This site is recommended by several advertising associations and bills itself as the "largest collection of advertising jobs on earth". Free registration is required.

The Advertising Educational Foundation is the advertising industry's provider and distributor of educational content and its goal is to enrich the understanding of advertising and its role in culture, society and the economy. A great deal of career information is available here including advice, job descriptions, training opportunities as well as multiple guides and presentations.

MediaWeek and Adweerk are major major trade journals in the advertising and media industries. Job Listings as well as a database for searching particular types of jobs (including internships). Some career advice is available on this site.

The 4A's is the professional and trade association for those who work in advertising agencies.
The Career page contains links to both a job bank and a listing of job descriptions. Useful for both the beginner and seasoned ad professional.

This page of the 4A's website is devoted to career development. There are several links that connect users to a job bank, training programs, and scholarship opportunities.

This is the main trade association of advertisers, i.e., client-side corporations and organizations.

The Greenbook is a (free) major source of directory information about marketing research firms. Their job listings are extensive and up-to-date.

Listings of job opportunities in digital advertising compiled by the Interactive Advertising Bureau in conjunction with a publisher of trade newsletters.

Mashable is a large independent website covering trends in social media, technology, marketing and branding. Check out the "Job Search Series" for articles, videos and presentations on using social media and the Web to find employment.

Mainly design and graphics postings geared toward the creative side, however, the site also lists some account manager/exec advertising and brand positions as well. One can search by category, keyword and geography.

Very comprehensive, helpful and well-organized site for information on career opportunities and descriptions of the field as well as listings of job opportunities.

Indeed describes itself as the #1 job site worldwide, with over 60 million unique visitors and 1 billion job searches per month. The database is searchable with a useful advanced search option modeled after Google's advanced search option.

ADText is an online interdisciplinary curriculum, published by the ANA Educational Foundation and open to all. It strengthens the AEF mission of enriching the understanding of advertising and its role in society.

Much like "TED Talks" except for advertising and marketing career information. Links to webcasts and online seminars on career management.