Career-wise, attending this training program has been very beneficial for me.

career-wise 是由名词 career（职业）加上后缀 -wise 构成的复合词。-wise 作为后缀可以表示"在...方面"或"关于..."的意思。 career-wise 的意思是"在职业发展方面"或"从职业角度来看"。