The #MeToo movement highlighted that sexual harassment continues to impede progress towards gender equity in institutions across society. In science and academia, professional associations are an often untapped—but potentially important—resource for addressing sexual harassment and gender equity. They mirror and potentially recreate power differentials in academic hierarchical institutions, however they also have the potential to ameliorate (gendered) inequalities. Professional associations set norms for professional behaviour, ethics, and research integrity for example, at conferences, in communications, and in selecting their members for awards and gatekeeping positions. Together with universities and funding agencies, professional associations can help to frame gender and sexual harassment as violations of ethical norms and research integrity in order to combat harassment and promote gender equity in the academy.