He will also take responsibility for the company's 'strategic wellness unit' – set up to position Nestlé as a 'nutrition, health and wellness company'.
Head of internal communications and CSR Ian Rayson has taken charge of corporate affairs alongside his current role.
Walsh and Rayson both report to Nestlé UK & Ireland CEO Alastair Sykes. They will work alongside Hudson until he leaves the post he has held for the past ten years in December.
Last month Nestlé reported that it expected to meet its sales targets – suggesting it had coped better with high global commodity prices than rivals Danone and Cadbury Schweppes.