Source : Free On-Line Dictionary of Computing

system mangler
     
         A humorous synonym for "{system manager}", possibly
        from the fact that one major {IBM} {operating system} had a
        {root} account called SYSMANGR.  The term refers specifically
        to a systems programmer in charge of administration, software
        maintenance, and updates at some site.  Unlike {admin}, this
        term emphasises the technical end of the skills involved.
     
        [{Jargon File}]
     
        (1995-11-10)