Simon Edward John Walker (born 28 May 1953) is a businessman who is the lead non-executive director of the Department for International Trade.
He was Director General of the Institute of Directors from 2011 to 2016, having previously been Communications Secretary to HM Queen Elizabeth II and an advisor to former Prime Minister, John Major.
He was born and grew up in South Africa and has worked in media, politics and business in New Zealand, Belgium and the UK.