Who says you can't teach an Old Snake new tricks? Konami is looking to do just that, as evidenced by a job recruitment page. The page went live on Friday and explains Konami is seeking people to help with "new developments" in the Metal Gearseries, specifically for home consoles and mobile devices (more Metal Gear Solid Touch?). The job posting also lists other titles that Konami is working on that aren't part of the Metal Gear series, such as Winning Eleven, Jikkyou Powerful Pro Baseball, and Bemani, as well as new online game content and pachislot machines.
Nothing else is explicitly mentioned, but if you want to try to make sense of the job ad (and can read Japanese), then by all means, click here.