Yoonjung received Ph.D. in biological sciences at Korea Advanced Institute of Science and Technology (KAIST) under professor Ji-joon Song, during which she unveiled the activation mechanism of H3K36 methyltransferase ASH1L by binding of MRG15 via X-ray crystallography-based protein structural analysis. During her Ph.D. course, she also completed a few projects in LC-MS/MS-based proteomics using orbitrap mass spectrometers at Korea Research Institute of Standards and Science (KRISS) under Dr. Eugene Jinhwan Lee. In 2021, she came to the United States for post-doctoral fellowship under professor Chan-Hyun Na at Johns Hopkins University, during which she applied proteomics technologies to study mainly neurodegenerative diseases using various types of tissue/aqueous samples. In 2022, she joined Moritz lab as post-doctoral fellow.