His brief is to help SIBA raise its status and influence in the drinks industry.
Grocock, who starts his new role on Aug 20, said: "I have a passion for British beer and I'm dedicated to its survival and to the prosperity of its individual champions. Now is the time for SIBA to demonstrate that it speaks for the independent brewing sector with a powerful voice and to show that it has a coherent and cohesive plan for the development of the beer industry."
Earlier this year, the group signed a deal with Thresher to help the off-licence chain stock local beers in up to 2,000 of its shops through its Direct Delivery Scheme.
SIBA has 400 brewing members, ranging from long-established regional companies to small-to-medium-sized local operations set up over the past 30 years.