WaveStone said Mr Bhuyan will join existing principals Graeme Burke, Catherine Allfrey and Ian Harding, and as a part of his appointment will hold equity in the firm.
Prior to his appointment, Mr Bhuyan was deputy head of Australian equities, growth team, at Colonial First State.
Mr Bhuyan has also held a variety of other roles, including senior analyst at Wilson HTM, head of research at ING Barings in India and vice president, research, at DSP Merrill Lynch in India.
WaveStone is supported by Fidante Partners, the multi-boutique funds management arm of Challenger.