Timothy Walker was appointed Chief Executive and Artistic Director of the London Philharmonic Orchestra in November 2002 and commenced work with the Orchestra in March 2003.

He was formerly the founder and CEO of World Orchestras, a company established to present an annual International Orchestras Season at the Sydney Opera House and Melbourne Concert Hall and prior to that General Manager of the Australian Chamber Orchestra (ACO) for ten years, between 1989 and 1999. Prior to taking on the head position at the ACO he was Marketing and Development Manager for two years and prior to that Concert Manager of the Canberra School of Music at the Australian National University from 1981 to 1987.

He has served a six year term on the Board of the International Society for the Performing Arts (ISPA) where he served as Secretary, Treasurer, member of the Executive Committee, Chair of the Development Committee and Chair of the Organising Committee of the 15th International Congress of ISPA held at the Sydney Opera House in 2001. 

He was an inaugural member of the Australian International Cultural Council, a director of the Tasmanian Symphony Orchestra and a member of the External Advisory Board of the Sydney Conservatorium of Music. He has also been Deputy Chair of the Music Council of Australia for six years and served on the Board of the Orchestral Network of Australia.  He is currently Chair of the Association of British Orchestras.