MEET OUR TEAM

Christopher M. Hearsey

Christopher M. Hearsey is the Founder & CEO of OSA Consulting, LLC. Chris has over ten years experience in the aerospace and nonprofit sectors previously serving as the Director of DC Operations and Corporate Counsel for Bigelow Aerospace and Deputy CEO and Chair of the Board of Directors for the Astrosociology Research Institute.

Chris also served as Special Assistant to the Director in the Office of Space & Advanced Technology at the US Department of State and has managed political campaigns at the state and federal level, including a run for Congress in Maryland in 2018. Chris holds a BA in Mathematical Economics & Political Science and minor in Physics from Temple University, a MS in Legal Theory from The American University, a MS in Space Studies from the University of North Dakota, and a JD with honors in Air & Space Law from the University of Mississippi School of Law.

As a student, Chris held a graduate fellowship in space history at the National Air & Space Museum in Washington, DC, and studied Public International Law at Downing College, Cambridge University.Since law school, Chris has served as a coach, advisor, and judge for the Philip C. Jessup International Law Moot Court Competition and as a student competitor, coach, advisor, and judge of the Manfred Lachs Space Law Moot Court Competition. Chris lives in Maryland with his family.

Nathan Johnson
Nathan Johnson is an attorney licensed in Washington, DC, and publishes the blog and podcast AstroEsq. He graduated with his Juris Doctor from the George Washington University Law School, and received an LL.M from the University of Nebraska College of Law in Space, Cyber, and Telecommunications Law. He worked at the FAA Office of Commercial Space Transportation during SpaceX’s first berth with the International Space Station, and for the US House of Representatives’ Committee on Science, Space, and Technology during deliberation on human spaceflight regulation. He has published articles on orbital debris removal, on-orbit liability, and outer space property rights. He is also the Regional Organizer for the Manfred Lachs North America Space Law Moot Court Competition.
Chris Tkach
Chris Tkach is a veteran of the United States Marine Corps. While serving overseas Chris worked with many NGO’s and other international organizations. Upon his return to the states he spent a decade serving his local populations as a firefighter and emergency medical technician. Chris received his education from the Ohio State University College of Engineering.​
Jessica Noble
Jessica Noble serves as in-house counsel for NanoRacks, LLC, a leader in the commercial utilization of low-earth orbit. She advises on a variety of topics including contract drafting and negotiation, corporate structure, and export control. Prior to her time with NanoRacks, Jessica advised on space policy on Capitol Hill, served as a prosecutor in Southern New Mexico, and worked on satellite regulatory affairs for SES Networks and as a consultant with LMI Advisors. Jessica has been an active member of the space law community for the past eight years through activities such as volunteering as a judge for the Manfred Lachs Space Law Moot Court Competition, serving as the Research and Outreach Coordinator for the American Society of International Law’s Space Law Interest Group, and serving as Vice-Chair of the AIAA’s Legal Aspects of Aeronautics and Astronautics Outreach Committee. Jessica is a proud alumnus of the University of Florida and the Catholic University of America. She is also a proud dog-mom of a Weimaraner named Sandra Day O’Barker.​

Jonathan Kaley-Isley is a space lawyer and cybersecurity expert based in The Netherlands. He has a B.A. from the University of Florida, a Juris Doctorate (J.D.) from the Illinois Institute of Technology, and an Advanced Masters (LL.M.) in Aviation and Space Law from the University of Leiden. His Ph.D. research is focused on the ethical & normative regulation of AI and adaptive decision making technologies in outer space.

Jonathan has spent his career at the intersection of law and emerging technologies, directing global information governance, cybersecurity, and privacy programs at Visa, Barclays, Blackrock, and Vanguard. He taught computer science and security at the graduate level at the University of Denver, He is the former Director of the Center for Computer-Assisted Legal Instruction, and the former CIO of the National Multiple Sclerosis Society.

Jonathan directs production of the Space Court Law Library, the work of our law clerks and rapporteurs, and SCF special projects.

Dimitra Stefoudi teaches space law at the  International Institute of Air & Space Law of Leiden University. She focuses her research and teaching on space applications, cybersecurity and privacy in space activities, space resources governance, and is defending her PhD on the “Legal and Policy Aspects of Space Big Data” in May 2024, with the support of the Netherlands Space Office and the European Space Agency. Dimitra has significant experience in the regulation of space activities on national and international level and in advising on compliance with applicable legal regimes.

She holds an Adv. LL.M. in Air and Space Law from Leiden University, a Masters in International Business Law from Tilburg University, and a Bachelors in Law from the Law School of Athens. She has attended the ISU Space Studies Program in 2016 and is part of the ISU Teaching Faculty.

Dimitra participates at international conferences and speaks frequently about space law in public events. She is a member of the International Institute of Space Law, the European Center for Space Law, the Netherlands Space Society, the Greek New Space Society, and has been an Advisor of the Space Court Foundation.