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Rico Mariani headshot.

Rico Mariani posts

As Deputy CISO for Microsoft Security, Rico Mariani is responsible for securing the Microsoft Security organization against threats. As a long-time technical leader at Microsoft, he has played a pivotal role in shaping the architecture and performance of some of Microsoft’s most foundational technologies, helping to define the Visual Studio development experience for millions of engineers worldwide. He led performance engineering for the .NET Framework, driving innovations that improved runtime efficiency and scalability across the .NET universe. His work on memory management and diagnostics has influenced generations of developers and continues to be referenced in engineering best practices. Beyond his contributions to Microsoft, Rico is an active speaker and writer in the broader tech community. Outside of work, Rico is a passionate advocate for STEM education and has supported initiatives to improve access for underrepresented groups.