Executive Leadership

Click on each image to read staff biographies or scroll down to learn more about our practice leaders and business and corporate development team.

Frank Abramcheck	Douglas Beck	Michael Byrne	John Cowdery	Gerald Croan

Ellen Glover	Sudhakar Kesavan	Candice Mendenhall	Sandra Murray	Philip Mihlmester	Sergio Ostria

Isabel Reiff	Alan Stewart	Jeanne Townend	David Treitel	John Wasson	Donald Zimmerman

Sudhakar Kesavan
Chairman & Chief Executive Officer

Sudhakar Kesavan serves as the Chairman and CEO of ICF International. In 1997, he was named President of the ICF Consulting Group when it was a subsidiary of ICF Kaiser. In 1999, the Group was divested from Kaiser and became a wholly owned subsidiary of the Company through a joint effort of the management and CM Equity Partners, and ICF International was launched as an independent company.

Mr. Kesavan received his Master of Science degree from the Technology and Policy Program at the Massachusetts Institute of Technology (MIT), his postgraduate diploma in Management from the Indian Institute of Management, Ahmedabad, and his Bachelor of Technology degree (chemical engineering) from the Indian Institute of Technology, Kanpur. Mr. Kesavan serves on the Board of the Rainforest Alliance, a New York based nonprofit environmental organization committed to protecting ecosystems by transforming land-use practices, business practices, and consumer behavior. 

Mr. Kesavan received the Executive of the Year award in the 2009 Greater Washington Government Contractor Awards in the large-sized firm category. In 2007, Washington SmartCEO honored him as one of the Future 50, the magazine’s honor to chief executives of the Washington metropolitan area's fastest growing companies. Learn more about Mr. Kesavan and ICF International.

John Wasson
Executive Vice President - Chief Operating Officer

John Wasson, an Executive Vice President, has been with ICF International since 1987. He leads the Company's seven practices. He holds a M.S. in Technology and Policy from the Massachusetts Institute of Technology and a B.S. in Chemical Engineering from the University of California, Davis.

Alan Stewart
Chief Financial Officer

Alan Stewart serves as Chief Financial Officer and has been with ICF International since 2001. Prior to joining the Company, Mr. Stewart was chief financial officer at DataZen Corporation, Blackboard, Inc., and Deltek Systems, Inc., which he helped take public in 1997. Mr. Stewart received his B.S. in Accounting from Virginia Commonwealth University and is a Certified Public Accountant. In 2008, Mr. Stewart was named a finalist for the Washington Business Journal Award for Financial Excellence.

Candice Mendenhall
Senior Vice President

Candice Mendenhall joined ICF International in 2008 as Senior Vice President of Human Resources. Prior to ICF, Ms. Mendenhall served as senior vice president of human resources and shared services at Ratner Companies and has held senior leadership positions with Performance Choice Consulting, Freddie Mac, Manchester, Inc., and Mellon Financial Corporation. She holds a B.S. from Brigham Young University.

Sandra Murray
Senior Vice President

Sandra Murray joined ICF International in 2009 as Senior Vice President of Administration and Contracts. Prior to ICF, Ms. Murray served as Senior Vice President—Finance and Business Operations at Science Applications International Corporation (SAIC), and has held leadership positions at ARINC, Honeywell Technology Solutions, and Atlantic Research Corporation. She holds an M.B.A. in Finance from Loyola College and a B.S. in Accounting from the University of Baltimore.

Business & Corporate Development

Dr. Douglas Beck
Senior Vice President

Douglas Beck has been with ICF International since 1995. He is the Director of Corporate Development. Prior to joining ICF International, he held executive positions at DRI/McGraw-Hill. Mr. Beck has a Ph.D. and M.A. in Political Science from the University of Rochester, M.B.A. in International Business from Columbia University, and B.A. in Economics and Political Science from the University of Michigan.

