Sosa joined forces with other creatives and operated through Sapienstoonz Producciones from 2005 to 2011. Internationally, he has been represented by agencies and production studios like Glasshouse Graphics, Space Goat Productions and Caricatures Now in the USA, Agence Undergram in France, and since 2018 by Joaquin García's Radebu in Barcelona, Spain. Most of his US comic book work has appeared through smaller indie labels and digital comics portals. For Arcana Comics, he illustrated 'Koni Konfidential' (2012), a comic book about supernatural mysteries at a Honolulu high school, written by Mark Poulton. He also drew for Freazie White, Jr.'s 'KnightPriest' (2010) at Mega Comics and was co-artist with Merbitt of 'Fleischer' (2012), a 'Superman' parody written by Edward Gross and Leon McKenzie for Bluewater Productions.