Dr. Joseph during the period 10 January 2018 until mid-April 2021 served as the Chief Scientist of the United States Department of the Air Force, Washington, D.C. In this role as the senior-most scientific adviser to the AF Chief of Staff, Chief of the US Space Force, and Secretary of the Department of the Air Force. He provided assessments on a wide range of scientific and technical issues affecting the Air Force mission. He also identified and analyzed critical technical issues and brought them to the attention of Air Force leaders, interacting with other Air Staff principals, operational commanders, combatant commands, acquisition and science and technology communities to address cross-organizational technical issues and solutions. He also interacted with other services and the Office of the Secretary of Defense on issues affecting the broader national security technical enterprise. He served on the Executive Committee of the Air Force Scientific Advisory Board and as a government advisor to the Defense Science Board. He was the principal science and technology representative of the Air Force to the civilian scientific and engineering community and to the public at large. 

This assignment followed a 40-year career as educator, research leader, strategic planner, arms control advisor, board member, and private businessman. He holds a B.S in Physics from Georgetown University and a Ph.D in Physics from the University of Texas at Austin. He has worked in the US Air Force, Los Alamos National Laboratory, DoD (OSD), and NASA.