Kazi Awal/InsiderSandra Noonan is Just Salad's chief sustainability officer.Just Salad Many companies have hired chief sustainability officers, or CSOs, in recent years. Their job is to drive projects that help organizations meet their sustainability goals. Here's a look at how some top CSOs are making strides in their organizations. This article is part of the "Financing a Sustainable Future" series exploring how companies take steps toward funding and setting their own sustainable goals. As companies commit to being more environmentally conscious and launch initiatives to reduce greenhouse gas emissions, waste, and water use, they often need someone to drive these programs.