Danny Chen started his career almost 40 years ago as a UNIX performance engineer at Bell Laboratories where he was a co-developer of one of first general purpose UNIX kernel tracing facilities (USENIX/1988: CASPER the Friendly Daemon). He also contributed performance improvements to the SVR4 virtual memory implementation (USENIX/1990: "Insuring Improved VM Performance - Some No-Fault Policies). He has worked on low latency market data systems, messaging systems, distributed transaction management, capacity planning, and enterprise systems monitoring.