The company also said that Vikram Grover will take charge as Deputy Head of TGB's water business, with immediate effect.
In addition, Grover will also have overall responsibility for TGB's businesses in Pakistan and Bangladesh, TGB said in a statement.
Dash, who will be based out of Bangalore, has handled various strategic and operational roles in the company for over the past 14 years.
In his most recent role, he was the Global Brand Director of TGB, it added.
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In a separate statement, Tata Coffee said its Board of Directors of Tata have approved the appointment of Sanjiv Sarin as 'CEO designate' with effect from January 8, 2015.
Sarin will assume charge as CEO and MD of Tata Coffee Limited upon the retirement of Hameed Huq, the current CEO and MD, the company added.
Sarin has held the position of Regional President- South Asia of Tata Global Beverages for the past four years. During his tenure, he has significantly strengthened Tata Global Beverages' position in the India branded tea market. He has over 38 years of experience in a variety of significant roles.