Sustainability is a hot topic these days. Demand for professionals and scholars who are knowledgeable about sustainability topics is growing exponentially. As with any nascent multidisciplinary subject area, sustainability students, scholars and professionals cope with the challenging imbalance of disorganized information abundance, coupled with knowledge scarcity. Questions far outweigh solutions and the pursuit of new knowledge abounds. For entrepreneurial librarians, environmentally conscious or otherwise, this is the perfect storm. Adept with much-needed research and organizational skills and a pre-existing ethic of collaboration and transparency, librarians are needed in this space. Motivated by their own personal passions and the needs of their patrons and institutions, entrepreneurial librarians demonstrate great leadership by carving new and essential niches for themselves in the emergent areas of scholarship and practice that embody sustainability.