[7] To earn money he did various jobs: he unloaded freight cars on railroad stations, worked as a subscription collector for Radio Belgrade, worked as a milkman, and appeared as a background actor in Yugoslav Drama Theatre and in several Yugoslav films: Svi na more (Everybody to the Seaside), Anikina vremena (Anika's Time), Sumnjivo lice (Suspicious Person), Pesma sa Kumbare (The Song from Kumbara).

[7] Marjanović started his musical career in 1954, when he appeared on an audition for amateur singers, organized by the Association of Jazz Musicians of Serbia, singing the songs "Mulen ruž" ("Moulin Rouge") and "Usamljeni gaučo" ("The Lonely Gaucho").

[1] Despite all that, the primo uomo of Belgrade Opera Darko Pivnički, who worked with young talents, decided to give singing lessons to Marjanović for free.

[1] The large popularity Marjanović enjoyed enabled him to record his first release, the album Muzika za igru (Music for Dancing).

[1] Marjanović recorded the album with the band Plavi Ansambl (The Blue Ensemble), which at the time consisted of Eduard Sađil (tenor saxophone), Petar Sam (accordion), Tripo Simonuti (violin), Đorđe Debač (piano), Vladimir Vitas (vibraphone), Sveta Jakovljević (guitar), Milan Mihajlović (double bass), Aleksandar Kosanović (drums) and Rade Jovanović (bongo drums).

[1] After the announcer Dušan Vidak read the jury's decision and the names of the awarded singers, the audience got enraged by the fact that Marjanović was not among them.

The audience started booing, chanting Marjanović's name and leaving the Hall, while the confused announcer proclaimed that the radio and television transmission had to be interrupted due to technical problems.

[1] Concurrently with the film release, Marjanović held eleven sold-out concerts in a row in the Trade Union Hall.

He appeared on the stage dressed in leather, inspired by the image of Gene Vincent, performing foreign rock and roll hits.

At the peak of his popularity in the Soviet Union he held fifteen concerts in a row at the Lenin Stadium in Moscow, performing every evening in front of approximately 15,000 people.

[1] During his tours in Soviet Union he performed French chansons, Italian canzones, but also covers of songs by Bob Dylan, The Beatles, The Mamas & the Papas, The Animals and other rock acts.

[1] He was awarded for "empowerment of friendly relations between Soviet and Yugoslav youth" and in 1968 he was proclaimed an Honorary Member of Komsomol.

[1] During the 1960s, Marjanović remained one of the most popular singers in Yugoslavia, releasing hit songs "Potraži me u pregrađu" ("Search for Me in the Suburbs"), "Da čekić imam ja" ("If I Had a Hammer"), "Medison u Meksiko" ("Madison in Mexico"), "Romana" and others.

[13] On a 1982 concert in the Trade Union Hall the audience by voting chose the songs to be released on the 1982 album Dvadeset nikada više (Twenty Never Again).

[13] During the following decades up until his death, Marjanović did not record new material and would appear live occasionally only, usually as a guest on festivals and other musicians' concerts.

[19] On 28 June (Serbian national holiday Vidovdan) 2021, he was posthumously awarded the 1st class Order of Karađorđe's Star by the President of Serbia.

Đorđe was the first rocker of this region, maybe not by the content of his songs, but by his approach to every one of his performances, by his manners and by his attitude towards the people who came to listen to him.

Everyone was both the performer and the member of the audience, there wasn't the fourth wall, there was only faith and immense love wherever Đorđe appeared.

In 1994, a concert entitled Rokeri Đorđu Marjanoviću (Rockers to Đorđe Marjanović) was held in Trade Union Hall.

The concert featured Dejan Cukić, Milan Delčić, Žika Milenković, Ruž, Rambo Amadeus and other acts performing Marjanović's songs.

[22] In 1999, Radio Television of Serbia broadcast a documentary about Marjanović, entitled K'o nekad u osam ("Like Before at Eight O'clock") after a verse from "Zvižduk u 8".

[25] Marjanović's version of Dionysis Savvopoulos song "Dirlada" was covered by Serbian and Yugoslav rock musician Milan Delčić in 1994.

[26] Marjanović's song "Đavoli" ("Devils") was covered in 1999 by Serbian alternative rock band Jarboli.