I work full-time as an analytical chemist in a forensic toxicology laboratory and part-time as a research technician in a neurochemistry laboratory in the Midwest USA. I've been using Wikipedia for years now, but only recently (June '07) started contributing. I generally focus on contributing to articles within my interests which include pharmacology, drug metabolism, neuroscience, chemistry, biochemistry, theoretical mathematics, artificial intelligence.....and whatever else I get into the mood for.