Lei Chen is a Principal Member of Technical Staff at AMD. Colleagues describe them as "Lei was on our Power7 team working on performance modeling and improvement.  He brought in his research experience and expertise in computer architecture and proposed various design optimizations.  He modelled a number of branch prediction schemes and one of them was atractive enough to be included in the final design.  It was a very nice design point in that it doesn't affect the critical path and significantly improves prediction accuracy. It was great having him on my team and I would not hesitate to recommend him to anyone."