Silvester will start in the role after Easter, replacing Robert Oxley, who is joining Business for Britain (BfB), an organisation campaigning on behalf of businesses for a renegotiation of the UK’s relationship with the European Union, as campaign director.
BfB’s outgoing campaign director Dylan Sharpe is joining The Sun as head of PR.
Silvester joined the IoD in May 2012 and was responsible for co-ordinating communication with parliamentarians and stakeholders.
At the TaxPayers’ Alliance he will be the principal point of contact for press quotes, interview bids and other media enquiries.
The organisation also recently hired Dia Chakravarty and Sonia Khan as political director and campaign manager (grassroots) respectively.