Mariusz Mrózek received his M.Sc. degree in Physics from the Pedagogical University in Kraków in 2010 and in 2017 he received his Ph.D. from the Jagiellonian University in Kraków. His research was focused on negatively charged nitrogen-vacancy (NV) color centers in diamond. He studied the interaction of NVs with two, near-degenerate microwave fields (Coherent Population Oscillations). Also, he designed and constructed microstrip line antennas for generating circularly polarized microwave fields in order to better address particular NV spin states and transitions. He was also Physics teacher in a secondary school in Limanowa. Now, he is a postdoctoral fellow working on precision spectroscopy of magnetic resonance in nanodiamonds within the QUNNA project at the Jagiellonian University.