Sylvia Tulloch has experience as an angel investor in several clean technology startups. She discusses her investments in Dyesol, a company commercializing dye-sensitized solar cell technology that had an IPO and peaked at a share price of $2.35, Perimeter Security Industries developing fiber optic sensor technology for security applications, and Uniflow Power developing next generation steam engines. She looks for companies developing advanced technology, with intellectual property and a global market focus when evaluating potential investments and enjoying being involved in startups working on technologies that can make a positive impact.