Yan Pascal Tortelier (born 19 April 1947) is a French conductor and violinist. Born in Paris, he is the son of the cellist Paul Tortelier, and the brother of Maria de la Pau. Tortelier began piano and violin studies at age 4. At age 14, he was a first-prize winner for violin at the Paris Conservatoire.
Tortelier has worked and recorded extensively in the United Kingdom. He was principal conductor of the Ulster Orchestra from 1989 to 1992. He served as Principal Conductor of the BBC Philharmonic Orchestra in Manchester from 1992 to 2003, and now has the title of conductor emeritus with the orchestra. He has also been a Principal Guest Conductor of the National Youth Orchestra of Great Britain (NYOGB).
Tortelier served as Principal Guest Conductor of the Pittsburgh Symphony Orchestra from 2005 to 2008. He was principal conductor of the Orquestra Sinfônica do Estado de São Paulo (OSESP) from 2009 to 2011, and had the title of honorary guest conductor with the OSESP from 2011 to 2013. Tortelier first guest-conducted the Iceland Symphony Orchestra (ISO) in 1998. In October 2015, the ISO announced the appointment of Tortelier as its next chief conductor, effective with the 2016-2017 season, with an initial contract of 3 years.
Tortelier's recordings include his own orchestration of Ravel's Trio. He is a regular recording artist for Chandos Records, and has conducted commercial recordings for Chandos with the BBC Philharmonic, the BBC Symphony Orchestra, and the OSESP.