Lembit Sihver is the key foreign researcher and the director of the CRREAT project. He is a co-founder and CTO of the Cosmic Shielding Corporation (CSC) in the USA and until 2022 he was a Professor of Subatomic and Plasma Physics at Chalmers University of Technology in Sweden. He received his MSc at KTH in Sweden, and his Licentiate and Dr. of Technology (PhD) in Nuclear Chemistry/Nuclear Physics at Uppsala University, Sweden. 2002 – 2014, he was a full Professor and the Head of Nuclear Science and Engineering at Applied Physics at Chalmers University of Technology in Sweden. In 2015, he became a full Professor of Medical Radiation Physics with a Specialization in Ion Therapy, and Head of the Department of Radiation Physics, at Vienna Univ. of Technology in Austria. He was also the Head of Applied Medical Physics Research at the MedAustron ion beam therapy centre in Austria. He has 35 years experience of in teaching, and international R&D in nuclear physics, nuclear chemistry, material science, space radiation transport, protection and dosimetry. His current research is performed in very close collaboration with MIT and UTRGV in the USA. He is an active member of many international organizations and he is a co-author of more than 18o peer-reviewed scientific publications. He has also presented his work in more than 400 abstracts and peer-reviewed international conference papers.