Sir Lockwood served as a senior minister in various portfolios including Education, Agriculture, and Trade. Sir Lockwood also served as Deputy Minister of Finance, Minister of Forestry, Minister of Tourism, Minister Responsible for Contact Energy Ltd, Minister Responsible for the Education Review Office, and Minister Responsible for the National Library.
Sir Lockwood was elected Speaker of the House of Representatives in 2008 and three years later and was unanimously re-elected to the role a position he held until his retirement.
Prior to entering politics, Sir Lockwood was the New Zealand Dairy Board’s marketing manager for Central and South East Asia. He had previously been a university lecturer and also hosted educational children’s television shows in Australia and New Zealand.
Sir Lockwood is also Ambassador to Ireland and High Commissioner (Resident in the UK) to and Ghana and High Commissioner-Designate (Resident in the UK) to Nigeria.