Ereli said it was “an honor and privilege to be part of this unique team of professionals.”
“Mercury represents the pinnacle of integrity and creativity in the field of strategic advising. Developments across the globe — political, economic and social — present a wealth of opportunities to apply the firm’s considerable expertise to international challenges,” Ereli said.
Ereli has held several positions at the State Department.
He recently was principal deputy assistant Secretary of State for educational and cultural affairs. Before that, he was ambassador to Bahrain from 2007 to 2011. Ereli also served as State's deputy spokesman from 2003 to 2006.
Mercury merged with Clark & Weinstock in 2011, boosting its lobbying roster. The combined firm, operating under the name Mercury/Clark & Weinstock in Washington, has made nearly $3.7 million in lobbying fees so far in 2013, according to the Center for Responsive Politics.
The firm represents several foreign governments in Washington, including Nigeria and Mauritius, according to Justice Department records.