I need to find information regarding Chevron Corporation's organizational chart
Neither Chevron, nor our company databases, exactly provide a company organizational chart. The closest you can get is a list of senior management with titles, as well as the list of Board of Directors. This should allow you do develop a rough organizational chart yourself.
The main company information databases are listed on this page:
Search Hoover's or MarketLine Advantage for Chevron as a company name. Chevron also provides some information on its Web site: http://www.chevron.com/about/leadership/corporateofficers/