cut one's teeth

「最初の経験を積む」。teeth関係はイマイチなぞな言い回しが多いですが、その一つ。こちらのサイトによれば、「赤ちゃんの最初の歯が生えてくる時は歯ぐきを突き破って出てくるので、そこからの連想」ということですが。ホントかな？

More names for the GreenBeat marquee: Gee, Wagner, and Wong on VentureBeat

Robert Gee — President of Gee Strategies. One of the earliest advocates for the development of a Smart Grid, Gee cut his teeth in the energy market on the Public Utility Commission of Texas in the early 1990s, during which time he also chaired the Committee on Electricity for the National Association of Regulatory Utility Commissioners.