People Category: AIAA Propulsion and Energy Forum 2021

Darren McKnight

Dr. Darren McKnight is currently Senior Technical Fellow, LeoLabs. Darren leads efforts to realize the value proposition for the growing global network of ground-based radars for space situational awareness, space safety, and space sustainability. He creates new data depictions, develops risk algorithms, and leads space incident investigations.

He has coauthored five books on topics ranging from space debris and spacecraft operations to soccer coaching and workforce productivity. Darren has authored over 100 technical papers and presented them in 16 countries.

Karen Thole

Dr. Karen A. Thole is a Distinguished Professor and head of the Department of Mechanical Engineering at The Pennsylvania State University. Dr. Thole’s expertise is heat transfer and cooling of gas turbine airfoils through detailed experimental and analytical work that have led to greatly improved gas turbine efficiencies and performance. Thole developed several key technologies including one that dramatically reduces vortical structures in airfoil passages resulting in reduced heat transfer. This fundamental work produced advances now used in industry that improve aerodynamics, reduces cooling, and extends component life.  She directs the Steady Thermal Aero Research (START) Lab, which focuses on turbine heat transfer, additive manufacturing, and instrumentation development. Dr. Thole has published over 270 archival journal and conference papers and has supervised over 75 dissertations and theses. She has served on two National Academy of Engineering study committees related to low carbon aviation and advancing gas turbines. She has been called upon to testify to the US House of Representatives’ Science, Space and Technology Committee on sustainable aviation. Dr. Thole is a  Fellow of ASME and AIAA.  In 2014, Dr. Thole was awarded SWE’s Distinguished Engineering Educator Award.  Dr. Thole has received the 2015 ASME George Westinghouse Gold Medal for her work in gas turbine research, the 2016 Edwin F. Church Medal in Engineering Education, and in 2017 she received the ABET Claire L. Felbinger Diversity Award. In 2019, she was recognized by AIAA’s Air Breathing Propulsion award. She holds two degrees in Mechanical Engineering from the University of Illinois, and a PhD from the University of Texas at Austin. For more information, Dr. Thole’s full CV is located here,a student-written story, and her own story is located here.

Jonathan Cirtain

Dr. Jonathan W. Cirtain is vice president and chief technology officer of BWX Technologies, Inc. (BWXT). In this role, he is responsible for the identification and development of new technologies for the company, integrating expertise and resources across the enterprise. He joined BWXT as director of Commercial Technologies in 2017, most recently serving as president of Advanced Technology Programs.

Dr. Cirtain co-founded Astraea, Inc. – a small business created to design and develop a platform for machine learning and data science analytics utilizing Earth-observing satellite and in situ data sources. He served as the organization’s chief scientist and technologist.

Prior to his entrepreneurship, Dr. Cirtain spent nine years with NASA, beginning
his career as an astrophysicist and holding positions of increased responsibility at the Marshall Space Flight Center. He concluded his tenure with the agency as the manager of the Science Research Office, overseeing a staff of nearly 170 scientists and contractors in applied science and technology development.

With a passion for design and innovation, Dr. Cirtain has contributed to and
led teams in the development of leading science and technology application including, x-ray imaging telescopes, extreme ultraviolet (EUV) imaging telescopes, UV spectropolarimeters and EUV spectroscopic imagers for stellar astrophysics experiments. He also developed plasma confinement systems for lab research,
a solid rocket motor system for suborbital vehicles and graphics processing unit technology for video systems.

During his time with NASA in 2010, Dr. Cirtain received the most prestigious honor given by the U.S. government to scientists and engineers in the onset of their independent research careers – the Presidential Early Career Award for Scientists and Engineers.

Among his various honors and appointments, Dr. Cirtain has served on advisory committees for NASA, the National Science Foundation, U.S. Department of Commerce’s National Oceanic and Atmospheric Administration, U.S. Office of Science and Technology Policy, National Academy for Science and Engineering, Royal Academy of Science, European Space Agency and numerous universities.

Dr. Cirtain earned his Ph.D. in physics from Montana State. A graduate of the University of Memphis, he also holds bachelor’s degrees in physics and mathematics.

John S. Langford, III

John currently serves as Chairman and Chief Executive Officer of Electra.aero. John is an aerospace entrepreneur who founded Aurora Flight Sciences in 1989, Athena Technologies in 1998, and Electra.aero in 2020.  Aurora pioneered advanced robotic aircraft, Athena developed advanced flight control solutions, and Electra is developing sustainable aviation solutions for regional mobility.  Athena was sold to Rockwell Collins in 2008 and Aurora was sold to Boeing in 2017.

He is a member of the National Academy of Engineering and the immediate past-president of the American Institute of Aeronautics and Astronautics (AIAA).

Connect with John on LinkedIn.