Infrastructure-as-a-service firm Dyn said Thursday it has hired Timothy O'Toole, formerly the chief financial officer of Rapid7, as its new CFO.<br /><br />O’Toole had been CFO of the Boston-based security software firm from late 2008 until January of this year.<br /><br />The hiring comes after Manchester, N.H.-based Dyn reported closing more than $15 million in bookings and hiring 41 employees during the third quarter of the year. The revenue bookings were the largest for a quarter in the company's history, and were up 18 percent from the second quarter of the year, the firm said.<br /><br />Prior to Rapid7, O’Toole was the CFO of Burlington, Mass.-based Mzinga, and before that was VP of finance at BladeLogic, including during the firm's IPO in 2007.<br /><br />The addition joins other recent hires at Dyn including Matt Engel — a partner at Prism VentureWorks in Needham — who was hired as VP of business development.<br /><br />Dyn offers managed DNS and email delivery services and reports having more than 4 million enterprise, small business and personal customers. Clients include Twitter, Zappos, Jive Software, DataXu and CNBC.<br /><br />The company reported seeing $30.2 million in revenue in 2012, up from $6.4 million in 2009.<br /><br />Founded in 2001 as a spinoff from WPI, Dyn received its first outside funding in October 2012, a $38 million round led by North Bridge Venture Partners of Waltham. The company says it has more than 250 employees.<br /><br />Dyn's board includes well-known entrepreneur and angel investor Jason Calacanis, who joined in connection with the funding round.