Risto Siilasmaa height - How tall is Risto Siilasmaa?

In October 2018, Siilasmaa published a book about Nokia, Transforming Nokia: The Power of Paranoid Optimism to Lead Through Colossal Change. In it, he criticises predecessor chairman Jorma Ollila's leadership style and claimed they fell out.

Paranoid optimist, by Catherine Fredman and Risto Siilasmaa, 2018: In Transforming Nokia, Chairman of the Board Risto Siilasmaa offers his firsthand account of the company’s dramatic fall and astonishing turnaround. He reveals the reasons for its collapse and how other leaders can avoid the same fate. He shares the survival strategies and change-management methods he learned by leading people through crisis and steering the company through its wrenching reinvention. And he explains how the power of paranoid optimism and the precepts of what he calls “Entrepreneurial Leadership” enable leaders to build sustainable success.

After being appointed chairman of Nokia in mid-2012, he has led the company in one of the most successful corporate transformations ever. Through three transactions that he negotiated – the purchase of complete ownership of Nokia Siemens Networks, the sale of the handset business to Microsoft, and the acquisition of Alcatel-Lucent – Nokia has transformed from a bankruptcy candidate to a successful global technology leader. This is reflected in Nokia's value which has gone up fivefold over roughly two years. Even more revealingly, the enterprise value has grown from a low of only less than 1.5 billion euros soon after Siilasmaa started as chairman to well over 20 billion euros in early 2015. In a September 2018 interview with CNN in Switzerland, he described Nokia as an "experimenter."

Siilasmaa founded F-Secure in 1988. He left his role as CEO of the company on 6 November 2006.

Risto Kalevi Siilasmaa (born 17 April 1966 in Helsinki, Finland) is the chairman, founder and former CEO of F-Secure Corporation (formerly Data Fellows), an anti-virus and computer security software company based in Helsinki, Finland. He is also the biggest shareholder of F-Secure, owning around 40% of the company. A member of Nokia's board of directors since 2008, he has been the chairman from 2012, as well as interim CEO, after Stephen Elop from 3 September 2013 to 29 April 2014 when Rajeev Suri was appointed the official CEO.