![]() |
| Lyndsey Estin |
Kekst CNC has named Lyndsey Estin co-CEO and head of its US operation, succeeding Jeremy Fielding.
She will work closely with London-based co-CEO Richard Campbell, who leads the firm’s non-US business.
Estin has more than two decades of experience with Kekst CNC, handling M&A, shareholder activism, crisis and complex financial communications matters.
She founded and leads the cybersecurity practice and plays a key role in AI communications advisory work, which includes collaboration with Kekst CNC’s parent company, Publicis Groupe.
Arthur Sadoun, Publicis CEO, said Estin has established herself as a leader at the forefront of AI and cybersecurity. “She has been early in recognizing how emerging technologies reshape risk, reputation, and communications, guiding industry leaders as they define their narratives amid rapid internal and external transformation,” he added.
Fielding, a 27-year veteran of Kekst CNC, praised Estin for providing clients with superior judgment and for her ability to anticipate what lies ahead.


The Next Solutions Group names Michelle Agnew as VP, reputation and issues management. Agnew joins NSG from The Coca-Cola Company, where she was director of strategic communications... Nebius, which works with startups and enterprises building AI products, agents and services, appoints Lindsey Irvine as CMO... Zeta Global, an intelligent AI infrastructure company, names Leah Pope CMO and Candace Dean chief communications officer.
SiriusXM recruits Paramount Pictures EVP, global communications Jenny Tartikoff to serve as SVP and head of communications, effective August 10.
West of Fairfax, which is in Los Angeles, appoints Scott Mallone as president. Mallone joins the agency from SHFT Labs... Codeword ups Brandon Carter to SVP, head of strategy... JOTO PR Disruptors names Nick Westcott head of establishment, working to improve coordination across departments, and helping each part of the agency operate with greater clarity, consistency and readiness for scale.
Sotheby’s brings on Christie’s global head of communications Natasha Le Bel to serve as chief communications officer.
The U.S. Green Building Council, developer of the LEED (Leadership in Energy and Environmental Design) rating system, names David Purcell CMO, leading the organization’s marketing and communications... Capital V Strategies, a strategic communications and advisory firm, names Andy Dueñas to lead its newly launched Transactions & IPO Communications division... Haven Tower Group, which works with clients in the wealth management space, appoints Stephen Langlois to its board of advisors. Langlois is currently managing principal of Seaport Consulting Partners. 



