Complex sentence: At the recommendation of Crusher, she was promoted to Lieutenant junior grade in 2370 and became a senior sickbay staffmember as Head Nurse, and would report to the command staff of the vessel in Crusher's absence.
Split into simpler sentences: At the recommendation of Crusher, she was promoted to Lieutenant junior grade in 2370 and became a senior sickbay staffmember as Head Nurse. She would report to the command staff of the vessel in Crusher's absence.