Alejandro will carry out quantum optics experiments on SiV impurities at UCAM and be seconded to TUD to learn advanced techniques in spin-spin entanglement; collaborate with UKON on theory of SiV spin coherence; work with E6 on fabrication of high-purity diamond by CVD and ion implantation techniques; work with Attocube, JPE (Janssen) and USFD on advanced nano-positioning techniques and development of tunable microcavities.