Mark Hyatt, executive director of the Colorado Charter School Institute for the last two years, will leave to become chief operating officer of the Character Education Partnership in Washington, D.C.
Hyatt oversaw a 50 percent increase in enrollment among the Charter School Institute's 22 schools, which now have 10,500 students.
"He launched a strategic plan that will ensure the institute continues to enhance its reputation as a model authorizer and leader in school reform," said CSI board chairman Wayne Eckerling in a statement.
Ethan Hemming, who has been deputy executive director since April, will become interim executive director. He previously worked for 13 years in the Denver Public Schools, with part of that time spent overseeing 28 charter and six innovation schools.
In his new role, Hyatt joins a national, non-profit that provides curriculum resources to promote character education.