Dr. Maciej Cytowski joined Pawsey in 2017 as a Supercomputing Application Specialist and holds a PhD in Computational Science. He is currently the Head of Scientific Services at Pawsey Centre. He is a mathematician and computational scientist and has expertise in optimisation and development of applications on massively parallel and accelerated HPC systems. Since 2004 he has been involved in many HPC projects including porting weather prediction codes to Cray X1e vector architecture, accelerating astrophysical computational kernels on IBM Cell processors, optimisation of open-source simulation codes on IBM Power7 architecture and developing scalable codes on IBM Blue Gene/Q, Cray XC40.