Thunder11: NYC C-Level Communications Boutique Profile

Thunder11 is a New York C-level communications boutique co-founded in 2007 by Marco Greenberg and Liel Leibovitz, serving public affairs, technology and healthcare clients. PRWeek's launch report described a Cambridge, Massachusetts communications cooperative that used short-term contracts of no more than 90 days. Greenberg is senior partner and Leibovitz creative partner, and former Associated Press executive Dan Perry joined as managing partner in October 2020, per Provoke Media.

Originally published June 2026. Updated October 18, 2026.

How did Thunder11 start?

PRWeek reported that Thunder11 launched as a communications cooperative drawing on a network of specialists in fields including website development and SEO. The firm was designed to launch or jump-start organizations through short-term contracts of no longer than 90 days, focused on proprietary market intelligence, big idea generation and new media. It described Greenberg as a former PR agency owner and Leibovitz as a Columbia University graduate with a doctorate in communications.

Who founded and leads Thunder11?

CommPRO says Greenberg was previously a managing director at Burson-Marsteller and founded and led the firm NYPR, and that he wrote Primitive, a 2020 Wall Street Journal bestseller. Leibovitz is an NYU communications professor, host of the Unorthodox podcast and author of books including A Broken Hallelujah and Stan Lee: A Life in Comics, per the same release. Provoke Media reported on October 16, 2020 that Perry, a longtime Associated Press foreign correspondent, joined as managing partner after acting as counsel for Thunder11 since leaving AP in 2018. Talking Biz News adds that he helped lead AP coverage that won Pulitzers, chaired the Foreign Press Association in Jerusalem and holds a master's degree in computer science from Columbia. Perry's role is to oversee operations and client service, pursue global partnerships and scale the business.

Person	Role	Source
Marco Greenberg	Senior partner, co-founder	Provoke Media; CommPRO
Liel Leibovitz	Creative partner, co-founder	Provoke Media; CommPRO
Dan Perry	Managing partner since October 2020	Provoke Media
Ryan Birchmeier	VP of media relations in 2020; later SVP of client relations and equity partner	Provoke Media; CommPRO

What does Thunder11 do?

A BioSpace release lists messaging and brand identity, thought leadership, content creation, crisis and issues management, and communications and sales force training. Perry's hire was meant to expand public affairs, technology, sustainability and healthcare work and to serve as a gateway to Israeli companies seeking global awareness, per Talking Biz News. CommPRO reported that the firm launched a podcast called Public Health about the people who make health systems run, and a trans-Atlantic partnership with the Paris-based agency JIN offering creative and digital capabilities. EPR's technology PR and crisis PR pages cover its categories.

Which clients has Thunder11 worked with?

Provoke Media named Northwell Health, described as New York's largest employer, which the firm had served for more than six years by 2020. A BioSpace release says BioHarvest Sciences engaged it as public relations agency of record. CommPRO says Birchmeier's role supports a growing client base in health care, tech and public affairs.

What recognition has Thunder11 received?

A BioSpace release says the firm was named Boutique PR Firm of the Year at the Platinum PR Awards in 2019 and was on the Agency Elite Top 100 in 2020. These are the firm's own statements.

How does Thunder11 compare with other New York boutiques?

Thunder11 is a small senior-led New York firm, so compare it with Channel V Media, Anat Gerstein and Inkhouse.

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