JCI Croatia | Dobrodošli! Junior Chamber International (JCI) Croatia is a part of a worldwide membership-based nonprofit organization of young active citizens ages 18 to 40 who are dedicated to creating positive change in their communities. JCI Mission is to provide development opportunities that empower young people to create positive change. Through projects in 5,000 communities across more than 120 countries, members seek targeted solutions to local problems, creating a global impact.