Complex sentence: Soon after completing high school, Yaniv joined the Israeli army, as part of his military service, as the soloist of the National Air Force Orchestra, a big band orchestra consisting of top musicians from across the country.
Split into simpler sentences: Soon after completing high school, Yaniv joined the Israeli army as part of his military service, as the soloist of the National Air Force Orchestra. It was a big band orchestra consisting of top musicians from across the country.