Allen & Sheppard Competitors

AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients’ complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2024. Learn more at aecom.com.

For over 75 years SMEC has been a trusted partner on major transport, water and energy infrastructure projects around the world. We deliver positive impact to the people, environment, clients and communities we serve. As an SJ Group company, we are a diverse multidisciplinary team across 40+ countries, enabling us to have global reach with local impact. Through our network of global specialists, we draw on deep expertise and systems thinking to simplify the complex and deliver integrated engineering solutions across a range of diverse environments. SMEC has its origins in the iconic Snowy Mountains Hydroelectric Scheme, recognised as one of the civil engineering wonders of the modern world. Standing on the shoulders of these early pioneers, we have built on their innovation, resilience and achievements and evolved into a global leader in engineering and design solutions that move and connect people, provide access to essential resources and build more sustainable communities around the world. Want to engineer positive change with us? If you value technical excellence, underpinned by sustainability and want to create real impact, then we’d love to hear from you! Join our expert and innovative teams in one of our 40+ locations. Visit our careers page for current vacancies.

Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide. With 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 le domaine de l'eau, de l'environnement et des infrastructures durables, offrant des services de génie-conseil et d'ingénierie de qualité supérieure pour des projets à l'échelle mondiale. À travers nos 25 000 associés, 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.