Glad you found a suitable staff person.
Russians, because of the socialist system's provision of free education, are usually educated fairly well, at least compared with Americans. No one can be sure how the universities there compare with ours here. During the Soviet Union, because there was little else to do, probably, many people received bachelors and masters degrees. It was fairly common. I don't know about today, though.
The Russians seem particularly talented in the arenas of computers, technology and science. Not that I believe for one second in the stupid 'Russian hacking' circus stirred up over nothing to distract the public's attention.
Many are quite qualified, so your company has probably made a good choice.
[ Ha ha - maybe you can discuss True Orthodoxy with the new Sysadmin ?! That is, if he is Orthodox. Did you have a chance to ask him ? ]