Abstract: Recently, the single electron spin of a defect in diamond known as the nitrogen-vacancy (NV) center has emerged as a versatile nanoscale magnetometer capable of operation in extreme environments and at diverse interfaces. In this seminar, I will highlight my group’s efforts to leverage NV quantum sensing for the high resolution imaging and detection of dynamical magnetization responses in 2D layered magnetic materials, which are difficult to probe by alternative techniques. We introduce novel quantum-enabled protocols to measure the ac magnetic susceptibility and optically-induced magnetization dynamics in atomically thin magnets. Moreover, we demonstrate the switching and detection of antiphase even-layer states in a 2D A-type antiferromagnet. This control over antiferromagnetic domains enables multilevel exchange bias on connected ferromagnetic-like regions through lateral exchange coupling. NV quantum sensors thus open a unique lens for understanding and controlling 2D magnetism for spintronic technologies.