On May 18, 2013, Dr. Ernest J. Moniz, a director of ICF International Inc. submitted his resignation from the company's Board of Directors and the Audit Committee, effective immediately, due to his confirmation as the Secretary of Energy of the United States on May 16, 2013.

ICF International Inc. named Subodh Karnik to the position of vice president for ICF SH&E, which provides professional services in the aviation and aerospace fields. A senior executive with more than 30 years of experience, Mr. Karnik will build upon ICF SH&E's five decades of successfully assisting airline, aerospace, and travel companies to enhance their value through rigorous planning, restructuring, and operations improvements. He will work with clients across the globe and with ICF's aviation teams in Beijing, Boston, Hong Kong, London, and New York.

ICF International Inc. reported unaudited consolidated earnings results for the first quarter ended March 31, 2013. For the quarter, the company’s gross revenue was $233,921,000 against $227,641,000 a year ago. Operating income was $17,649,000 against $16,374,000 a year ago. Income before income taxes was $16,959,000 against $14,896,000 a year ago. Net income was $10,112,000 or $0.51 per diluted share against $8,937,000 or $0.45 per basic and diluted share a year ago. EBITDA was $22,841,000 against $21,600,000 a year ago. Adjusted EBITDA was $22,841,000 against $22,225,000 a year ago. Net cash provided by operating activities was $13,307,000 against $11,003,000 a year ago. Capital expenditures were $3,621,000 against $5,626,000 a year ago. Profitability continues to increase in a faster pace than revenue growth as plant makes changes to a high-potential commercial business and it maintain control over the general and administrative spending. First quarter profitability also benefited from the effective management of certain fixed-priced contracts and incentives related to energy efficiency contracts. The growth at operating income continues to outpace the revenue growth due to the increasing percentage of revenues being derived from higher margin, commercial clients and ongoing ability to control cost. The company reaffirms its guidance for full year 2013 revenues of $935 million to $975 million, EBITDA margin of 9.5% to 10.5%, and earnings per diluted share of $2.00 to $2.10. Guidance is based upon approximately 20 million diluted weighted average numbers of shares outstanding and an effective tax rate of 39%. Operating cash flow for 2013 is estimated to exceed $70 million.