On Friday, Oct. 12th, 2018, the second joint networking event between the Columbia and Mount Sinai p30 EHS Core Centers was held at the Columbia University Irving Medical Center campus. The event was well attended by close to 60 researchers. The agenda centered around smaller discussion groups, focusing on four important topics that are part of the NIEHS 2018-2023 Strategic Plan. The groups included: The Microbiome, Co-Exposures, The Exposome, and Outreach, Communications and Engagement. The participants in each group brainstormed for about an hour, focusing on questions such as research gaps, the strengths of each Center/institution, datasets that are available, data analysis tools, and possible funding mechanisms. Everyone then reconvened for a quick summary by one member of each group, followed by a reception and social hour.