THE CITIZEN SCIENCE ASSOCIATION WILL HOLD ITS THIRD BIENNIAL CONFERENCE, CITSCI2019. THIS PROJECT WILL HELP THE FIELD OF CITIZEN SCIENCE CONTINUE TO GROW AND MATURE TO HELP ACHIEVE SCIENTIFIC, ENVIRONMENTAL, AND SOCIAL OUTCOMES. THE CONFERENCE WILL HELP TRANSFORM SCIENTIFIC RESEARCH AND LEARNING, BROADEN PARTICIPATION IN SCIENCE AND ADDRESS KEY SCIENTIFIC CHALLENGES.