Sirko Siemssen – Biography
Last update: March 23, 2026Executive profile
Sirko Siemssen joined Marsh McLennan in 1999.
Sirko Siemssen is currentlyPartner and Global Head of Retail and Consumer Goods at Oliver Wyman - View - Oliver Wyman org chart
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- At Oliver Wyman, Sirko Siemssen has 278 colleagues including Ted Moynihan (CEO), Huw van Steenis (Vice Chairman of the Board)…
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- In the Consulting industry, Sirko Siemssen has 20,538 colleagues in 795 companies located in 42 countries. 11,770 executive movements have been recorded in the last 12 months. Learn more about Consulting.
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