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Rana, a 14-year Microsoft vet, is spearheading cloud infrastructure services in Azure. Among the technologies with which he and his team are working: Distributed monitoring and analysis systems; program analysis infrastructures; tools for correctness, performance, testing and diagnosis; and security of distributed systems. Rana started the Programmer Productivity Research Center Reliability Research Group working on static program analysis tools like PREfix, PREfast and ESP. In 2005, he was appointed to head up Vista Engineering, leading the "Longhorn Reset" planning, Windows build architecture and Vista Quality Gates efforts.