Guray Ozen works on compiler and runtime-based accelerator programming systems as a researcher on the programming models team of the Barcelona Supercomputing Center. The aim of his research is to investigate how to improve parallelisation of existing sequential applications by using static or dynamic compilation pipelines. His research also explores programming languages in order to exploit accelerators. He is also the creator of current implementation of the MACC compiler, which supports OpenMP 4.5 directives for automatic GPU offloading. MACC, yet another research compiler to investigate directive-based OpenMP accelerator model for GPUs, is built on top of the Mercurium source-to-source compiler framework and supports OmpSs and almost all directives of the OpenMP accelerator model for GPU.