Rafael maintains the Linux kernel’s power management infrastructure and the core ACPI support code. He works at Intel Open Source Technology Center and focuses on the mainline Linux kernel development. He has used and managed Linux-based systems since 1995 and he has been actively contributing to Linux since 2005, in particular to the kernel’s suspend/hibernate subsystem, power management in general (IO runtime PM framework, CPUFreq, CPUIdle, PM QoS, wakeup framework etc.), hot-plug infrastructure, ACPI support core and PCI core. Since 2008 he has presented at multiple Linux Foundation conferences and other Linux-related events, including Open Source Summit North America, the Linux Foundation Collaboration Summit, LinuxCon (North America/Japan/Europe), Linux Plumbers Conference, Linux.conf.au, LinuxTag, and Ottawa Linux Symposium. He holds a PhD in physics from the University of Warsaw, Poland (2002).