This is an open-label, single arm, Phase 1, first-in-human (FIH) study to evaluate the safety and tolerability of SC262 administered intravenously (IV) following a standard lymphodepleting chemotherapy regimen of cyclophosphamide and fludarabine in subjects with Non Hodgkin's Lymphoma (NHL) who have received no more than 1 prior CD19-directed Chimeric Antigen Receptor T-Cells (CAR T) cell therapy. This study will be conducted in 2 parts. Dose finding using a 3+3 design in subjects with NHL. Dose expansion to further evaluate safety and efficacy at the recommended phase 2 dose (RP2D) in subjects with Large B-Cell Lymphoma (LBCL).