In 1982, he defended his dissertation for the Candidate's Degree (Ph.D. equivalent) in Physical and Mathematical Sciences on "Investigation of the mechanisms of scattering of conduction electrons in metal point contacts" (Research supervisor I.K.

In 2001, he defended his second dissertation for the Doctor's Degree in Physical and Mathematical Sciences with a thesis titled: "Point contact spectroscopy of highly correlated electronic systems".

[3][4] The main field of Naidyuk's scientific research is the study of the interaction of conduction electrons with quasiparticle excitations in solids using the method of point contact spectroscopy; research of strongly correlated electronic systems and point contact spectroscopy of topical superconductors, including promising ones such as magnesium diboride, rare-earth nickel-borocarbide compounds, newest iron-based superconductors, and topological semimetals.

Naidyuk has been researching electronic transport in point contacts at ultrahigh current densities and strong electric fields at low temperatures, charge and spin transfer processes in nanoscale structures based on magnetically ordered compounds and materials.

Naidyuk is the author or co-author of over 120 scientific articles and three review publications indexed in SCOPUS and Web of Science databases.

For over five years, he worked in research centers such as The Grenoble High Magnetic Field Laboratory (France), Karlsruhe University (Germany), KTH Royal Institute of Technology in Stockholm (Sweden), The Institute of Experimental Physics of the Slovak Academy of Sciences in Košice (Slovakia), The University of Turku (Finland), Texas A&M University, College Station, TX (USA), The Leibniz Institute for Solid State and Materials Research Dresden (Germany).