Executive Assistant, Signature School. Signature School, a 9-12 public charter high school named the # 1 Best High School in Indiana and the #2 Best Charter nationwide by US News & World Report, and #1 in the country on the Jay Mathews (of the Washington Post) Challenge Index list is searching for an Executive Assistant to join the school’s administrative team effective immediately. The person in this position is pivotal in setting the tone for s...