Mumbai: Tata Sons, the holding firm of the Tata Group, has announced a slew of organizational changes.

It has appointed S. Padmanabhan as the group human resources (HR Head) head. This will be in addition to his existing responsibilities of leading the Tata Business Excellence Group.

Mukund Rajan will continue to be responsible for ethics and sustainability, and will take additional responsibility of overseeing the operations of the overseas representative offices of Tata Sons in the US, Singapore, Dubai and China.

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Harish Bhat, in addition to his responsibilities for marketing and customer centricity, will henceforth also be responsible for managing the Tata brand.

In the interim, he will oversee the functions of strategy and business development. Gopichand Katragadda will continue to be the group chief technology officer.

Sanjay Singh will oversee the public affairs function out of the Delhi office.

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Nirmalya Kumar, N. S. Rajan and Madhu Kannan have decided to explore options outside Tata Sons and have left the services of the company, Tata Sons said in a statement.

The three were part of the five-member group executive council (GEC).

The GEC was disbanded on 24 October after the removal of Cyrus P. Mistry as the chairman of Tata Sons.