Gernot Heiser (born 1957) is a Scientia Professor and the John Lions Chair for operating systems at the University of New South Wales (UNSW). He is also leader of the Software Systems Research Group (SSRG) at NICTA. In 2006 he co-founded Open Kernel Labs (OK Labs, acquired in 2012 by General Dynamics) to commercialise his L4 microkernel technology.