Complex sentence: Prior to the blog, Webber/Smith had graduated from Harvard College and Harvard Business School and had 20 years of experience in the financial services industrywith Goldman Sachs, McKinsey & Co., and Sumitomo Bank.
Split into simpler sentences: Prior to the blog, Webber/Smith had graduated from Harvard College and Harvard Business School and had close to 20 years of experience in the financial services industry. She had worked for Goldman Sachs, McKinsey & Co., and Sumitomo Bank.