In 1996, Madden started
Good Charlotte with his twin brother Joel. While still playing in Good Charlotte, both Madden brothers wrote and produced for other artists. Madden was a co-writer and co-producer of some of the songs on
Hilary Duff's
Most Wanted (2005) compilation album. He later helped write the songs "
Amnesia" for the pop rock band
5 Seconds of Summer and "No Ordinary Girl" for pop artist
Kalin and Myles. He has appeared as a back-up vocalist for artists such as
MxPx,
Kill Hannah,
Apoptygma Berzerk,
Mest,
The 69 Eyes,
Sean Kingston,
Three 6 Mafia,
Chamillionaire, and
Matisyahu. Madden started the fashion line called Made Clothing in 2001, along with his brothers Joel and Josh. In early 2006, it became DCMA Collective. A DCMA Collective store opened in Los Angeles on March 15, 2008, but later closed. On April 3, 2010, Madden took part in a boxing match against
MTV and
VH1 host
Riki Rachtman at Ellismania 5: Get These Brawls. The event was hosted by
Jason Ellis at
The Joint in the
Hard Rock Hotel and Casino in Las Vegas. Madden beat Rachtman by knockout at 1 minute and 42 seconds into the first round. On November 11, 2011, Madden and his brother Joel Madden released a free mix-tape, "The Madden Brothers: Before Volume 1". It contains new artists the brothers were personally interested in. Their brother Josh Madden helped to produce the mix-tape. Then unknown rappers,
Machine Gun Kelly,
Rockie Fresh,
Kreayshawn,
Casey Veggies, HXLT, and
Wiz Khalifa all appeared on the mix-tape. In 2012, Benji appeared on the TV show
The Voice Australia, alongside Joel as joint mentor-judges. In early 2013, Benji helped write
Tonight Alive's song "Breakdown". He sang back-up vocals at the end of the song and made an appearance in the video. In 2014, electronic dance music artist TJR released his track "Come Back Down", which features Benji on the track's vocals.
The Madden Brothers recording "Greetings from California" was released on September 16, 2014. In mid-2014, both of the Madden brothers appeared as coaches on
The Voice Kids Australia in a double chair, after the example of the Dutch
The Voice of Holland and
The Voice Kids Holland edition in which the singer's duo
Nick & Simon appeared as a judging duo between 2010 and 2015. In early 2015, Benji joined Joel as a coach on the main edition of
The Voice, bringing the number of coaches up to five. In 2015 Madden and his two brothers formally started their company MDDN, of which Benji is CEO, offering artist management, artist development and creative services. The company gained success quickly with the brothers taking management of Jessie J, Chase Atlantic, Architects, Bad Omens, Waterparks, Eyedress, Poppy and More. Madden and his brother Joel co-founded the streaming platform Veeps in 2017, and are co-CEOs.
Live Nation Entertainment acquired a majority stake in the platform in January 2021. == Discography ==