At Intel, he directs the core architecture of Intel Array Building Blocks. Stefanus acts as the Secretary for the C++ Working Group (ISO JTC1/SC22/WG21, INCITS PL22.1) and participates actively on the C++ working group. Previously, Stefanus was a co-founder and chief architect at RapidMind Inc., a parallel programming company acquired by Intel in 2009, and an active participant of the OpenCL working group. Stefanus holds a BMath in Computer Science from the University of Waterloo.