Introducing the TSTI Instructor Team

Dr. Randy Liefer is a Associate Fellow of AIAA with over 26 years of aerospace engineering experience. He has earned advanced degrees from the Massachusetts Institute of Technology and the University of Kansas. He has served as Division Chief and Deputy Head of the Department of Astronautics at the U.S. Air Force Academy, and has been a member of the AIAA Space Systems Technical Committee. He is currently a Visiting Professor at Delft Technical University in The Netherlands working in the SpaceTech Masters Program in Space Systems Engineering.
Dr. Jerry Jon Sellers, author of Understanding Space: An Introduction to Astronautics, was the director of the U.S. Air Force Academy's Space Systems Research Center. He has over 22 years of space systems experience including Guidance & On-board Navigation Officer in Space Shuttle Mission Control; Assistant Professor of Astronautics at the U.S. Air Force Academy; and Chief of Astronautics for the Air Force European Office of Aerospace Research & Development. He is currently a Visiting Reader for University of Surrey, Guildford, England, where he earned his doctorate.
Dr. Pete Swan is an AIAA Fellow with over 38 years experience in both government and commercial space systems. He is a former faculty member at the U.S. Air Force Academy, spent 8 years at the USAF Space Division in Los Angeles as a spacecraft systems engineer and program manager, and worked with the Motorola space divisions for 10 years. He was a member of the Air Force Scientific Advisory Board and is now a member of the Army Science Board. Pete is an elected member of the International Academy of Astronautics, and an active player on the Committee on Scientific Legal Liaison and the Committee on Disaster Mitigation from Space. Editor of Impact of Space Activities upon Society and Global Mobile Satellite Systems. He is currently leading an Academy study of Space Expectations for the Commission (6) on Society and Space.

Dr. Peter Van Wirt is a former Deputy Department Head for Labs and Research of the Department of Astronautics at the U.S. Air Force Academy. He is currently the Central Case Project Coach for the Technical University of Delft's Spacetech Masters Degree in Space Systems Engineering . He also instructs at the National Security Space Institute in Colorado Springs, CO. He has served as a systems engineer/program manager for a variety of US Air Force engineering developments. Peter has over 22 years of aerospace engineering experience and over 10 years teaching experience. He earned his doctorate at the Utah State University.
Dr. Wiley Larson is managing editor of McGraw-Hill's Space Technology Series and editor and coauthor of Space Mission Analysis and Design and eight other reference books on space systems. He is director of SpaceTech's Masters Program in Space Systems Engineering at Delft Technical University in The Netherlands. He has also served as Head of Engineering at the International Space University in Strasbourg, France, and has over 30 years experience in space launch, satellite integration and test, space mission design. He has consulted with numerous government and industry organizations and taught thousands of people around the world. Wiley is an elected member of the International Academy of Astronautics.
Dr. Dave Cloud, editor of Applied Modeling and Simulation: An Integrated Approach to Development and Operation, has over 25 years experience in aerospace engineering, including 8 years as division chief and deputy head of the Department of Astronautics at the U.S. Air Force Academy where he coordinated the Guidance & Control and Astrodynamics portions of the Astronautical Engineering curriculum. He develops curricula and instructs at the National Security Space Institute, in Colorado Springs, CO. He earned his doctorate at Oxford University and has developed and taught numerous space engineering short courses throughout the Department of Defense, NASA, and industry.

Dr. Bob Giffen (Brig. Gen., USAF, retired), a contributing author to Understanding Space: An Introduction to Astronautics and an editor of Human Spaceflight: Mission Analysis and Design, was head of the Department of Astronautics at the U. S. Air Force Academy for 14 years - his astronautics curriculum is the top undergraduate program in the country. He has over 41 years experience in the aerospace engineering business, including military space systems design and operations, numerous flying assignments, and a tour as Air Attaché to Germany. He's been responsible for teaching thousands of young men and women about a variety of space topics.
Dr. Michael DeLorenzo (BGen, USAF, retired) is Professor Emeritus at the United States Air Force Academy (USAFA) and former head of the USAFA Department of Astronautics with over 31 years of research and development experience in astronautical engineering. He has served in numerous Air Force science and engineering leadership positions to include the Vice Commander of the Air Force Research Laboratory, headquartered at Wright-Patterson AFB, OH. His doctoral research was conducted at Purdue University and specialized in the control of large flexible spacecraft.
Dr. Wayne Hallgren is a 1975 graduate of West Point, a retired Air Force Colonel, and President of Hallgren Associates, Inc. (HAI), a company dedicated to delivering the finest aeronautical engineering instruction available in the world! Wayne taught for 10 years in the Air Force Academy's Department of Aeronautics, including two years as the Deputy Department Head -- on his departure, he was their top ranked instructor. For five years, he was adjunct faculty to the Air Force Test Pilot School, where he twice won their "Outstanding Academic Instructor Award." Wayne retired from the Air Force as Associate Dean of the Air Force's Graduate School of Engineering and Management, Air Force Institute of Technology. He's an Associate Fellow of the American Institute of Aeronautics and Astronautics (AIAA) and co-author of an Introduction to Aircraft Flight Mechanics, winner of AIAA's 2006 Summerfield Book Award.

Mr. Gael Squibb is an internationally recognized expert in the field of space operations and space operations standards. He spent the majority of his career at the Jet Propulsion Laboratory rising to the position of Director for Telecommunications and Mission Operations. Gael is the editor of the recently published text, Cost-Effective Space Mission Operations, 2nd Ed. He has held many project management and operational positions at JPL, NASA Headquarters and ESA. He has over 38 years of experience in scientific operations and operations development and in 2004 was elected a member of the International Academy of Astronautics.

Mr. Skip Penny is a former Air Force space operator who spent 20 years in various line and staff positions along with being a commander at two Space Command units. His extensive operational experience ranges from satellite command and control, to optical and radar satellite tracking, to staff positions at NORAD/ADCOM, US Space Command, and Air Force Technical Applications Center. Upon retiring from the USAF, he spent nearly ten years in the design, development and early operation of the Iridium commercial communications satellite system. From there, he transitioned to work on GPS III. He has 36 years experience in System Engineering, satellite operations, and system development with recent emphasis on open systems architectures and Internet Protocol based system design. He has Masters degrees in Space Operations and Procurement Management.