In this SIG, we propose a gathering of the HCI and Sustainability SIGCHI community to strategise future initiatives. This gathering is open to all attendees of CHI’18 and aims to foster an inclusive dialogue about the myriad challenges stemming from the intertwined issues of digital technology design and use with environmental and social justice. As a sustainability-focused SIGCHI community, it is our duty to remain committed to promoting environmental and social justice—a commitment that is particularly timely given the number of digitally mediated global events challenging those entwined notions of justice. In the midst of our rapidly changing and globalised context, this SIG offers space for CHI’18 attendees to strategise about the goals, directions, and initiatives of HCI and Sustainability community. We aim to develop draft outcomes as a seed for ongoing collaborative discussion and development of the HCI and Sustainability community for the next 2-5 years.