A couple of months back i got an upgrade to my LinkedIn account that allows me to write essays there, which I occasionally use to spout management level gyaan. While it leads to fragmentation of my writing (there are already three blogs, including this one, and Mint), it helps create conversations on LinkedIn and in personal brand building.
So today I wrote a post on LinkedIn on the risk of overspecialization. The basic concept is that when you work at a large company you run the risk of specializing in something so narrow (which makes sense in the large company) that you are unable to transfer this skill to another job, and that leads to reduced job hunting opportunities.
Go ahead and read the whole post.