ICF International : Annual Meeting of Stockholders

Message from Chair, President and CEO John Wasson

2022 was an exciting and eventful year for the world and for ICF. As we stated last year, the COVID-19 pandemic had delayed our return to the office, and we did in fact return to the office in the fall of 2022 and occupied our new HQ in Reston, VA even as we learned to operate in a new hybrid workplace model. Regardless of workplace, ICF employees have continued providing the same innovative and dedicated support and solutions to our clients, generating growth and profitability that helped establish 2022 as another record-breaking year for the company's revenue and earnings. Also contributing to those records were the acquisition of SemanticBits in July 2022 and Blanton & Associates in September 2022. SemanticBits adds to the acquisitions of ITG in 2020 and Creative Systems and Consulting in 2021, combined with the legacy technology work long performed by ICF, to create what is now a market-leading technology powerhouse that delivers tech solutions on a par with ICF's long-standing domain expertise.

ICF's continued alignment with current Administration priorities was further highlighted in 2022 as the Inflation Reduction Act (IRA) was passed, representing the largest climate change-fighting piece of legislation ever passed. The IRA's collection of tax incentives and grant programs will accelerate the adoption of clean energy and support the missions of many of ICF's important clients in future years.

This year represented an important period in the implementation of our consistent long-term strategy. ICF continues to serve clients in the public and private sectors, bringing them valuable expertise which is increasingly combined with technology and engagement solutions. ICF's approximately 9,000 employees, in offices throughout the US and worldwide, work every day to fulfill our purpose:

"To build a more prosperous and resilient world for all"

2022 Performance

2022 was another year of growth and success for ICF.

• Our gross revenue increased 14.6% to $1.78 billion, reflecting a mix of organic growth and service revenue from the direct work of ICF employees, which increased 15.8% to $1.29 billion.
• We were awarded contracts valued at over $2.3 billion, a record for the Company, following a record- breaking year in 2021.

• We delivered $3.38 in diluted GAAP earnings per share (EPS), down 9% from 2021, and $5.77 in Non-GAAP EPS1, up 19.7% from 2021.

ICF remained focused on delivering value for our clients, opportunities for our people, and returns to our shareholders in a changing world. ICF empowered government leaders across the world to transform how services are delivered to their citizens, while also enabling business leaders to deliver greater efficiency and improved value to their customers and stakeholders. Our performance in 2022 continued to show the benefit of our approach to impact multiple markets.

• Our work for the U.S. federal government, as ICF continued to support many of the nation's most important civilian missions. ICF won significant awards of new business and numerous important recompetes. Our capabilities have been augmented by the acquisition of SemanticBits, which brings top-tier capabilities in open-source technology solutions and deep client relationships in the Centers for Medicaid and Medicare Services (CMS) in the U.S. Department of Health and Human Services.
• Our work for U.S. state and local clients continues to support critical environmental needs, ranging from environmental protection in transport infrastructure implementation to water infrastructure and habitat protection. This work will be strengthened by our acquisition of Blanton & Associates, which extended our environmental services portfolio in Texas and the Southwest. Our disaster management business continues to support communities devastated by major hurricanes and wildfires as they rebuild, and other communities seeking to mitigate disaster impacts before they occur.
• Our commercial energy business continued to grow as it accelerated its design and delivery of innovative electrification, low-income, and demand-side management programs. Combining utility expertise with cutting-edge analytics and innovative program design, our experts help utility customers save money and help the energy system decarbonize and accelerate the clean energy transition.
• ICF's work for international clients was reduced, due primarily to the ending of a one-time pandemic- related contract for a European government client in early 2022. European Union clients continued to stabilize their operations in response to shifting COVID-19 pandemic impacts and the Russian invasion of Ukraine.
• Our marketing and communications services, under our ICF Next brand, continued to support our clients' businesses and were recognized for their creativity and impact with SABRE awards. We have also expanded our roster of leading hospitality clients for our loyalty services.

