Former State Department Adviser R.C. Hammond Joins Mercury

WASHINGTON, DC (November 29, 2022) – Mercury, a leading global, bipartisan public strategy firm, today announced the addition of R.C. Hammond as a Managing Director in its Washington office.

Hammond served as strategic counselor to former United States Secretary of State Rex Tillerson. He built a working knowledge of national security, public policy, and foreign affairs, joining the Secretary for global meetings of NATO, G-20, and discussions with international leaders and the heads of state for China, Russia, Australia, Great Britain, Canada, and Mexico.

“R.C. was on the ground in twenty-five countries, serving as a key adviser and spokesperson to the Secretary of State, bringing the experience and insights our clients need,” said Mercury CEO Kieran Mahoney. “He is a trusted crisis manager and communicator who has helped corporate leaders communicate during a crisis. We are thrilled to welcome him to the team.”

Hammond has been a spokesperson and senior advisor to the U.S. Secretary of State, Members of Congress and a presidential candidate. His most recent work has shaped corporate responsibility initiatives and supported companies and organizations in developing crisis management communication strategies. At Mercury, he will help lead issue campaigns and provide strategic media relations and crisis communication counsel for leading companies, trade associations, and political advocacy groups that achieve positive policy outcomes and improve the environment in which organizations operate.

About Mercury
Mercury is a high-stakes, bipartisan public strategy firm. The firm provides a comprehensive suite of services that includes federal government relations, international affairs, digital influence, public opinion research, media strategy and a bipartisan grassroots mobilization network in all 50 states. Our firm is not just led by top talent — we distinguish ourselves by having senior talent deeply engaged in each project from start to finish, a promise we keep to clients. The firm has U.S. offices in Washington, D.C., New York, New Jersey, Pennsylvania, Florida, Montana, Texas, and South Carolina. Mercury is a part of the Omnicom Public Relations Group.


About Omnicom Public Relations Group

Omnicom Public Relations Group is a global coll of three of the top global public relations agencies worldwide and specialist agencies in areas including public affairs, language strategy, global health strategy and change management. As the largest group of communications professionals in the world, our employees provide expertise to companies, government agencies, NGOs and nonprofits across a wide range of industries. Omnicom Public Relations Group delivers for clients through a relentless focus on talent, continuous pursuit of innovation and a culture steeped in collaboration. Omnicom Public Relations Group is part of the Communications Consultancy Network, a division of Omnicom Group Inc. (NYSE: OMC).

About Omnicom Group

Omnicom Group Inc. ( is a leading global marketing and corporate communications company. Omnicom’s branded networks and numerous specialty firms provide advertising, strategic media planning and buying, digital and interactive marketing, direct and promotional marketing, public relations and other specialty communications services to over 5,000 clients in more than 70 countries. Follow us on Twitter for the latest news.


Dan Wilson
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