GSD events:
http://www.gsd.harvard.edu/events/

Non-GSD events (Workshops/seminars/conferences):

- Harvard Business School Events
http://www.hbs.edu/news/news.html
http://www.alumni.hbs.edu/news_events/news_events.html

- Harvard Graduate Council Events
http://hgc.harvard.edu/events.htm

- MIT Center for Real-Estate
http://web.mit.edu/cre/events/index.html
http://web.mit.edu/cre/alumni/index.html#events

- MIT School of Architecture and Urban Planning
http://events.mit.edu/
http://architecture.mit.edu/events/2262/m0.html
http://architecture.mit.edu/calendar/05_bt.pdf

- Harvard RED Club
http://projects.gsd.harvard.edu/redclub/events.htm

- Project Management Institute (PMI)
http://pmi.org/info/default.asp

- American Institute of Architects
http://aia.org/events

- The Associated General Contractors of America
http://www.agc.org/page.ww?section=Meetings+%26+Events&name=Calendar+of+Events

- Design Build Institute of America
http://www.dbia.org/fr_calendar.html

- Engineering News Record
http://enr.construction.com/resources/industCalendar/IndustryCalendar.asp

- Construction Management Association of America
http://cmaanet.org/conference.php