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At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations.

There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.

We're one global team driven by our common purpose to deliver a better world. Join us.

AECOM is seeking an experienced and motivated full-time Human Health and/or Ecological Risk Assessor to become an integrated member of AECOM’s risk assessment and remediation practices. The candidate will work primarily with the Germantown, MD risk assessment team as well as assist other risk teams in the U.S. and globally. The candidate will perform both small- and large-scale risk assessments for federal and commercial/industrial clients in accordance with CERCLA, RCRA, and state level risk assessment guidance. The physical location of the position is negotiable. The employee will report to the Germantown, MD office; but may be full-time in office, full-time remote, or hybrid, depending on the candidate. The candidate is expected to begin immediately.

In this role, your responsibilities will include:

• Supporting a wide range of projects for private and government clients throughout the U.S. (and internationally).
• Performing human health risk assessments in accordance with regulatory guidance and project-specific work plans.
• Developing Risk Assessment Work Plans and contributing to Sampling and Analysis Plans/Quality Assurance Project Plans.
• Successfully coordinating with internal project teams, including delegating to junior staff.
• Preparing technical deliverables; including writing reports and performing/reviewing risk assessment calculations using R software.
• Maintaining knowledge of federal and state regulations/guidance documents for conducting risk assessments.
• Maintaining work quality, quantity, and efficiency at or above company standards.

Minimum Requirements:

• Bachelor’s degree plus four years of relevant experience or demonstrated equivalency of experience and/or education
• Valid Driver's license
• Due to the nature of work, US Citizenship is required.
• Successful candidate will have to pass a background and motor vehicle records check.  

Preferred Qualifications:

• Master’s degree in Environmental Science/Studies, Chemistry, Toxicology, Biology, Public Health, Environmental Health or other related area
• Experience evaluating PFAS, PCBs, and lead.
• Experience performing human health risk assessments in an environmental consulting setting.
• Experience with environmental statistics (e.g., USEPA ProUCL)
• Experience working on Department of Defense projects.
• Strong experience with running R software
• Applied knowledge of USEPA Risk Assessment Guidance for Superfund (RAGS).
• Experience conducting vapor intrusion assessments.
• Excellent technical writing and communication skills.
• Proficiency in Microsoft Excel and Word.

At AECOM, we are committed to maintaining a secure and trustworthy recruitment process and take any fraudulent hiring activity seriously. To support this commitment, all newly hired employees are required to attend an in-person Day 1 onboarding at an AECOM office location as a condition of employment.

About AECOM 

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan. 

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 2025. Learn more at aecom.com. 

What makes AECOM a great place to work 

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you’ll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you’ve always envisioned. Here, you’ll find a welcoming workplace built on respect, collaboration and community—where you have the freedom to grow in a world of opportunity. 

As an Equal Opportunity Employer, we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines.