Lamjarred developed an early interest in music at age four and started to sing his father’s songs. He attended the Conservatory of Music in Rabat, where he studied music theory. In 2007, he placed second on Super Star, a widely popular Arabic television show.
In 2011, Lamjarred started his acting career, playing the male lead in Ahlam Nassim, a Moroccan soap opera. He released an album in 2013, entitled Wala Alik. That same year, he released two more albums, namely Salina and Enty. The title song of the latter, "Enty Baghya Wahad", became one of Lamjarred’s biggest hits and earned him an award at the Méditel Morocco Music Awards 2014.
His 2013 hit single, "Mal Hbibi Malou", has garnered more than 103 million views on YouTube.
Saad was also nominated for the Best Middle East Act at the 2014 MTV Europe Music Awards. He won the Murex d'Or in the category of "Best Arabic Song" for his 2014 song "Enty Baghya Wahad".
His 2015 hit single, "LM3ALLEM" (Arabic: لمعلم), earned Guinness World Record achievement after garnering 100 million views on YouTube within three months of release. As of November 2015, the video is the most viewed Arabic video on YouTube and it has garnered more than 233 million views.