george, Congratulations on getting the interview. I have no current tips since mine was quite a while back, but be sure to bring any and all documentation with you, brush up on FARs, learn as much as you can about the Company, be yourself, display a positive interest in the job, and have a sense of humor. I know there is a lot of stress involved, but if you weren't qualified they wouldn't waste time talking to you. Best of luck and good hunting.