[5] He is one of the founding members of Bristol trip hop collective Massive Attack, with Daddy G (Grant Marshall), Tricky (Adrian Thaws) and Andrew Vowles, as a music producer and the only vocalist to feature on all their albums and EPs.

[7] From 1997 to 1998, Del Naja was the band's main producer in the recording sessions that made Mezzanine, Massive Attack's most commercially successful album,[8] selling nearly 4 million copies, with Neil Davidge as a sound engineer.

"Herculaneum", the title track for Italian director Matteo Garrone's 2008 award-winning film Gomorrah, based on the book by Roberto Saviano about organised crime in Naples, received the prize for best song at the David Di Donatello Awards.

[24][25][26] Del Naja and Massive Attack's producer Neil Davidge collaborated with United Visual Artists on the large scale installation Volume at London's V&A museum in 2006.

In the exhibition, alternative flags of the British Commonwealth were recoloured in the anarchist red and black and hung from the ceiling of the Royal Festival Hall main floor.

[32] A multi-medium show conceived and designed by Del Naja and filmmaker Adam Curtis – in collaboration with United Visual Artists (UVA) – premiered in Manchester in July 2013.

[35] During the COVID lockdown, on 19 May 2020 Del Naja launched his Fire Sale website store, selling Protection, a limited-edition print, in aid of the Bristol Food Union.

[41] The "sensory remixer" lets people create unique versions of tracks, with the app taking into account variables like movement, time of day or night, location and what a user's phone camera can see.

An Apple Watch version of the app that varies the song's rhythm and harmony based on heartbeat was developed, while live social media notifications sent via a Twitter feed triggered alternative real time mix events.

Del Naja was cited by local media as saying that the other candidates had only party political agendas at heart and a newly elected mayor needed more imagination to help implement creative projects for Bristol.

[54] In July 2014, Del Naja and Grant Marshall visited the Bourj el-Barajneh refugee camp in Lebanon to meet with Palestinian volunteers at an educational centre.

[58] In July and October 2019, the group protested in 60 other cities worldwide and Del Naja provided a portable radio network using speakers in backpacks with receivers and transmitters for the campaigners in London.

[59] Massive Attack concluded their Mezzanine XXI tour of the US in October by organising a benefit gig at Webster Hall in NYC to help pay protestors' legal fees.

[60] In November 2019, along with other public figures, Massive Attack signed a letter supporting Labour Party leader Jeremy Corbyn describing him as "a beacon of hope in the struggle against emergent far-right nationalism, xenophobia and racism in much of the democratic world" and endorsed him in the 2019 UK general election.

[61] On 28 November 2019, Del Naja announced that Massive Attack partnered with a research centre based at the University of Manchester to explore the music industry's climate impact.

He wrote in a column in The Guardian: "The commissioning of the renowned Tyndall Centre for Climate Change Research to map the full carbon footprint of typical tour cycles, and to look specifically at the three key areas where CO2 emissions in our sector are generated".

[62] In May 2020, during the Covid-19 lockdown, 3D called for more government support to be given to those in food poverty after a print fundraising sale in his home town of Bristol raised more than £100,000 to help feed frontline workers and at-risk groups.

[63] During the spring 2020, 3D also worked on a Massive Attack political audiovisual EP called Eutopia, consisting of 3 track fusion created across 5 cities during the Covid-19 global lockdown period, with documentary filmmaker Mark Donne, AI art pioneer Mario Klingemann and vocal collaborations with Algiers, Young Fathers and poet Saul Williams.