Dr. McKenas is President, Logos Medical Consulting Services, LLC.   He is a board certified specialist in occupational medicine and aerospace medicine, and is certified by the American Board of Independent Medical Examiners.  He served as Corporate Medical Director and medical director in various capacities for the world's largest air carrier for 10 years prior to moving into independent consulting practice.    Through his research, he pioneered on-board commerical aircraft defibrillation as a life-saving tool to assist passengers suffering life-threatening cardiac arrest, and enhanced on-baord medical response kits, which soon became industry standards.  He also served as the Director for the Space Shuttle Contingency Support Office for NASA and the Department of Defense Space Shuttle Contingency support operations for five years.   A graduate from the Harvard School of public health, he is expert in on-board passenger medical events, flight crew, aviation industry health issues, corporate medical programs, and occupational medicine issues.