John D. Cahill

Vice Chairman

As vice chairman of O’Neill and Associates, John D. Cahill oversees O’Neill and Associates’ federal relations practice. He specializes in national and federal issues related to transportation, healthcare, education, homeland security, and finance.

Drawing upon nearly thirty years of experience, Mr. Cahill has advised clients such as the Massachusetts Port Authority, Wheaton College, Tufts Health Plan, the Commonwealth of Puerto Rico, L-3 Security Systems, the Massachusetts Executive Office of Transportation, Legal Sea Foods, American Express Centurion Lounge, and Solix. The Boston Herald lists Mr. Cahill among Boston’s ten most powerful people (“Hub’s Power 10”). Highlights of Mr. Cahill’s work include:

  • Led the federal authorization, legislative and funding lobbying team on behalf of the $14.7 billion Central Artery/Third Harbor Tunnel Project beginning in 1983;
  • Developed and implemented the federal funding strategy for the Boston Harbor Cleanup, including securing the first $100 million appropriation for the project and ensuring subsequent federal funding in ensuing years;
  • Designed and implemented the federal funding strategy for the Commonwealth of Puerto Rico’s $2 billion Tren Urbano public transit project;
  • Advised the administration of Massachusetts Governor Mitt Romney on federal transit legislation from 2003 through 2005. Mr. Cahill continues to focus on federal appropriations, healthcare, transportation, and homeland security; and
  • Advised and developed federal strategy for the Massachusetts Port Authority’s successful pursuit of a $42 million US DOT Fast Lane grant throughout 2016-2017.

Prior to joining O’Neill and Associates, Mr. Cahill served as director of external affairs for MassPort, which operates Logan International Airport, the Port of Boston, Hanscom Field, and other economic development interests. In this position, Mr. Cahill was responsible for all federal, state and local activities of MassPort, including legislative and policy matters related to its operation and finance, working closely with the aviation, finance, media and legal departments.  Additionally, Mr. Cahill participated in the Massachusetts Port Authority effort to gain federal approval of its $143 million reimbursement from the Transportation Security Administration based upon its first in the nation baggage security system immediately following September 11, 2001.

Mr. Cahill began his career in Washington, working in the Office of the Speaker of the U.S. House of Representatives, followed by service as a Special Assistant for Economic Development in the Massachusetts Office of Federal State Relations.

Mr. Cahill is a graduate of the University of South Florida. He is also an alumnus of the Johns Hopkins University School of Advanced International Studies, where he concentrated in international law, international economics, and Middle Eastern studies.

You can reach Mr. Cahill at 617-646-1049.