Dr. Vishnivetskaya explores taxonomic and functional diversity of microorganisms in diverse extreme environments, such as (i) subfreezing perennially frozen soil called permafrost with sampling sites located in north-eastern Siberia, Svalbard, High Canadian Arctic, Antarctica, Kamchatka, Qinghai–Tibet Plateau; (ii) thermal sites from Yellowstone National Park and fumarole fields of high altitude areas; (iii) heavy metals and ammonium contaminated sites; (iv) microbiome; and (v) impact of temperature gradient on bacterial adaptability using Exiguobacterium and Gram-positive bacteria as a model. She investigates the biodiversity, species biogeography, and adaptation to extreme environmental conditions through a variety of bacteriology and high-throughput techniques.