Following is a list of several links that lead to databases and search engines designed specifically for internships and seasonal jobs.  Most have a variety of internships, and others are centered around those that are environmentally based.

Experimental Programs in Chemistry
EPiC is founded by the American Chemical Society and is a search engine for a variety of experiences including co-ops, fellowships, internships, part-time work, and summer jobs. It is not only for chemistry majors, but includes many areas of science. Students can search by region and area of interest as well as by which experience they would like to do. 

The University of Career Services at The University of Virginia
UCS receives numerous independent notices of internships from organizations throughout the country. These are listed and linked to their page. There is also a variety of information about what internships really are, where to look, and how to apply.

The Washington Intern Foundation
The Washington Intern Foundation is a non-profit organization dedicated to assisting individuals locate and successfully perform internships in the Washington, DC area and on Capitol Hill. They also list many currently available internships on their web site both on "the Hill" and off. In addition, students may post their resumes on the web site as well.

Rising Star Internships
Rising Star has listings of internships in alphabetical order by positions varying in Accounting to Zoology. Employers are given the opportunity to post their job offerings and students may, in response, post their resumes.

E Jobs
E Jobs is a great place to look for information on internships as well as permanent positions in environment related fields. Environmental Career Planning for College Students is an excellent page where there is abundant information available. If you are interested in an environmental science major or unsure in what direction you are heading, check out this page to gain helpful insights.

Ubiquity Environmental Careers Page
The Ubiquity Environmental Career Page was founded for people who are interested in a career that is dedicated to the environment. Find advice in picking an environmental career that is right for you, find environmental jobs, learn how to apply for them, and more! 

Job Search
Cyber-Sierra's Natural Resources Job Search has job and internship postings as well as many links. There are many categories under Natural Resources including environment, water, summer, GIS and forestry.

Iowa State's Internship Page
Iowa State's Internship Page through their biology department lists a variety of positions for internships through universities, zoos, and clinics. Although specific environmental or conservation fields are not mentioned, many of the listings allow one to do research projects of their own choosing.

The Environmental Careers Organization
The Environmental Careers Organization (ECO) is a national, non-profit, educational organization. ECO's mission is to protect and enhance the environment through the development of diverse leaders, the promotion of careers, and the inspiration of individual action. This is accomplished through internships, career advice, career products, and research and consulting. ECO provides environmental career information and services to over 50,000 people each year. There are also a number of paid internships listed by region.

NRES
The Department of Natural Resources and Environmental Sciences Internship Program assists students with securing internship positions in natural resources and environmental sciences. The mission of the department is to establish and implement research and educational programs that enhance environmental stewardship in the management and use of natural, agricultural, and urban systems in a socially responsible manner. They give links to employment and internship listings.

Review.com
Offering a wide variety of information on college, grad school, med school, business school, law school, and careers in general, Review.com, a division of the Princeton Review, is worth a few minutes of your time. In addition, they have a great internship search engine that allows you to search by region, field of study, and weekly compensation. There database is large and lists many opportunities as well as details about each. Look under their 'career' link from their main page to browse information on internships.

CareerPlanit and Jobweb
CareerPlanit is a web site devoted to helping college freshmen, sophomores, and juniors explore careers and learn about employers who offer internship, cooperative education, and other experiential education opportunities. JobWeb is a job search engine for graduates.