Michael Byrne
Senior Vice President

Michael Byrne joined ICF International in 2006 with extensive public service experience in regional preparedness, response, recovery, and information sharing. He is senior advisor for Emergency Management and Homeland Security. His career ranges from managerial and advisory roles at Microsoft Corporation, The White House Office of Homeland Security, and the U.S. Department of Homeland Security, to 20 years as a firefighter and executive with the New York City Fire Department. Mr. Byrne holds a B.A. from the City University of New York at Queens College.

Isabel Reiff
Senior Vice President

Isabel Reiff joined ICF in 1989 and has more than 30 years of experience in public policy and program consulting. She leads the firm's government sector business development. At ICF she has managed client engagements in housing and community development, environment, and transportation. She has also held positions with federal and local governments. She holds a B.A. from Mount Holyoke College and an M.A. in Architecture and Urban Planning from the University of California, Los Angeles.

Donald Zimmerman
Executive Vice President

Donald Zimmerman is the former CEO of Synergy, Inc., which was acquired by ICF International in 2005. He is the Director of Strategic Initiatives for ICF International and has performed and led numerous client engagements in public policy, program analysis, and economics. He has held economic policy positions at the White House and at the Federal Trade Commission. Mr. Zimmerman holds both a B.S. and an M.S. in Economics from Illinois State University.

Chairs & Practice Leaders

John Cowdery Senior Vice President Environment, Planning, & Infrastructure John Cowdery is the former President and CEO of Jones & Stokes Associates, which was acquired by ICF International in 2008. He has been in the environmental consulting industry for more than 20 years and has been involved in natural resource management, transportation, energy, water-related issues, health and safety, and regulatory development. Mr. Cowdery holds a B.S. in Health from Keene State College, an M.S. in Health from Southern Illinois University, and an M.B.A. from Saint Mary’s College.

Gerald Croan
Executive Vice President
Strategic Enterprise Services

Jerry Croan is the former founder and president of Caliber Associates, which was acquired by ICF International in 2005. A leader in the design and assessment of effective human services program, he has been recognized for his innovative, client-focused work by the U.S. Departments of Defense, Justice, and Health and Human Services. He holds a B.S. and a M.C.P. (city planning) from the Massachusetts Institute of Technology (MIT).

Ellen Glover Executive Vice President Technology & Management Solutions Ellen Glover joined ICF International in 2005 and has 25 years of professional experience in information technology in the U.S. Federal Government market. In 2007, she received the Janice K. Mendenhall Spirit of Leadership Award, the highest honor given by the American Council for Technology and the Industry Advisory Council (IAC). She also received the Federal 100 Eagle Award in 2001 for her efforts to improve communication between government and industry and is past chair of the Industry Advisory Council (IAC). Ms. Glover holds B.A. and M.S. degrees from the University of Pittsburgh.

Philip Mihlmester
Senior Vice President
Energy, Climate, & Transportation

Philip Mihlmester joined ICF International in 1999 and has 30 years of experience in the technical and management direction of engagements in the energy, environmental, and quantitative analysis areas. He also has held executive positions at Aspen Systems and Applied Management Sciences. Mr. Mihlmester has an M.S. in Operations Research from George Washington University and an A.B. in History from Columbia.

Sergio Ostria Senior Vice President Energy, Climate, & Transportation Sergio Ostria joined ICF in 1999 and has more than 20 years of experience developing and leading multidisciplinary teams servicing government and commercial clients in the U.S., Latin America, Europe, and Asia. He specializes in the design, implementation, and evaluation of integrated, systems-oriented approaches to solving challenges that transcend the environment, energy, and transportation fields. Mr. Ostria has an M.A. in Economics from The George Washington University and a B.A. in Economics from University of Maryland.

David Treitel Senior Vice President Energy, Climate, & Transportation David Treitel is the former president of SH&E, which was acquired by ICF International in 2007. He has provided consulting services in the commercial aviation industry for more than 30 years. His expertise includes route, fleet, and strategic planning; finance and valuation; restructuring; industry analysis; management consulting; and corporate strategy services. He has appeared as an expert witness before the U.S. House of Representatives Aviation Subcommittee, Department of Transportation, and state and federal courts. Mr. Treitel holds a B.A. from Middlebury College and M.B.A. from Columbia University.