Carl Stjernfeldt manages Castile’s investment in Funambol, where he serves on the board.

Mr. Stjernfeldt focuses on communications technologies and services, advanced mobility and on next generation video delivery. He was previously a partner at Battery Ventures, and during his time with Castile and Battery has served on the boards of Agito Networks (acquired by ShoreTel), Arbor Networks (acquired by Tektronix), BNI Video (acquired by Cisco), Broadbus Technologies (acquired by Motorola), Cedar Point Communications (acquired by Genband) and Tejas Networks, and was a board observer of Optium (NASDAQ: OPTM, acquired by Finisar).   

Prior to Battery Ventures, Mr. Stjernfeldt was a client partner and project manager for Cambridge Technology Partners, delivering large mission-critical system implementations for Fortune 100 clients.  Mr. Stjernfeldt started his career as an engineer at Summa Four, developing  telecommunications solutions for domestic and international service providers, later rising to engineering management before starting an application development department.

Mr. Stjernfeldt holds a dual MS in Electrical Engineering from the Royal Institute of Technology (KTH) in Stockholm and Northeastern University in Boston, and an MBA from the Massachusetts Institute of Technology's Sloan School of Management.

Mr. Stjernfeldt is active at MIT serving as a Catalyst for the Deshpande Center, judging MIT's 100K competition, and teaching an entrepreneurial finance class at the Sloan School.  He is also a Charter Member with TiE and serves on the University of Michigan's Technology Transfer National Advisory Board.  Mr. Stjernfeldt is the Treasurer of the New England Venture Capital Association and is a board member of the Massachusetts Technology Leadership Council, where he also serves as co-chair of the Mobile Cluster.