Kekst CNC has appointed Lyndsey Estin as Co-Chief Executive Officer.Estin will lead the firm’s US operations and work alongside Richard Campbell, who oversees non-US global operations.She succeeds Jeremy Fielding, who is moving to an in-house role at a public company.Estin has been with Kekst CNC for over two decades, during which she has held multiple senior leadership roles. Her experience includes work across mergers and acquisitions, shareholder activism and financial communications. She also founded and leads the firm’s US cybersecurity practice and contributes to its AI advisory work, including initiatives linked to parent company Publicis Groupe.Commenting on the appointment, Arthur Sadoun highlighted Estin’s experience across financial communications, crisis counsel, AI and cybersecurity, noting her role in advising organisations navigating evolving risks and technological change.Estin said the firm remains focused on supporting clients amid ongoing global shifts driven by technology and emerging risks.