Krzysztof Antoni Meissner

He continued his scientific work, defending his PhD thesis in 1989, habilitating in 1997 with a dissertation titled The Role of Symmetry of Noncritical Strings Theory in String Cosmology (Rola Symetrii Teorii Strun Niekrytycznych w Kosmologii Strunowej)[3] and becoming a professor in 2006.

He became the scientific director of the Institute of Nuclear Research in 2009, and after its transformation into National Centre of Nuclear Research, he continues to work there, although no longer as a scientific director.

[5] Krzysztof Meissner is openly religious, saying "Physicists, a theist and an atheist, use the same equations describing the same phenomenon and arrive at the same conclusions.

The difference is, one of them will say that it is a reflection of the perfect God, while the other will simply consider it the way things are.

In 2013, he was awarded the Order of Polonia Restituta by President of Poland, Bronisław Komorowski for outstanding contribution to research in the field of physics and to popularization of science.