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Constellis Holdings announces appointment of Dan Gelston as CEO

February 9, 2026SSN Staff

HERNDON, Va.—Constellis Holdings, LLC (Constellis), a global provider of integrated security, training, and risk management solutions, has announced the appointment of Daniel Gelston as chief executive officer, effective immediately. Outgoing CEO Terry Ryan will transition to the role of executive vice chairman, reporting to the board of directors. This planned leadership change ensures business continuity while accelerating the organization's next phase of technology-led growth. "After...

Board of Directors, C3 AI, CAE USA, Cobham, Constellis, Daniel Gelston, L3Harris Technologies, Michael Lundin, Smiths Detection, Terry Ryan