On 24 March 1999, Viggers returned to Bosnia as Commander Multi-National Division (South-West) in SFOR and was granted acting promotion to major general, substantive promotion followed on 1 September 1999 (with seniority from the date of his acting rank). For his service there, he was awarded the Queen's Commendation for Valuable Service on 3 November 2000. On 9 February 2000 he became Chief of Staff at Land Command and remained there until May 2003. He received a further honorary appointment on 11 May 2000 when he became Deputy Colonel Commandant of the Adjutant General's Corps. In May 2003 he was appointed Senior British Military Representative and Deputy Commanding General, Multinational Force, Iraq, based in Baghdad following its occupation by US and British forces; for his service there he was appointed a Companion of the Order of St Michael and St George on 23 April 2004. His next post was as Military Secretary and Chief Executive Army Personnel Centre, which he took up on 20 October 2003.