But if someone really wants to do this, IMTHO - the future will be Free+OSS.
The present is Windows and Unix closed-source infrastructure (including closed custom apps with available source).

The move is inevitable; Free+OSS isn't hobbled by the need to reinvent the wheel over and over again.

If you(?) are going to get certified for infrastructure work, I'd get certs in both Windows and Linux environments. MCSE & RHCE. That way, you fit into today's environments (I admit, into true Unix obliquely), fit into the upcoming need to migrate, and into the future.

If you want to scratch a programming itch, I'd suggest a multi-platform language(s) - C/C++ or Java, perhaps. PHP is cool, too. I dunno what certs would help you there.. Courses from a college might impress HR long enough to get to folk that can recognize ability.

Take this advice for what it's worth, coming from someone struggling to stay alive. Of course, you know I'm famous for not following my own advice... *grin*