Kate Castle has joined IDG Ventures Boston as director of marketing. She previouslyserved in a similar role with Battery Ventures.Polaris Venture Partners has promoted Jason Trevisan from associate to principal. He joined the firm in June 2003, after having served as director of analytics andclient services with aQuantive (Nasdaq: AQNT).Daniel Castro has joined GSC Partners as a managing director. He spent the past 13 years heading up Merrill Lynch?s structured finance research group.Rodney Cohen has joined private equity firm Behrman Capital as a partner. He previously served as a partner with Lindsay Goldberg & Bessemer.Antonio Miranda and Michael Kaplan have joined Greenwich, Conn.-based private equityfirm Littlejohn & Co. as senior associates. Miranda recently earned his MBAfrom Stanford University and previously was an associate with Clayton, Dubilier& Rice. Kaplan comes to Littlejohn from Ripplewood Holdings.