The "chosen" one

I have just been informed that I have been appointed chair of one of our college's working committees. I'm by no means the oldest among the members of the committee. It just so happens that I have been appointed by our director to serve as representative of the institute in the committee all these years while the heads of the other departments have chosen different representatives nearly every year. Peg it down to my so-called experience, in other words. Besides, there are so few of us faculty members in our institute that I suppose our director hasn't had much of a choice. In fact most of us here are doing double duty by serving as members in various committees both within and outside our institute.