I am a software engineer with extensive experience in the following:

     Unix:
          - Programming in C (X11 Windows, XView, Xt/Motif, system,
            RPC/TCP-IP/Sockets).

          - System administration (SunOS 4.1.X/BSD plus a bit of
            SVR4, inc NIS).

          - Emacs elisp utilities.

     DOS:
          - DOS C programming, mouse/display driver libraries, plus
            general utilities.

          - Quite a bit of experience of configuring MS-Windows 3.1
            and sorting out/recovering from problems.

     Good alround experience in software engineering.

     That's all I can think of at the moment.