Seattle-based DocuSign, a developer of software-as-a-service electronic signature products, said today that it has named Mike Dinsdale as the firm's new Chief Financial Officer. Dinsdale joins the company from Lithium, where he was also CFO. Dinsdale also has served at vVlocity11, where he helped in the firm's acquisition by Agilent Technologies. DocuSign said it's seen around 300 percent growth in paid transaction in 2009, and now has over 4 million users and 78 million signature events captured to date. The firm is venture backed by Frazier Technology Ventures, Ignition Partners, Sigma Partners, and WestRiver Capital.