This white paper examines the business case for environmental and sustainability (E&S) employee education and engagement. The "business case" is defined as both quantifiable measures of the business value for the sustainability program (e.g. money saved, energy use reduction, etc.) as well as less easily measurable assets such as reputation enhancement. Information in the white paper is primarily based on qualitative, anecdotal data and interviews, a review of company reports and Web sites as well as media articles, books and recent reports from Green Impact, ICF International (ICF) and MIT Sloan Management Review. The examples outlined in this white paper build on cases documented in "The Engaged Organization" report from Cisco, Clean Clothes, Hewlett-Packard (HP), Stonyfield and Walmart. Additional company case study examples from Baxter, Citigroup, Darden, eBay, IKEA, Intel, Lockheed Martin, Kimberly-Clark and Sodexo are also presented. Company Profiles is appended. (Contains 2 footnotes and 14 resources.) [Funding for this paper was provided by Kimberly-Clark.]