Eventually he became an in-demand studio musician, arranger, ethnic woodwind player, sound designer, synthesist and music programmer in Los Angeles and New York City.
He worked on films and records before landing his first solo composing project, scoring the TV drama series Homicide: Life On The Street for director Barry Levinson.
Since then he has scored a number of other films and television projects with directors such as Ridley Scott, Steven Spielberg, Wong Kar-wai, Robert Altman, Steven Soderbergh, Mark Pellington, Stephen Hopkins, Jonathan Demme, Frank Darabont and many others.
Rona has performed with the Eastern fusion ensemble Axiom of Choice and appears on their Narada records.
His music is on the Transplanet series on Triloka Records, the electronica compilation "Leaves From The Tree", and "Elysium For the Brave" (by Persian singer Azam Ali).