Complex sentence: Women's higher educational attainment is demonstrated by the fact that many of the women who are employed work in the professional sector still, there are fewer women in the workforce and they earn less than their male counterparts.
Split into simpler sentences: Women's higher educational attainment is demonstrated by the fact that many of the women who are employed work in the professional sector. Still, there are fewer women in the workforce and they earn less than their male counterparts.