Currently, Dr. Praja works at Department of Microbiology, Faculty of Medicine, Universitas Palangka Raya, Indonesia. He earned PhD in Biomedical Sciences (Immunology) from Khon Kaen University, Thailand. Previously, he received a professional degree as a Doctor of Veterinary Medicine and Master's Degree in Biomedical Sciences from Udayana University, Indonesia. His works mainly focus on ATR-FTIR-based biomarker discovery in aging as well as signaling pathway in senescent CD4+ T cells.