Links for careers in the Geosciences

• American Association of Petroleum Geologists – careers page
• American Geological Institute careers homepage
• American Geophysical Union page of careers links
• Associated Western Universities, links to fellowships and opportunities at schools in the western U.S.
• Environmental Career Opportunities (ECO)
• The Environmental Careers Organization
• Environmental Jobs and Careers homepage
• A short essay about careers in geology
• Environmental Careers E-mailing list
• Geological Society of America careers information order form
• Houston Geological Society -- updated job listings, most of them in the petroleum industry. See what credentials they're looking for! 
• Newsgroups which can be searched for combinations of key words like "jobs" plus "environmental" or "geology"
• National Academy of Sciences careers homepage
• Global Environmental Institute (GEI)
• Science's Next Wave, an electronic network for the next generation of scientists. Good information and articles on careers in natural sciences. 
• USGS - United States Geological Survey homepage

Internships and REUs

• National Science Foundation Research Experiences for Undergraduates
• NSF REUs - Earth Sciences

Organizations

• AAPG - American Association of Petrolum Geologist
• AGI – American Geological Institute
• AGU - American Geophysical Union
• GSA – Geological Society of America
• MSA – Mineralogical Society of America
• NAGT – National Association of Geoscience Teachers
• SEPM – Society of Sedimentary Geology

Geoscience Departments 

Geoscience Departments – links for graduate schools, faculty, opportunities, etc.