Complex sentence: Prior to working for the government, she was an ESD pilot with childhood friend Dylan Dubrow-Hiller (whom she befriended in the original film), held the rank of lieutenant, and is a skilled aviator.
Split into simpler sentences: Prior to working for the government, she was an ESD pilot with childhood friend Dylan Dubrow-Hiller (whom she befriended in the original film). She held the rank of lieutenant at ESD, and is a skilled aviator.