Marriner was brieflyvlugtig a music'n teachermusiekonderwyser atby [[Eton College]] gewees.<ref> name=Guardian_obit </ref><ref> name=Telegraph_obit </ref> InHy 1948,het hein became1948 a'n professor ofby thedie RoyalKoninklike CollegeKollege ofvan Musiek Musicgeword.<ref> name=Telegraph_obit </ref> In 1948 orof 1949,hehet tookhy updie theposisie positionopgeneem ofvan secondtweede violinistviolis ofvan thedie Martin String QuartetStrykkwartet, continuingen tosou playvoortgaan withom thevir quartetdie forvolgende 13dertien yearsjaar saam met hulle te speel.<ref> name=Guardian_obit </ref><ref> name=Telegraph_obit </ref><ref> name=Scena_Musicale </ref> HeHy hadhet metdie the harpsichordist[[klavesimbel|klavesimbelspeler]] [[Thurston Dart]] whileontmoet recuperatingterwyl fromhy kidneyherstel damagehet duringvan thenierskade war,wat andhy theygedurende formeddie aoorlog opgedoen het en hulle het saam 'n duo together,gevorm whichwat expandedweldra touitgebrei thehet Virtuosotot Stringdie TrioVirtuoso withStryktrio met Peter Gibbs.<ref> name=Telegraph_obit </ref> TheseDit werewas thedie precursorsvoorganger totot ''Dart's Jacobean Ensemble'', in whichwaarin Marriner played fromvan 1951 af gespeel het.<ref> name=Guardian_obit </ref><ref> name=Telegraph_obit </ref> HeHy playedhet thedie violinviool in twotwee LondonLondense orchestras:orkeste thegespeel naamlik die [[Philharmonia Orchestra]] in thedie earlyvroeë 1950s, anden thedie [[LondonLonden Symphony Orchestra]]Simfonieorkes (LSO) as principalhoof secondtweede violinviool (1954–69).<ref> name=Guardian_obit </ref><ref> name=Scena_Musicale>{{cite news | url=http://www.scena.org/lsm/sm5-9/neville-en.htm | title=Sir Neville Marriner: Beyond the Academy | publisher=''Lo Scena Musicale'' | first=Anthony |last=Kirby | date=1 June 2000 | accessdate=2009-04-02}}</ref><ref>{{cite news | url=http://books.guardian.co.uk/review/story/0,,1146428,00.html | title=One hundred years of attitude | newspaper=The Guardian | first=Charlotte|last= Higgins | date=14 FebruaryFebruarie 2007 | accessdate=2007-09-06}}</ref> HeHy alsohet playedook withsaam themet [[chamberdie music|chamber]]kamerorkeste orchestras ofvan [[Reginald Jacques]] anden [[Boyd Neel]] gespeel, as wellsowel as thedie ''[[London Mozart Players]]''.<ref> name=Guardian_obit /><ref name=Telegraph_obit </ref>
In 1958, he founded the [[Academy of St Martin in the Fields]]; initially a twelve-member chamber ensemble, it soon expanded to a chamber orchestra, and attracted musicians of a high calibre including Dart, [[Iona Brown]], [[Christopher Hogwood]] and [[Alan Loveday]]. Marriner recorded prolifically with the Academy.<ref name="Siddique 2016" /><ref name=Guardian_obit /><ref name=Telegraph_obit /> The first recordings in the early 1960s, with Marriner both conducting and playing lead violin, were successful, leading [[Pierre Monteux]], then the LSO's conductor, to encourage Marriner to shift his focus to conducting.<ref name=Guardian_obit /> Marriner had studied the subject with Monteux at his school in [[Hancock, Maine]], in the United States, from around 1950.<ref name=Telegraph_obit /><ref>{{citation |url=http://monteuxschool.org/alumni/ |title=Alumni |publisher=[[Pierre Monteux School]] |accessdate=2 October 2016 }}</ref>
