Nelsons has conducted around the globe, including throughout Europe, the U.S. and Japan. He served as principal conductor of the Latvian National Opera from 2003-2007. In 2006, he took on a second important post, this one as chief conductor of the Herford, Germany-based Nordwestdeutsche Philharmonie, a position he held until 2009. From 2007, Nelsons began making regular appearances in the U.K., and that September was named music director of the City of Birmingham Symphony Orchestra, beginning in the 2008-2009 season. He held this post until the conclusion of the 2014-2015 season. 2009 saw Nelsons debut at the Met, leading a performance of Puccini's Turandot. The following year, Nelsons made his debut at the Bayreuth Festival with a production of Wagner's Lohengrin; this followed a concert performance given in Birmingham with the CBSO. In 2011, a highly praised reading of Mahler’s Ninth Symphony at Carnegie Hall with the Boston Symphony Orchestra marked two more important debuts for Nelsons; this was his first performance at Carnegie Hall and his first time leading the BSO. Nelsons was named the BSO’s 15th music director in 2014, after several years of guest conducting. In 2018, Nelsons was named the 21st Gewandhauskapellmeister (music director) of the Gewandhausorchester Leipzig.