Green Career Mixer and Job Fair The Green Career Mixer is a job fair designed to connect environmentally-focused employers or those with major green initiatives to sustainably-minded students at the University of Arizona. We welcome all companies and organizations that have immediate full-time and internship hiring needs in the environmental and sustainability fields. This is a mixer format with the focus on personal interaction and small group conversation. Registration fees vary. This mixer is sponsored by University of Arizona Students for Sustainability and University of Arizona Student Engagement and Career Development