational environment. His email address is pmatsang@nps.edu.

Brennan D. Cox, Ph.D., LCDR, USN

Human Systems Integration Program, Operations Research Department, NPS

Dr. Brennan Cox is an active duty Industrial and Organizational Psychologist currently serving as Assistant Professor of Operations Research at the Naval Postgraduate School in Monterey, CA, where he teaches in the Human Systems Integration program. He received a commission in the U.S. Navy in 2010, completed naval flight training in 2011, and has since held leadership roles in research and applied settings within military commands. As a designated Naval Aerospace Experimental Psychologist, his areas of expertise include personnel testing and assessment, performance management, and organizational systems. Dr. Cox's work in these areas has appeared in over 50 scientific journals, edited books, technical reports, and conference proceedings, and led to his selection as the 2016 Naval Medical Research and Development Enterprise Junior Officer of the Year. His email address is bcox@nps.edu.

Lawrence G. Shattuck, Ph.D., Colonel, Retired, US Army

Human Systems Integration Program Director, NPS

Dr. Larry Shattuck serves as the Program Director of the Human Systems Integration (HSI) Masters Degree and Certificate Programs. He has been involved in fatigue and sleep research since 2003 when he co-lead a 4-year longitudinal study of sleep in Cadets at the United States Military Academy (USMA), West Point. As a 30-year veteran of the US Army, COL Shattuck has witnessed the debilitating effects of sleep deprivation fiirst-hand and brings his years of leadership and academic experience to the Crew Endurance Team. COL Shattuck directed the Engineering Psychology Program at USMA prior to joining the faculty at NPS in 2005. His research interests include military command and control, communication of intent, human systems integration, trust and autonomy. COL Shattuck's email address is lgshattu@nps.edu.


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