Bryan Cantrill is the CTO at Joyent, where he oversees worldwide development of the SmartOS and SmartDataCenter platforms, and the Node.js platform. Prior to joining Joyent, Bryan served as a Distinguished Engineer at Sun Microsystems, where he spent over a decade working on system software, from the guts of the kernel to client-code on the browser. In particular, he co-designed and implemented DTrace, a facility for dynamic instrumentation of production systems that won the Wall Street Journal's top Technology Innovation Award in 2006 and the USENIX Software Tools User Group Award in 2008. Bryan also co-founded the Fishworks group at Sun, where he designed and implemented the DTrace-based analytics facility for the Sun Storage 7000 series of appliances.

Bryan received the Sc.B. magna cum laude with honors in Computer Science from Brown University.