Sometimes, but not always.
A person who designs / builds / configures / implements network technology
A person who is control of and has ultimate responsibility for a network
Now, it's not hard to see how those two jobs could be one in the same, but it's also just as likely that a network engineer would not have the ultimate say, even if they're brought in to consult or advise.
With that said, I find it highly unlikely that treating the two terms as synonymous will cause any real confusion here. For example, for the purposes of this site I consider myself a System Administrator when, in reality, I'm generally acting as an outside consultant.