Complex sentence: Ms. Stonesifer's is a public supporter of initiatives on behalf of women and minorities and has been inspiration to other executives, with many of the managers formerly reporting to Ms. Stonesifer at Microsoft, becoming successful on their own, owing in part, to her guidance.
Split into simpler sentences: Ms. Stonesifer's is a public supporter of initiatives on behalf of women and minorities. She has inspired other executives, with many of the managers formerly reporting to Ms. Stonesifer at Microsoft becoming successful in part through her guidance.