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Chelsea Stoner was trained as a chemical engineer before moving into an investing career.

Battery Ventures has promoted Chelsea Stoner from principal to partner, VentureWire has learned, making her the first female partner in the history of the nearly 30-year-old firm.

 Stoner joined Battery in 2006 from Key Principal Partners, a private equity firm, and specializes in later stage investments and buyouts in software services and health-care IT.

Her portfolio companies include Glassdoor, Groupon and Marketo, whose chief executive told VentureWire this week that his company is in the early stages of preparing to go public. Most recently, she led a $20 million round in Avalara, which provides sales tax automation services over the Web.