The online application process is fairly lengthy, and I suggest calling to follow up once you fill it all out. A personal contact there is invaluable, it seems. Keeping your name in front of them will help you find work. The interview process itself was fairly simple. You come in the office for filling out the paperwork. My experience was that they depended on your resume to provide a good fit, so if you are applying for a specific job, you should make your resume reflect key terms in the job description. Sometimes a specific company will request interviews, and these interviews will follow typical interview formats, in my experience. The interview and hiring process is as varied as the jobs they try to fill (and that is a huge variety).