As mentioned above, in the 4th quarter we moved into our new headquarters in Reston, VA. The new location provides a more energy-efficient building, with more modern space for collaboration amongst our teams and their clients, and cost savings that support our bottom line. We plan to continue to take action to rationalize our real estate footprint in the coming years.

• Service Revenue and Non-GAAP EPS are non-GAAP measurements. A reconciliation of all non-GAAP measurements to the most applicable GAAP number can be found beginning on Page 44 of the Company's Annual Report on Form 10- K for the year ended December 31, 2022, filed with the U.S. Securities and Exchange Commission on March 1, 2023.
  The presentation of non-GAAP measurements may not be comparable to other similarly titled measures used by other companies.

In 2021, the passage of the Infrastructure Investment and Jobs Act (IIJA) provided support for public investment that could indirectly support and sustain some of ICF's important markets. In 2022, the passage of the IRA introduced wide-ranging tax credits and a variety of grant programs designed to speed the adoption of low-carbon technologies. These programs do provide some direct opportunity for ICF support, but especially provide impetus to the decarbonization of the US economy which generates opportunity indirectly as we support those decarbonization efforts. These programs were among those we referred to last year when we referenced the broader Build Back Better initiative. The IRA also supports the transformation of the U.S. Department of the Treasury, where ICF has had success in driving digital modernization efforts.

Work That Makes Us Proud

ICF is proud of the work we do. While the breadth of our client services makes a comprehensive description impossible here, below are a few ways we make a difference to our clients and to society:

• ICF substantially grew our technology delivery capability to serve numerous clients around the U.S. government. ICF solutions range from targeted applications for moderately-sized business processes to large-scale digital transformation efforts reaching all corners of an agency's operations. The fullest expression of these efforts are the Digital Service Centers, where we support ongoing digital transformation as a trusted partner for CIOs, e.g. in the National Cancer Institute and the U.S. Department of Agriculture. We enable these clients to accelerate transformation of their legacy processes by creating trust and applying multiple skillsets from information security to user experience and design. We have delivered hundreds of individual applications inherently aligned with our clients' enterprise architectures.
• ICF continues to enhance our work in support of the nation's Public Health enterprise. Among many other awards, in 2022 we won a contract to help a major Public Health client transition critical systems to the cloud. We are also proud of our partnership with Morehouse School of Medicine - together we crafted and delivered multiple COVID-19 communications campaigns designed specifically for a variety of minority and disadvantaged communities, delivering critical health messages benefitting these communities can trust and act on.
• Our disaster management business has been assisting Texans to return to their damaged homes. We've been on the ground since January 2019, partnering with state and local officials to enable home reconstruction or rehabilitation for those affected by Hurricane Harvey. We provide a range of housing regulatory, project implementation, and program oversight assistance for more than $1.8 billion in housing rebuilding assistance. The programs we support include the Homeowner Assistance Program, Local Buyout and Acquisition Program, and Homeowner Assistance and Reimbursement Program.
• ICF has worked for years in support of the U.S. Global Change Research Program (USGCRP), the coordinating effort for all U.S. federal climate change research. This year that work included the release for public comment of the Fifth National Climate Assessment, a comprehensive report which integrates findings across the program and analyzes the current effects and trends of climate change in and on natural and man-made systems. ICF experts also attended the COP27 conference to connect to world leaders to continue to coordinate the fight against climate change with our counterparts across the world.

