Dr. Jonathan Fisher

Chief Business Officer


Dr. Jonathan Fisher is Fifth Gait Technology, Inc.’s Chief Business Officer and Director of the Applied Physics and Technology group. Dr. Fisher joined Fifth Gait Technologies to launch the development of a globally recognized space radiation environment and effects group as well as nationally recognized shock physics team. These advanced technology teams have expanded and include the following products: the SIRE2 Family of Tools as well as the XTRRA Toolkit. Dr. Fisher remains very active in research and development in his fields of expertise as well as mentoring a team of scientist and engineers to be our next generation of recognized subject matter experts. Prior to his work at Fifth Gait, Dr. Fisher has served as the director and principal investigator (PI) at GH Systems, a scientist and principal investigator at Mission Research Corporation, an Associate Fellow of the Technical Staff at Nichols Research Corporation, and a NASA Space Grant Fellow during his doctoral studies.

Dr. Fisher’s career is dedicated to space and radiation hardened technology design, verification, and testing. He has led the development of multiple community-standard modeling and simulation tools, radiation test diagnostics and experiment platforms, and radiation test standards in support of multiple DoD organizations. He authored/co-authored numerous peer-reviewed journal articles and more than 70 Hardened Electronics and Radiation Technology (HEART) Conference papers including best papers for the 1999 and 2010 HEART conferences. He has also led and collaborated with the presentations and publication of papers at the IEEE-NS, MSS, APS, and other conferences.

Dr. Fisher holds a Doctor of Philosophy in Applied Physics from Alabama A&M University, and both a Master of Science in Physics and a Bachelor of Science in Applied Physics from Eastern Kentucky University. He is a senior member of IEEE-Nuclear Science Society, a member of the American Physical Society since 1993, and an active member of the HEART Society since 1990 and past Chair of the HEART Executive Steering Committee (chair 2016-2018, past chair 2019-2024).

start your project with the fifth gait team

Our team is composed of renowned subject matter experts and the next generation of scientists, engineers, and analysts. We believe that our unicorns’ ‘fifth gait’ is the missing piece in your system’s survivability. We have three primary sites, several satellite locations, and a growing number of virtual offices.


Santa Barbara, CA
Corporate Headquarters
835 Puente Drive
Santa Barbara, CA 93110

Colorado Springs, CO
Goldflam Laboratory
5053 N 30th Street
Colorado Springs, CO 80919

Huntsville, AL
Rocket City Laboratory
6767 Old Madison Pike
Building 3, Suite 300
Huntsville AL 35806