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Parsons Corporation
Founded in 1944, Parsons Corporation, a digitally enabled solutions provider, is focused on creating the future of the defense, intelligence, and critical infrastructure markets. From Earth to outer space, we deliver tomorrow’s solutions today. Equipped with the capabilities required to take on any defense, intelligence, or critical infrastructure challenge, our agile, innovative, and disruptive approach enables us to deliver solutions at the speed of relevance. Our people are our greatest asset. We strive to be an employer of choice that engages employees in the community and creates rewarding career paths to cultivate a resilient workforce that is ready for the future. #WeAreParsons Disclaimer: Parsons is aware of recruitment scams where individuals posing as Parsons representatives offer fraudulent job opportunities to steal personal information or solicit money. To avoid these scams, remember that Parsons will never ask for money or sensitive personal details, and all legitimate job openings are listed on https://jobs.parsons.com/; report any suspicious activity to local law enforcement or security@parsons.com.
Chantilly, Virginia, US
Public
$6.5B Revenue
http://www.parsons.com
21K Employees
PSN Ticker
Tetra Tech
Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide. With more than 25,000 employees working together, Tetra Tech provides clear solutions to complex problems by Leading with Science® to address the entire water cycle, protect and restore the environment, and design sustainable and resilient infrastructure. Tetra Tech est un chef de file mondial dans les domaines de l'eau, de l'environnement et des infrastructures durables, offrant des services techniques et d'ingénierie de qualité supérieure pour des projets à l'échelle mondiale. Grâce à ses 25 000 employés, Tetra Tech propose des solutions optimales aux problèmes les plus complexes en utilisant la science d’abord pour répondre aux besoins en matière de cycle de l'eau, en protection et restauration de l'environnement ainsi qu’en conception d’infrastructures durables et résilientes.
Pasadena, California, US
Public
$2.8B Revenue
http://www.tetratech.com
27.5K Employees
TTEK Ticker
SmithGroup
SmithGroup is an award-winning, multi-national integrated design firm that employs research, data, advanced technologies and design thinking to help clients solve their greatest challenges. Working across 21 locations throughout the U.S., our network of 1,600 experts is committed to excellence in strategy, design and delivery. Across more than 20 design disciplines, we work collaboratively and creatively, sharing ideas and learning from one another. Our integrated design approach blends aesthetics with performance, sustainability, and resiliency to create a better tomorrow—for clients, employees, the community, the environment, and our collective future. Our unique culture and impact on the built environment have received recognition from top-ranking institutions, publications and design authorities the world over. In 2025 and 2026, we were named a Top Workplace in the United States by Energage and USA Today.
Detroit, Michigan, US
Private
$298.8M Revenue
http://www.smithgroup.com
1.9K Employees
G2 Leader Summer 2026 G2 Best Est ROI Mid-Market Summer 2026 G2 Easiest Admin Mid-Market Summer 2026 G2 Most Implementable Summer 2026 G2 Best Results Mid-Market Summer 2026 G2 Lead Capture Mid-Market Summer 2026 Inc Fastest Growing Private Companies 2026 Inc Best Workplace 2026
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