He attended Hunter College High School on the Upper East Side of Manhattan, where his classmates included Chris Hayes[8] and Lin-Manuel Miranda, whom he bullied, although the two later became friends.

[4][11] After being paroled, he took political science classes at Baruch College in New York City for two semesters at the behest of his father, who allowed Coronel to live with him on the condition that he went to school.

[12] Honing his rapping skills in jail, and unable to find decent wage-paying employment after his release, he began selling his music on the streets of New York and battling with other MCs.

[13][14][15] This, coupled with his victories in numerous freestyle rap competitions of the New York underground hip hop scene such as Rocksteady Anniversary and Braggin Rites, led to his reputation as a ferocious Battle MC.

The following year, in September 2003, he received the coveted "Hip Hop Quotable" in The Source for a song entitled "Industrial Revolution" from his second album.

Emilee Woods, writing for RapReviews.com, reviewed the album positively, praising its "earnestly and skillfully delivered" material, and claiming that Technique had "finally found a comfort zone in the balance between lyricism and message.

In early 2006, the song "Impeach the President", featuring Dead Prez and Saigon turned up in the mixtape "Alive on Arrival" DJ Green Lantern.

In April 2009, a new song leaked on the internet named "Democratie Fasciste (Article 4)" by Brazilian-French rapper Rockin' Squat which featured Immortal Technique.

[21] The preview was released ahead of its September 21 launch on iTunes, as part of a web-campaign that included updates, promotion and links on forums, E-Magazines and several social networking sites.

[22] Immortal Technique visits prisons to speak to youth and working with immigrant-rights activists, and raising money for children's hospitals overseas.

[23] In June 2008, Immortal Technique partnered with Omeid International, a non-profit human rights organization, and dubbed the work as "The Green Light Project".

With the profits of the album The 3rd World, he traveled to Kabul, Afghanistan to help Omeid build an orphanage, the Amin Institute, without corporate or external funding.