James O'Sullivan worked with us as a PostDoc from February 2021 to July 2023 with focus on quantum optics interactions in superconducting circuits. He obtained an MPhys degree in physics from the University of Oxford and a PhD in quantum condensed matter physics from University College London, during which he focused on coupling superconducting resonators to ensembles of spins to create a quantum memory. After leaving our group, he joined the Quantronics Group at CEA-Saclay as Junior Chair for Hybrid Quantum Devices.