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James C. Foster is the CEO of eSentire, a leading cybersecurity firm specializing in Managed Detection and Response services. A seasoned cybersecurity executive, Foster has driven five security company exits and delivered tremendous growth at scale as both a private and public company leader. Under his leadership, eSentire continues to drive market acceleration and innovation in cybersecurity.
Who is the CEO of eSentire?
James C. Foster is a seasoned cybersecurity CEO who has driven five security company exits and delivered tremendous growth at scale as both a private and public company leader. Currently serving as the CEO of eSentire, Foster is also the Founder of ZeroFox, a recognized leader in external cybersecurity, where he served as chairman and CEO from January 2013 to May 2024 and now serves on the board of directors.
Foster's strategic vision and leadership have been recognized with numerous accolades, including the EY Entrepreneur of the Year Mid-Atlantic winner in 2020, CEO of the Year by The Daily Record, and recognition by the Baltimore Sun and SmartCEO. His contributions to cybersecurity are extensive, with over one dozen published books, multiple patents, and frequent keynote speaking engagements at high-profile events such as Capitol Hill briefings, RSA, Black Hat, and appearances on SquawkBox, Bloomberg, FOX, and MSNBC.
Work History
Throughout his career, James C. Foster has held various significant positions in the cybersecurity sector. Here is a list of the places he has worked previously:
- eSentire - CEO, February 2026 – Present
- Censinet - Chairman of the Board, August 2025 – Present
- AfterFuse - "Fuser", April 2025 – Present
- Department of Defense - Specialist, January 1997 – January 1999
In addition to his extensive work history, Foster holds education from The Wharton School, which has supported his ability to lead and innovate across the cybersecurity sector.
Education History
James C. Foster's educational background includes studies at The Wharton School, one of the world's most prestigious business institutions. This foundation has complemented his deep technical expertise in cybersecurity and contributed to his ability to lead high-growth organizations, execute strategic acquisitions, and drive innovation across both private and public companies.
When did James C. Foster join eSentire?
James C. Foster assumed the role of CEO at eSentire in February 2026, bringing with him a wealth of experience built across decades of cybersecurity leadership. His track record includes driving five security company exits, founding ZeroFox, and scaling organizations to multi-hundred-million-dollar revenue milestones, positioning eSentire for continued growth and innovation in Managed Detection and Response services.
