Throughout 1983, 1984 and 1985, Omar taught percussion to school-age children at the Escuela Provincial de Arte in Manzanillo and La Habana. In 1986 Omar founded the group TRIBUTO. During the next two years he provided musical arrangements for this ensemble and toured Angola, Nicaragua, Congo and Ethiopia. He also orchestrated and directed the music for two TRIBUTO recording projects.

In 1990 Omar formed the group XL TALLA EXTRA with Cuban vocalist Xiomara Laugart. He produced Laugart's record FE and toured with her in Mexico and Spain. In 1992 they participated in the closing ceremonies of the World Expo Sevilla '92.

In 1993 Omar moved to Quito, Ecuador. He formed and served as musical director and keyboardist for the jazz fusion-influenced group ENTRENOZ. Omar participated in the first Festival of Contemporary Andean Music with Orquesta Sinfónica Nacional del Ecuador. He also conducted a Cuban percussion workshop for the Banda Sinfónica del Municipio de Quito.

In 1995 Omar joined as keyboardist the group KOAN FUSSION in Palma de Mallorca, Spain. At the end of this year he moved to San Francisco and began playing keyboards for various Latin ensembles throughout the Bay Area. In 1996 Omar recorded his debut solo piano CD entitled Omar Omar with Oakland-based PriceClub Productions. He performed at the San Francisco Jazz Festival.

Also during 1997, Omar began his ongoing collaboration with noted Bay Area percussionist and educator John Santos. The duo released a live recording entitled Nfumbe (PCP1004) in conjunction with their appearance at the San Francisco Jazz Festival in 1998. The duo continues to tour in the United States, France and Germany.

Omar's second large-ensemble recording, Spirit Of The Roots (OTA1005), features over 30 musicians, including Cuban percussionists Pancho Quinto and Orestes Vilató. In this 1999 CD, Omar combines his musical roots in Cuban popular music and Yoruba spiritual practice with jazz, hip-hop, and music from the black folkloric tradition of Esmeraldas on the north coast of Ecuador. It is a passionate, playful and original work.

Over the past several years Omar has been touring extensively in France, as well as maintaining an active international performing schedule. The North Sea Jazz Festival remarked last year that Omar "will be ranked among the great wizards of the keyboard, with Chick Corea and George Duke". Other notable concert appearances include the JVC Jazz Festival in Paris, The Music Meeting in Holland, WOMEX in Berlin, and the San Francisco Jazz Festival, Mount Hood Festival of Jazz, and Monterey Jazz Festival in the United States.

Also last year, Omar released his second solo recording, Inside (OTA1006), an intimate and engaging set of solo piano improvisations. They are at times pensive and introspective, at times romantic, playful and delicate - always inventive and unpredictable. San Francisco music critic Derk Richardson concluded that "Sosa's album grants an unguarded glimpse into one artist's imagination, successfully negotiating that precarious path between the cerebral and the sentimental". 

Capping an extraordinarily productive year, Omar traveled to Quito, Ecuador, where he lived for several years in the early '90s, to record his CD, Bembón (OTA1007). Like his CDs Free Roots and Spirit Of The Roots, Omar's new large-ensemble recording is an amazing mix of Cuban, jazz, spoken word, and world music elements. Omar's is a World Jazz vision, gracefully weaving a tapestry of musical threads from Afro-Ecuadorian, Afro-Cuban and Afro-American traditions. His subtle fusion of rhythms, harmonies, voices and instruments is an exploration of Latin jazz beyond its traditional Cubop expressions. One Paris music critic described Omar as "a year 2000 mix of Thelonious Monk back from the beyond and Eddie Palmieri in the full-blown and innocent spirit of his youth". 

After a few years living in San Francisco, Omar moved to Barcelona, where he started to collaborate with Gnawa musicians.

In 2004, a collaborative album, Pictures of Soul, came out. It is an improvised music collaboration between Omar Sosa on piano and Los Angeles-based percussionist Adam Rudolph. These two creative musicians have enjoyed each other's work at a distance for several years. Both share an appreciation of ritual trance music. In April of 2002, when Sosa and his Septet arrived in Los Angeles for a run at the Jazz Bakery, it was possible for these kindred spirits to meet and make music together. The result is Pictures of Soul, a poignant aural journey into the transcendent realms of the creative music process.

Sosa and Rudolph both experience their art as an interactive spiritual voyage. Their approach in the studio called simply for an openness to explore musical landscapes together - without charts, without rehearsal. On Pictures of Soul Sosa plays mostly acoustic piano, both on the keys and inside the instrument. Rudolph is featured on an array of hand drums, including jembe, tarija, dumbek and tabla.

In 2007 he toured the United States with his new Afreecanos Quartet, where Sosa continues to explore the African roots of traditional musics throughout the African Diaspora, using modern jazz harmonies and the latest technology. The ensemble featured Cuban drummer Julio Barreto, Mozambican electric bassist Childo Tomas, and Senegalese vocalist Mola Sylla.

Accompanying the Afreecanos tour was a new live CD release titled Promise. Recorded in front of a live audience at the NDR radio studios in Hamburg, Germany, the CD features the Afreecanos Quartet, plus noted Italian trumpet player Paolo Fresu, and Cuban flute player Leandro Saint-Hill.

Omar Omar (Otá Records OTA1001, 1996)

Free Roots (Otá Records OTA 1003, 1997 )

Nfumbe for the Unseen, with John Santos Duo (Otá Records OTA 1004, 1998)

Spirit of the Roots (Otá Records OTA 1005, 1999)

Inside (Otá Records OTA 1006, 1999)

Bemb?n (Otá Records OTA 1007 2000)

Prietos (Otá Records OTA 1008 2001)

Sentir (Otá Records OTA 1009 2002)

Ayaguna (Otá Records OTA 1010, 2003)

A New Life (Otá Records OTA 1011, 2003)

Pictures of Soul (Ot? Records OTA 1012, 2004)

Mulatos (Ot? Records OTA 1014, 2004)

Ballads 1997-2000, compilation (Ot? OTA 1015, 2005)

Mulatos Remix (Ot? OTA 1016, 2006)

Live ? FIP (Ota Records, 2006)

Promise (2007)

Day Off EP 1, with Greg Landau (Six Degrees, 2007)

Day Off EP 2, with Greg Landau (Six Degrees, 2007)