Complex sentence: Also in 1941, William McKell became the new ALP Premier, defeating the anti-ALP administration of Alexander Mair; and once in office, McKell appointed Cahill to the job of Secretary for Public Works.
Split into simpler sentences: Also in 1941, William McKell became the new ALP Premier, defeating the anti-ALP administration of Alexander Mair. Once in office, McKell appointed Cahill to the job of Secretary for Public Works.