Exhibit 99.1

NEWS RELEASE

ICF Announces Timing of Third Quarter 2019 Earnings Release and Conference Call

Presenters:	Mr. Sudhakar Kesavan, Executive Chairman
	Mr. John Wasson, President and Chief Executive Officer
	Mr. James Morgan, Chief Financial Officer
Date:	Wednesday, November 6, 2019
Time:	4:30 p.m. Eastern Time
Dial-in:	1.888.771.4371 (U.S. toll free)
	Confirmation number: 4901 9402
Audio Webcast:	https://edge.media-server.com/mmc/p/idca4g33

FAIRFAX, Va. (October 2, 2019) — ICF (NASDAQ:ICFI), a global consulting and digital services provider, will release its third quarter 2019 results on Wednesday, November 6, 2019, after the market close. The results will be available at: http://investor.icf.com.

To participate in the conference call, please register at https://edge.media-server.com/mmc/p/idca4g33 at least 15 minutes prior to the call and download and install any necessary software. Individuals interested in participating in the call should dial 1.888.771.4371 (U.S. toll free) and use access code 4901 9402. An archive will be available for one year following the live event.

A digital recording of the conference will be available beginning at 7:00 p.m. Eastern Time November 6, 2019, through 11:59 p.m. Eastern Time November 20, 2019. You may listen to the digital recording by calling 1.888.843.7419 (U.S. toll free) or +1.630.652.3042 (outside of the U.S.). The passcode is 4901 9402.

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For More Information

Investor information contact:

Lynn Morgen, AdvisIRy Partners, lynn.morgen@advisiry.com, +1.212.750.5800

or

David Gold, AdvisIRy Partners, david.gold@advisiry.com, +1.212.750.5800

Company information contact:

Lauren Dyke, ICF, lauren.dyke@icf.com, +1.571.373.5577

About ICF

ICF (NASDAQ:ICFI) is a global consulting services company with over 7,000 full- and part-time employees, but we are not your typical consultants. At ICF, business analysts and policy specialists work together with digital strategists, data scientists and creatives. We combine unmatched industry expertise with cutting-edge engagement capabilities to help organizations solve their most complex challenges. Since 1969, public and private sector clients have worked with ICF to navigate change and shape the future. Learn more at icf.com.

Caution Concerning Forward-looking Statements

Statements that are not historical facts and involve known and unknown risks and uncertainties are "forward-looking statements" as defined in the Private Securities Litigation Reform Act of 1995. Such statements may concern our current expectations about our future results, plans, operations and prospects and involve certain risks, including those related to the government contracting industry generally; our particular business, including our dependence on contracts with U.S. federal government agencies; and our ability to acquire and successfully integrate businesses. These and other factors that could cause our actual results to differ from those indicated in forward-looking statements are included in the "Risk Factors" section of our securities filings with the Securities and Exchange Commission. The forward-looking statements included herein are only made as of the date hereof, and we specifically disclaim any obligation to update these statements in the future.