Robert Rosen, known professionally as Robert Ozn and OZN (pronounced "OH zen"), began his career as a child soloist with the New York City Metropolitan Opera Children's Chorus, where he performed in seven productions over two seasons alongside renowned artists such as Leontyne Price, Renata Tebaldi, Richard Tucker, Robert Merrill, and Justino Diaz. His experience included collaborations with notable directors like Franco Zefferelli and Sir Tyrone Guthrie, as well as conductor Fausto Claver. At just 19 years old, he starred alongside Zero Mostel in a tour of "A Funny Thing Happened on the Way to the Forum." Shortly thereafter, he became a member of the Tonight Show Band with Doc Severinsen, performing on the road with jazz legends Ed Shaughnnessy and Lew Tabackin.

Ozn made his Broadway debut in the original cast of the Tony Award-winning musical "Shenandoah," where he created the role of Henry Anderson. Following appearances in two one-hour television dramas, "Quincy M.E." and "Eight is Enough," he returned to Broadway to join the original cast of the rock musical "Marlowe," where he originated the role of Fizer. His theatrical endeavors also included a tour of "Pirates of Penzance," where he portrayed Frederic alongside Karla DeVito.

In 1981, Ozn partnered with Ned Liben, the owner of Sundragon Recording Studios and an accomplished musician, to form the synth-pop duo Ēbn-Ōzn. They are credited with producing the first commercially released record ever made on a computer in the United States, "AEIOU Sometimes Y," which was released by Elektra Records in the U.S. and Arista in the U.K. The single received significant airplay on MTV, reached the Top 20 on the Billboard Club chart, and garnered worldwide attention in video, club, and radio formats. "AEIOU" featured a unique blend of spoken word, rap, orchestral synths, and dance beats, with its initial club spin by DJ Afrika Bambaataa in New York, ultimately bridging indie rock and urban radio. Their follow-up single, "Bag Lady," made it onto the Billboard Club Chart Top 40, and its video featured the late Emmy Award winner Imogene Coca. Ēbn-Ōzn's sole album, "Feeling Cavalier," reached the Top 20 on the College Radio Chart, and the group received positive reviews during their 1984 tour from major media outlets.

After the dissolution of Ēbn-Ōzn, Ozn relocated to Los Angeles and launched a solo project known as DaDa NaDa. In a time when rap was seldom performed by white artists except for the Beastie Boys, Ozn established DaDa NaDa as a House act, which allowed him substantial artistic freedom. The project achieved its first success on the Billboard Top 5 Club Chart in 1989 with the "hip house" track "Haunted House," co-produced and written by Ozn and Bob Greenberg, and mixed by Chicago-based House pioneer Mike "Hitman" Wilson. According to MTV News, this made Ozn the first white House artist to chart in the U.S. DaDa NaDa's second single, "Deep Love," also reached the Billboard Club Chart Top 5, produced and written by Ozn and Steve Wight, with mixes from Frankie Knuckles/David Morales and Bad Boy Bill. Primarily distributed through Ozn's indie label, One Voice Records in the U.S., DaDa NaDa also had a distribution deal with Polydor/UK for some of the "Deep Love" mixes. Other tracks released with limited availability included the downtempo "The Good Thing," written and produced by Ozn and Wight, and the House track "Give It All I Got," produced by Ozn and Greenberg and mixed by Bad Boy Bill. As with Ēbn-Ōzn, Robert Ozn gained considerable international club exposure and positive press. However, a shooting incident during a tour stop in Chicago in 1990 marked the end of his live performances for a time.

Subsequently, Ozn transitioned away from music and became a script analyst in Hollywood, collaborating with prominent figures such as Oliver Stone, Janet Yang, Miramax, James Cameron, Creative Artists Agency (CAA), Louis Malle, and Sydney Pollack. He penned the screenplays for "I Witness," starring Jeff Daniels, James Spader, and Portia de Rossi, also serving as the film's co-producer, and "Earth's Final Hours," featuring Bruce Davison for The SyFy Channel, under the pseudonym Robert Wescott. Additionally, he is credited as the Associate Producer for the documentary "Turned Towards the Sun," which chronicles the life of British aristocrat and war hero Micky Burn, MC.