They call and ask you to come in for an interview, then you get there and fill out an application and your I9 and tax information to do your taxes. Then in the interview they find out your skills and ask what pay you are looking for. Then if they find something they think you like they call you and if you say yes, they submit your resume to the company and if the company likes your resume they set up an interview, then if you and the employer like eachother they set up a start date.

After they sent you to an interview with client. They would call you to confirm your new job, your pay rate, and the start date. Also ask you to agree that you won't interview with other companies since they have secure the position. Once you go to their office and sign the last page of many documents, they will start telling you the truth that there is no such job and they want to keep your info for the possibility position in the future.