• The combination of the Infrastructure Investment and Jobs Act, the Inflation Reduction Act, and new U.S. federal policy has accelerated the deployment of new renewable electricity generation. ICF is on the leading edge of this effort as we support the revolutionary deployment of offshore wind power though our environmental services and energy advisory work. This work supports the build-out of multiple offshore wind farms off the Atlantic coast as well as initial efforts to deploy floating offshore wind on the Pacific coast, including the land-based infrastructure development that will be necessary for those investments to come to fruition.
• ICF has grown our work supporting utilities across North America as they work to manage demand and advance their efforts to decarbonize the energy mix. This work includes managing innovative pricing programs to encourage utility customers to use electricity during hours when the grid is least stressed and electrification programs to accelerate the replacement of fossil fuel-powered machinery and infrastructure with electrified replacements. Other efforts are helping utility clients install battery storage devices that help lower costs and enhance overall grid reliability. A growing emphasis for many of our utility clients is an effort to support low-income and disadvantaged customers who may not be reached by traditional energy efficiency and other programs. ICF brings long-standing expertise in working with these communities and we are excited by the possibilities unlocked by getting them more involved in the energy transition.
• In Europe, ICF has been proud to support the European Solidarity Corps, an initiative co-created with young people, helping participants make the most out of their experience by offering a wide range of learning opportunities targeted to young people aged 18-35 years. The training not only encourages young people to participate in the Solidarity Corps, but to engage in their local communities and act as multipliers of change. By focusing on key content such as active European citizenship, climate change, intercultural learning, leadership, humanitarian aid, mental health - and much more - young people can select the topics that interest them or follow a set learning journey, take part in quests, reflection moments and exercises such as teamwork, public speaking, meditation and much more.

Environment, Social, and Governance (ESG) Commitment

Much of ICF's ESG data, and explanations of how ICF employees contribute positively to our societies and our world, can be found in our award-winning Corporate Citizenship Report published mid-year:

https://www.icf.com/company/about/corporate-citizenship.The Report also serves as the reporting vehicle for

data aligned to both the Sustainability Accounting Standards Board (SASB) and the Task Force on Climate- related Financial Disclosures (TCFD).

In 2022, ICF continued and extended our commitment to ESG principles. ICF's corporate giving totaled $787,000, driven by our employees' choices of causes and their own donations; employees personally volunteered thousands of hours and donated $671,000 to a variety of causes and philanthropic initiatives. Our employees' generosity is an inspiration and example for us all.

Each year ICF takes inventory of our carbon emissions. To sustain ICF's 16-year commitment to carbon neutrality in 2022, we purchased 100% net renewable electricity for U.S. operations via renewable energy certificates that are Green-e® certified while mitigating the remainder of our Scope 1 and some Scope 3 emissions (including those from business travel and employee commuting, which are the three sources of greatest impact) with high-quality offsets (including carbon removal). ICF continues to employ many

sustainability tactics such as reducing our real estate footprint, prioritizing leases in green buildings (notably including our new HQ), providing online collaboration tools to reduce the need for business travel, and promoting a commuter transit benefit. The 2023 Proxy Statement includes data showing ICF's progress in reducing emissions, both per employee and on an absolute basis.

ICF has long disclosed information concerning our carbon footprint through CDP (formerly the Carbon Disclosure Project), and we have been pleased to have received a grade of "A/A-" for several years running. In 2022, we were grateful to be awarded an "A-", demonstrating our continued excellence in reducing our carbon footprint.

In 2022, ICF matured our Diversity, Equity, and Inclusion program. Our 8 Employee Community Networks (ECNs) support under-represented communities (over 25% of our employees are involved in at least 1 ECN), and in 2022 they held over 60 events on topics as wide-ranging as employee development, cultural expression, talent acquisition, and charitable giving. We are proud to be recognized by Forbes in 2022 for being among both the Best Employers for Diversity and for Women. ICF believes that fulfilling our purpose can only occur if all ICFers are in an environment that allows them to do their best work and succeed without barriers.

We have also expanded our Diversity, Equity, and Inclusion efforts to have impact beyond ICF's internal operations. This year we appointed our first-ever Vice President of Equity and Inclusion for public sector clients who ensures we view each client project through an equity lens and that we deliver outcome-oriented solutions that help federal agencies better address the needs of underserved communities.

Our People

I am proud to stand alongside our entire team here at ICF. We are pleased to welcome all the new ICFers who have joined us whether through individual recruiting or our acquisitions - I know they will be as committed as the longest-standing ICFer in advancing our values and fulfilling our purpose. We are excited to be back in the office while continuing to live our purpose and values every day to grow and expand value for our clients and to benefit the world.

Wishing you all success in 2023, and continued health and safety for you and yours!

John Wasson

Chair, President and Chief Executive Officer