Rafael maintains the Linux kernel's core ACPI and power management code, including the core infrastructure for IO device PM, CPU PM and system suspend/hibernation. He works at Intel Open Source Technology Center as a Software Engineer focusing on the mainline Linux kernel. Rafael has been actively contributing to Linux since 2005, in particular to the kernel's power management subsystems (system suspend/hibernation, device runtime PM framework, PM QoS, cpufreq, cpuidle), hot-plug infrastructure, ACPI core and PCI core. Since 2008 Rafael has given multiple presentations at various Linux Foundation conferences and other Linux-related events, including the Linux Foundation Collaboration Summit, LinuxCon (North America/Japan/Europe), the Linux Plumbers Conference, Linux.conf.au, LinuxTag, and Ottawa Linux Symposium. Rafael holds a PhD in Physics from the University of Warsaw, Poland (2002).