Sustainable Engineering Forum (SEF) The SEF seeks collaborative work in programming and education objectives with other professional societies, both national and foreign. IfS Corporate Members IfS Member Companies access a wealth of expertise and technical information and benefit directly from tailored collaborative projects that help keep them on the cutting edge of sustainability developments. IfS Managing Board See the IfS leadership team. About IfS The Institute for Sustainability provides multidisciplinary scientific and technical rigor to sustainability discussions. Learn more. Join YCOSST Your YCOSST involvement and membership is crucial to the building of grassroots efforts that will influence curriculum and ultimately lead to the incorporation of sustainability concepts in all research.