At SANS, we are thankful to have an instructor corps considered to be the best in the world. Not only do they meet SANS stringent requirements for excellence, they are all real-world practitioners. What you learn in class will be up-to-date and relevant to your jobs.
Disclaimer: SANS will make every effort to ensure that the instructor scheduled to teach and advertised for an event will be the instructor at the event. However, through the years, we have run into cases of illness, death in the family and failures of the transportation system that are beyond anyone's control.
When we cannot supply the advertised instructor, we go through a best effort process to supply an alternate based on geography (proximity to the event) and seniority of the instructor. In rare cases of emergency, we reserve the right to supply a SANS certified instructor or higher competent in that field of study to present the course materials.
Please keep in mind that all certified instructors go through a lengthy and rigorous preparation process and in some cases have even greater domain experience than the advertised instructor. We thank you for understanding.