Site-reliability engineers is the correct de-abbreviation. While data at Google is tightly protected, everything else at Google is fairly transparent. In part

Site-reliability engineers is the correct de-abbreviation. While data at Google is tightly protected, everything else at Google is fairly transparent. In particular, you can see who is using what resources. SREs, among other things, monitor and manage this resource usage. Large, abnormal usages ("Why is someone copying all this data off-site?") will be noticed, and some of the people who will notice won't take "because the NSA told us to" as an acceptable answer.