Ralph Gillessen – Biography
Last update: March 11, 2026Executive profile
Ralph Gillessen joined Assystem in 2002.
Ralph Gillessen is currentlyChief Executive Officer at Silver Atena - View - Silver Atena org chart
Group Chief Operating Officer at Expleo - View - Expleo org chart
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Company Colleagues
- At Silver Atena, Ralph Gillessen has 26 colleagues including Josef Mitterhuber (COO), Thorsten Wolber (Finance)…
- At Expleo, Ralph Gillessen has 42 colleagues including Walter Cappilati (CEO), Odile Chaumont (HR)…
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- In the Engineering & Design industry, Ralph Gillessen has 17,866 colleagues in 878 companies located in 55 countries. 8,668 executive movements have been recorded in the last 12 months. Learn more about Engineering & Design.
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