AECOM is a global design and engineering firm that plans infrastructure, buildings, and environmental projects

AECOM is one of the world's largest architecture and engineering companies. It designs and manages projects across transportation, water systems, buildings, energy, and environmental remediation. The firm works for government agencies, private developers, and institutions — meaning you may encounter AECOM's work through a public infrastructure project in your area, a new building development, or an environmental cleanup effort.

AECOM operates in more than 150 countries and employs tens of thousands of architects, engineers, planners, and environmental scientists. The company does not build projects itself; instead, it designs them, manages construction, and oversees compliance with regulations. If a city is planning a new transit system, a state is remediating contaminated land, or a developer is designing a mixed-use complex, AECOM is often the firm hired to lead the planning and design work.

Understanding what AECOM does matters if you are affected by a project it is managing — whether that means a highway expansion near your home, a water infrastructure upgrade in your area, or a development proposal in your neighborhood. Knowing the firm's role helps you understand who to contact with questions and what stage a project is in.

Key Takeaways

  • AECOM designs and manages large infrastructure, building, and environmental projects for government agencies and private clients, but does not construct the projects itself.
  • The firm's work spans transportation, water systems, buildings, energy, and environmental cleanup across more than 150 countries.
  • If you are affected by a project AECOM is managing, the firm's role is to plan, design, and oversee the work — not to make final decisions about whether the project happens.
  • AECOM publishes project information and holds public meetings for major infrastructure and development work, which is where residents can learn details and provide input.
  • Contact information for specific projects is usually available through the government agency or developer funding the work, not directly through AECOM's main office.

The main divisions of AECOM's work

AECOM operates through several business lines, each focused on a different type of project. The Transportation division designs highways, transit systems, airports, and rail networks. The Water division works on water treatment plants, wastewater systems, stormwater management, and flood control. The Buildings division handles office complexes, hospitals, schools, and mixed-use developments. The Environment division manages contaminated site cleanup, environmental impact assessments, and sustainability planning.

The firm also operates an Energy division focused on power generation, grid modernization, and renewable energy projects. Each division has its own project teams, but they often work together on large, complex projects that involve multiple components — for example, a waterfront redevelopment might need transportation planning, environmental assessment, and building design all at once.

Most people encounter AECOM through public infrastructure work, because government agencies are among the firm's largest clients. A city planning a new bus rapid transit line, a state managing a highway reconstruction, or a county addressing water system upgrades will often hire AECOM to lead the design and management work.

How AECOM gets hired and what it does once on a project

Government agencies and private developers issue requests for proposals (RFPs) when they need design and engineering services. AECOM competes for these contracts by submitting a proposal that outlines its team, approach, timeline, and cost. Once hired, AECOM typically moves through several phases: initial planning and feasibility studies, detailed design, environmental review and permitting, construction oversight, and project closeout.

During the planning phase, AECOM gathers data, meets with stakeholders, and develops preliminary designs. During design, the firm creates detailed drawings, specifications, and cost estimates. For projects that affect the public — like a new transit line or a highway expansion — AECOM often manages the public engagement process, holding meetings and collecting feedback. The firm then works with regulatory agencies to obtain permits and environmental clearances.

Once construction begins, AECOM typically provides construction management services, meaning the firm monitors the contractor's work, ensures compliance with the design and regulations, and manages changes to the scope. AECOM does not build the project; a separate construction contractor does. AECOM's role is to oversee quality and keep the project on schedule and budget.

Finding information about a specific AECOM project

If you know a project is being managed by AECOM but need more information, start with the government agency or developer funding the work. A city's public works department, a state transportation agency, or a private developer's website will have project pages that list the design team — including AECOM — and provide contact information for questions.

AECOM's main website (aecom.com) has a project portfolio, but it is organized by region and sector rather than by location. Searching for your city or county name on AECOM's site may surface relevant projects, but the most direct route is usually the public agency managing the work. That agency will have a project manager, a public information contact, and often a dedicated project website with meeting schedules, design documents, and ways to submit comments.

