Complex sentence: At the age of sixteen, he joined the AFL in order to further his life; after finishing high school in 1978 through a programme at the Barclay Training Center, he received an assignment to the AFL's records department.
Split into simpler sentences: At the age of sixteen, he joined the AFL in order to further his life. After finishing high school in 1978 through a programme at the Barclay Training Center, he received an assignment to the AFL's records department.