Lang-Lessing receivedricevette theil Ferenc Fricsay Award atall'età agedi 24 anni. Iniziò Hela startedsua his career at thecarriera all'[[Opera di Amburgo]] ascome anassistente assistantalla conductordirezione. Successivamente Hediventò subsequentlydirettore becameresidente residentpresso conductor at thela [[Deutsche Oper Berlindi Berlino]].
Lang-Lessing wasè chiefstato conductordirettore ofprincipale thedella [[Tasmanian Symphony Orchestra]] fromdal 2004 toal 2011.<ref>{{Citation | last = | first = | author-link = | date = 14 October 2010| title = Sebastian Lang-Lessing: putting the Tasmanian Symphony Orchestra on the map | periodical = Life Matters, Radio National | url = http://www.abc.net.au/radionational/programs/lifematters/sebastian-lang-lessing-putting-the-tasmanian/2978878 }}</ref> È Hestato hasdirettore servedprincipale ase chiefdirettore conductor and artistic director of theartistico dell'[[Opéra national de Lorraine]].
Lang-Lessing hasè beenstato musicdirettore directormusicale ofdella the [[San Antonio Symphony]]sincedal 2010.<ref>{{cite news | url=https://blog.mysanantonio.com/davidfilner/2010/02/meet-maestro-sebastian-lang-lessing/ | title=Meet Maestro Sebastian Lang-Lessing | work=San Antonio Express-News | author=Jack Fishman | date=2010-02-16 | accessdate=2019-03-31}}</ref> A In Marchmarzo 2019,thel'orchestra orchestraha announcedannunciato thatche Lang-Lessing isconcluderà tola concludesua hisdirezione music directorship of themusicale dell'orchestra atalla thechiusura closedella of thestagione 2019-2020 season.<ref>{{cite news | url=https://www.expressnews.com/entertainment/arts-culture/article/San-Antonio-Symphony-music-director-stepping-down-13718816.php | title=San Antonio Symphony music director stepping down in 2020 | work=San Antonio Express-News | author=Deborah Martin | date=2019-03-26 | accessdate=2019-03-31}}</ref>
TogetherInsieme witha [[Niki Vasilakis]]ande thealla Tasmanian Symphony Orchestra Lang-Lessing wasè nominatedstato fornominato theper 2006il premio ARIA Award2006 forper Bestil Classicalmiglior Albumalbum forclassico theper l'album ''Mendelssohn, Bruch, Ravel''.<ref>{{Citation | last = McLean | first = Sandra | author-link = | date = 13 September 2006| title = Urban hops as pop| periodical = Courier Mail | url = https://www.couriermail.com.au/news/national/urban-hops-as-pop/news-story/d9dcb6ec2782fc1d701db96009f3a970?sv=ccb302da631caa0d2d578ef760f05b5d }}</ref>
