I partially agree, but not only we are looking for experts of that thing, we are also looking for security experts, and security knowledge is very much meta-knowledge. A software developer might not care at all about - say - how the CI/CD works, because all they care is that the thing builds the code. A security expert generally has a broader scope, and their job is not functional, which means their job is exactly understanding the thing to be able to model the risks around it. So they might not care of all the tools used in that CI/CD or the exact details of the steps, but they should understand the execution flow, the way third party dependencies are pulled, verified, consumed, the authorization model etc.

There is no such thing of security professional who doesn’t understand - at least from an academic point of view - the overall setup of a thing they worked with.

If I take the image attestation example I made in the post, I consider the “inner workings” to be the cryptographic details, such as ciphers and their working mechanisms, or the exact details of the way that attestation can be verified offline, or what exactly is computed and how. I am OK with someone not knowing this. But not understanding the whole flow? Well, without this what’s left? Copying the 3 lines of code that do something from the Github documentation? Any software engineer can very much do that, what is your contribution as a security specialist?

……people lie on CVs and cover letters. If your ad has buzzwords and technology X, Y, and Z

Totally agree. It is very likely, although the more people I interview, the more I think that they are not lying from their perspective. It’s that people can legitimately make a career today by stitching together stuff with scotch tape, spending years by just by doing that and effectively have little to show for those years. But from their perspective, they might be experienced in that stuff, maybe?