Complex sentence: He is also an inept manager at his father's real estate and development business, Dunbar Industies, and if left to his own devices and forced to fend for himself without assistance (e.g., from Timmy), he would completely destroy his office in minutes.
Split into simpler sentences: He is also an inept manager at his father's real estate and development business, Dunbar Industries. If left to his own devices and forced to fend for himself without assistance (e.g., from Timmy) he would completely destroy his office in minutes.