Nope he is not. He runs nchain and research. 

Bitcoin Cash or any kind of mitosis/fork situation, requires a concept/proposal then a solid power of hashrate to get it off. The team of people behind it took several ideas and just implemented upon getting confirmation from several mining pools that were interested. 

The whole bitcoin code is open-source. Any person can attempt a fork/mitosis (I call it mitosis). And many did. But without enough power behind it, ie. securing the blockchain and getting the blockchain going, ie. keeping it alive, is vital, and that part require miners.