The hotel worked with the Professional Association of Diving Instructors (PADI) to find the performers, 90% of whom were already diving instructors.
ホテルはPADI(Professional Association of Diving Instructors)と協力して出演者を探したが、その9割はすでにダイビングのインストラ クターだった。
The hotel worked with the Professional Association of Diving Instructors (PADI)
がでかい主語とおもったら、to find
の不定詞が変だ。
get together / combine / collaborate
Work with=一緒に働く、要するに協力し合う