Navy Lt. Wisniewski was born in Poland where he spent his early childhood until immigrating to San Diego, California in 1997. He attended San Diego State University where he earned a Bachelor of Arts degree in biology with a minor in religious studies. He went on to attend the Uniformed Services University of the Health Sciences in Bethesda, Maryland, where he earned his Medical Doctor degree. He completed internal medicine residency at the Naval Medical Center San Diego before completing his fellowship in infectious diseases at the same institution. He currently serves as an Infectious Disease Physician at the Naval Health Research Center, as Internal Medicine and Infectious Disease Faculty and as well as Associate Program Director in the Internal Medicine Residency Program at the Navy Medical Center San Diego. His research interests include Coccidioidomycosis and Tuberculosis.