For major infrastructure projects, AECOM publishes environmental impact statements, feasibility studies, and design reports. These documents are often available on the funding agency's website or through a public records request. Public meetings for projects are typically announced through the agency's website, local news, and direct mail to affected residents.

AECOM's role in public engagement and environmental review

When AECOM manages a project that affects the public, the firm is responsible for running the engagement process — but the final decisions rest with the government agency or developer. AECOM will hold public meetings, collect comments, and prepare environmental reviews, but it does not decide whether a project moves forward. That decision belongs to the city council, state agency, or private developer that hired the firm.

This distinction matters if you want to influence a project. Feedback given at an AECOM-run public meeting goes into the project record and is considered by the decision-maker, but AECOM itself is not the decision-maker. If you want to oppose or support a project, you need to engage with the government agency or developer, not just with AECOM.

AECOM is also responsible for preparing environmental documents required by law — such as environmental impact statements under the National Environmental Policy Act (NEPA) for federal projects, or state-level environmental review documents. These documents describe the project's potential effects and alternatives. Public comment periods are built into this process, and AECOM must respond to substantive comments before the project can move forward.

Common reasons you might interact with AECOM

You may encounter AECOM if you live near a major infrastructure project, own property affected by a proposed development, or work in a field that intersects with planning and design. Homeowners near a highway expansion, residents in a neighborhood with a proposed mixed-use development, or business owners affected by a transit project may all receive notices about AECOM-managed public meetings or comment periods.

If you are a professional — an architect, engineer, contractor, or government employee — you may work directly with AECOM teams on a project. If you are a student or job seeker, AECOM is a major employer in architecture, engineering, and environmental fields and regularly hires entry-level and experienced staff.

Consultants and smaller firms often subcontract with AECOM on large projects, so you may be part of an AECOM-led team without being directly employed by the firm. Understanding AECOM's role in the project hierarchy helps clarify reporting lines and decision-making authority.

How to contact AECOM about a specific project

AECOM's main phone line and website are useful for general inquiries, but for questions about a specific project, contact the government agency or developer managing the work. That entity will have a project manager who can direct you to the right AECOM team member or provide project documentation.

If you are trying to submit a comment on a project, look for a public comment period announced by the funding agency. Comments are typically submitted to the agency, not directly to AECOM, though AECOM may provide a comment form or email address during public meetings. Keep a record of when and how you submitted your comment, as this creates a paper trail if you need to follow up later.

For employment inquiries, AECOM's careers page (aecom.com/careers) lists open positions by location and discipline. For vendor or subcontractor inquiries, AECOM's procurement department handles those requests, and information is available through the main website.

Frequently Asked Questions

Does AECOM decide whether a project gets built?

No. AECOM designs and manages projects, but the government agency or developer that hired the firm makes the final decision about whether a project moves forward. AECOM's role is to provide planning, design, and engineering informed — not to approve or reject projects.

How do I learn about AECOM is working on a project near me?

Start with your city or county government website. Search for major infrastructure or development projects in your area, and check the project page for the design team. You can also contact your local public works or planning department directly and ask whether AECOM is involved in any current projects.

Can I submit comments about a project AECOM is managing?

Yes. AECOM typically runs public meetings and comment periods for projects that affect residents. Comments are usually submitted to the government agency or developer, not to AECOM directly. Look for a public comment important date on the project website or announcement, and submit your comments in writing to create a record.

Is AECOM a government agency?

No. AECOM is a private company that contracts with government agencies and private developers. It is not part of any government office, though it works closely with government clients and must follow all applicable regulations and public engagement requirements.

How long does an AECOM-managed project typically take?

Timeline varies widely depending on project size and complexity. A small building design might take one to two years from start to finish. A major infrastructure project like a transit system can take five to ten years or more from initial planning through construction completion. Check the specific project website for estimated timelines.