This is a company with really rigid and restrictive rules and procedures that micromanages the way all their employees do each and every task. This makes it hard to do your job there as a technician, because the whole operations department (shop) is badly understaffed and you often have to wait for other people who might be on break or in the bathroom before you can proceed on a job, and just generally spend a lot of time on procedures that accomplish nothing. Techs are paid by the hour, not flat rate, so this might not seem like a problem--but techs are judged by something called an "efficiency rating" that is based on speed. It's hard to be efficient if you're one of 3 techs in a big shop that was meant for thirty guys--but don't, for instance, install a windshield wiper outside in the lot, because that can get you fired. In addition, Carmax supplies your tools, but you won't necessarily have the specialized tools you need for a job. If this happens, send it to the dealer, don't try to make do because that hurts your efficiency and especially don't bring your specialty tools from home--that can also get you fired. Also, they give a $1,000 reward to any employee who reports another employee for breaking a policy that gets them fired, so don't go above and beyond and make your coworkers look bad in comparison. Always remember that any rule-bending can get you fired, even if you do it to make the shop work better and no harm could ever come of it--the rules are always more important than the employees. Employees are interchangeable here.
When this store first opened, the hiring managers (the store managers) lied to the technicians they hired. (I believe they were lied to by corporate, and passed on the lies without knowing it--they are not devious people.) They base your initial pay grade on the number of ASE certifications you have, but they also told the technicians (some of whom had already taken multiple tests whose results were pending) that they would get promoted as soon as they got more certifications. This was a lie, and it caused pretty bad morale problems with the techs because they ended up with some of the best guys having the most certifications making the least pay. (Some of them were recruited away from better-paying jobs, as well.) When the store managers tried to promote them, corporate shot them down, and they lost good employees because of it.