Help define the security properties and architecture for the next-generation operating system. Design and implement new approaches to code signing, execution monitoring, and malware mitigation to help protect our customers while enabling Apple to develop one of the richest platforms on the market. Come up with new and innovative ways of increasing security and privacy while preserving ease-of-use and growing the quality of the user experience. Work cooperatively with other parts of Apple on technologies and initiatives to improve security and drive the adoption of these technologies across the organization.