Risto Siilasmaa is the Chairman of the Board of Directors of Nokia Corporation since 2012 and was interim CEO in 2013 and 2014. As Chairman he led Nokia through its transformation from an ailing devices company to a successful network infrastructure player through the divestiture of the Nokia device business to Microsoft and the acquisition of Nokia Siemens Networks and the acquisition of Alcatel-Lucent. He is also the author of TRANSFORMING NOKIA: The Power of Paranoid Optimism to Lead Through Colossal Change as well as the founder and chairman of F-Secure Corporation, a Finnish cybersecurity company.