Ecoliteracy is the pedagogical grouping of environmental science, ecology and sustainability studies. This paper is a policy analysis of how principal training and evaluation standards may support a principal's building-level efforts to establish and sustain an ecoliteracy mission and curriculum in US public K-12 schools. A comparative case study of leadership standards in Texas and Michigan was conducted to support the argument that school administrator training and evaluation standards in both states can lend formal, codified support to a sufficiently determined school leader's efforts to center the school's mission on ecoliteracy. The limitations of this support are also discussed.