The MIT Career Development Center serves graduate students as well as undergraduates. See their web site for personal or online resources.
MentorNet is a dynamic mentoring program that matches experienced professionals from industry and academia with graduate students in engineering and science (especially women and others underrepresented in these fields).
MIT's Association of Alumni and Alumnae provides a current job listing and support for alumni with professional networking and career change through the Institute Career Assistance Network (ICAN).
The Academics, Research, and Careers (ARC) Committee of the Graduate Student Council pursues academic and career-related advocacy issues. Visit their web site for current information.
The Path of Professorship workshop for graduate and post-doctoral women is an opportunity to learn more about purusing an academic career.