After venturing out on his own, Mitrovic collaborated with Jon Batiste and The Blue Man Group to create the opening credits theme music for George Lopez's blockbuster Spare Parts (Lionsgate), starring Marisa Tomei and Jamie Lee Curtis.
[4] He then created the main titles theme music for Netflix original series Four Seasons in Havana.
These two engagements led Mitrovic to scoring numerous films and TV shows, including the Hollywood feature Manhattan Undying (Paramount Pictures), Donald Glover's Guava Island documentary series about Cuban prodigy musicians, and Marija Stojnic's Speak So I Can See You (Doc Fortnight, Museum of Modern Art, NYC).
Clients include TED (conference), Maker's Mark, Facebook, Hennessy, American Eagle and others.
In 2021, Mitrovic partnered up with producer Andy Baldwin to create Dark Bardo, a music production duo inspired by a mysterious package from an anonymous sender that contained a plastic sherrif's badge, a Cuban cigar, and a copy of Illusions: The Adventures of a Reluctant Messiah, a novel by Richard Bach.