You should have no problem getting an entry-level IS auditor job, especially in a large metro area like Washington, DC. Internal auditing is a hot field lately due the requirements of the Sarbanes-Oxley act that requires stricter governance within companies and more monitoring of internal controls.
A couple of suggestions for your job search. Go to the meetings of the local chapter of the Institute of Internal Auditors and the Information Systems Audit and Control Association. You can find your local chapter at the http://www.theiia.org and http://www.isaca.org websites. The local chapter will also have some job postings on their website. If you're young, don't mind a lot of travel and long hours, you might consider a consulting/auditing firm. The Big 4 accounting firms (KPGM, Ernst & Young, Price-Waterhouse and Delloite) have a lot of openings for IT auditors. Also, the smaller ones like Jefferson-Wells, Grant-Thornton and other small local ones usually have job openings. You can always hook up with a recruiter.
By the way... don't advertise yourself as a CISA. You can only do that if you are actually certified. Studying for the exam or even passing the exam does not make you a CISA. Besides passing the exam, you'll need at least two years of IS auditing experience before you can become certified.