How many employees does ICF have?

ICF has 10,748 employees on LinkedIn, down 2% over the last 12 months.

Where is ICF headquartered?

ICF is headquartered in Reston, United States.

Who are ICF's competitors?

Companies similar to ICF include Jacobs, The Cadmus Group, Tetra Tech, RTI International and Hatch Ltd.

What technologies does ICF use?

ICF's website uses HSTS, Microsoft ASP.NET, Sitecore, Google Maps and AngularJS and 7 more.

icf.com

ICF competitors and similar companies

10,748 employees on LinkedIn, down 2% in 12 months. 10 similar companies, with why each one matches.

About ICF

We work with hundreds of companies and governments to plan, design, and implement transformative projects. Learn more about ICF.

Headquarters: Reston, United States
Employees on LinkedIn: 10,748
Headcount, last 12 months: -2%
Industry: Energy
Founded: 1969
Open jobs: 636

Data last updated October 3, 2026

How ICF sells and hires

Hiring

Very high hiring pace
Leadership roles open in engineering, finance, HR and sales
6+ open roles each in finance, customer relations, engineering, HR, legal, marketing, product, quality control and sales
2-5 open roles in design

Companies similar to ICF

Found by Ocean's lookalike search, with what each company has in common with ICF.

Jacobs
jacobs.com

Jacobs Solutions is a global provider of engineering, design, procurement, construction, and maintenance services as well as cyber engineering and security solutions. The firm serves industrial, commercial, and government clients in a wide variety of sectors, including water, transportation, healthcare, technology, and chemicals. Jacobs Solutions employs approximately 60,000 workers. The company generated $12 billion in revenue in fiscal 2025.

United States · 66,983 employees on LinkedIn
- Both in Consulting
- Both hiring an engineering leader
- Both based in United States
The Cadmus Group
cadmusgroup.com

Provider of strategic and technical consultancy services intended for government, commercial and non-governmental organizations. The company specializes in energy, climate, water, public health, safety and security, international development as well as transportation consultancy, enabling clients to create a social impact, enhance economic value and enhance community safety on a global scale.

United States · 680 employees on LinkedIn
- Both in Consulting
- Both based in United States
Tetra Tech
tetratech.com

We are improving the quality of life for people around the world through science, technology, and innovation.

United States · 27,502 employees on LinkedIn
- Both hiring an engineering leader
- Both based in United States
RTI International
rti.org

RTI is an independent scientific research institute dedicated to improving the human condition. Explore our services, practice areas and more.

United States · 6,580 employees on LinkedIn
- Both hiring an engineering leader
- Same size: 5,001-10,000 employees
- Both based in United States
Hatch Ltd
hatch.com

Provider of technical and strategic consulting services intended for the mining, metallurgical, energy and infrastructure industries. The company offers project management, engineering, process development, and construction management, thereby enabling clients to optimize environmental protection, economic prosperity and cultural vibrancy.

Canada · 11,431 employees on LinkedIn
- Both in Consulting
- Both hiring an HR leader
- Same size: 5,001-10,000 employees
- Both use Wistia
Synapse Energy Economics
synapse-energy.com

Synapse Energy Economics is a research company providing electric power analysis services.

United States · 59 employees on LinkedIn
- Both in Consulting
- Both based in United States
Ramboll
ramboll.com

Creating sustainable societies where people and nature flourish.

Denmark · 16,794 employees on LinkedIn
- Both in Consulting
- Both hiring an engineering leader
- Both use Wistia and AngularJS
Trinomics
trinomics.eu

Energy, Environment & Climate Change Consulting

Netherlands · 57 employees on LinkedIn
- Both in Consulting
AECOM
aecom.com

Aecom is one of the largest global providers of advisory, design, and engineering services. It serves a broad spectrum of end markets, including water, transportation, and environment. Based in Dallas, Aecom employs 51,000 people. The company generated $16.1 billion in sales in fiscal 2025.

United States · 60,210 employees on LinkedIn
- Both in Consulting
- Both hiring an engineering leader
- Both based in United States
- Both use Wistia
Arcadis
arcadis.com

Arcadis is the leading global design & consultancy organization for natural and built assets. We are over 29,000 people, active in more than 70 countries that generate €3.4 billion in revenues.

Netherlands · 42,064 employees on LinkedIn
- Both in Consulting
- Both hiring an engineering leader
- Both use Appian

Technologies ICF uses

HSTS
Microsoft ASP.NET
Sitecore
Google Maps
AngularJS
Swiper
React Flow
Appian
Wistia
SiteLock
Google Tag Manager
jQuery

Questions about ICF

How many employees does ICF have?: ICF has 10,748 employees on LinkedIn, down 2% over the last 12 months.
Where is ICF headquartered?: ICF is headquartered in Reston, United States.
Who are ICF's competitors?: Companies similar to ICF include Jacobs, The Cadmus Group, Tetra Tech, RTI International and Hatch Ltd.
What technologies does ICF use?: ICF's website uses HSTS, Microsoft ASP.NET, Sitecore, Google Maps and AngularJS and 7 more.
When was ICF founded?: ICF was founded in 1969.