As was already mentioned. Trustness is the key. You need to be a trusted partner for such sensitive type of work. Wrong people with root access to core infrast

As was already mentioned. Trustness is the key. You need to be a trusted partner for such sensitive type of work. Wrong people with root access to core infrastructure can make much more damage and cost more than problem which isn't solved at all. There is also no space for learning on-the-fly. You have to know what you are doing, and how to perform certain steps correctly (t-shoot, recovery, migration). From my experience, almost all my contracts (> 90%) came from word-of-mouth. Almost all online and printed advertisements, online profiles were waste of my time and resources. Also, if friend of mine recommend me to someone else, I can believe that I will get paid (or there is only low risk). In case of blind-contract via internet, there is still a bigger risk that you will not get paid. I am not sure if I can (and want) trust published ratings on such web-pages.