TO QUALIFY APPLICANTS MUST SUBMIT AN APPLICATION THROUGH OEC'S ONLINE PORTAL AT. https://corpsnet.onondagaearthcorps.org/portal/OECApplicationStep1.aspx. ABOUT US. Onondaga Earth Corps and the Youth Conservation Corps Model. The Onondaga Earth Corps (OEC) is a youth development and conservation corps program focusing on community and environmental stewardship in the Greater Syracuse Metropolitan Area. OEC enrolls youth and young adults, ages 15 t...