Hillery is CTO of IBM Cloud. Prior to this role, she served as Director of Accelerated Cognitive Infrastructure in IBM Research, leading a team doing cross-stack (hardware through software) optimization of AI workloads, producing productivity breakthroughs of 40x and greater which were transferred into IBM product offerings. Her technical interests have always been interdisciplinary, spanning from silicon technology through system software, and she has served in technical and leadership roles in memory technology, Systems for AI, and other areas. She is a member of the IBM Academy of Technology. She was appointed as an IBM Fellow in 2017.