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$41K

$115.4K

$214K

How much do freelance risk assessment toxicologist jobs pay per year?

As of Aug 15, 2026, the average yearly pay for freelance risk assessment toxicologist in the United States is $115,369.00, according to ZipRecruiter salary data. Most workers in this role earn between $84,000.00 and $135,500.00 per year, depending on experience, location, and employer.

What is the difference between Freelance Risk Assessment Toxicologist vs Contract Toxicologist?

AspectFreelance Risk Assessment ToxicologistContract Toxicologist
CredentialsTypically requires certifications in toxicology, risk assessment, and relevant degreesSimilar credentials, often with additional industry-specific licenses
Work EnvironmentIndependent, project-based, often remote or client-siteTemporary employment at a company or lab, often on-site
Employer & Industry UsageUsed by consulting firms, freelance platforms, and clients needing specialized risk assessmentsEmployed by pharmaceutical, chemical, or environmental companies on a contractual basis

Both roles require similar toxicology expertise and certifications. The main difference lies in the work setup: Freelance Risk Assessment Toxicologists operate independently on a project basis, while Contract Toxicologists are hired temporarily by organizations. Your choice depends on your preferred work environment and career goals.

What are the key skills and qualifications needed to thrive as a freelance risk assessment toxicologist, and why are they important?

To thrive as a Freelance Risk Assessment Toxicologist, you need a solid background in toxicology, risk assessment methodologies, and regulatory guidelines, typically supported by an advanced degree in toxicology or a related field. Familiarity with tools like risk assessment software, statistical analysis programs, and knowledge of regulatory databases (e.g., EPA, REACH) is essential. Strong analytical thinking, attention to detail, and clear communication skills help convey complex findings to clients and stakeholders. These skills ensure accurate risk evaluations, compliance with regulations, and effective client collaboration in a specialized consulting environment.

What are some common challenges freelance risk assessment toxicologists face when managing multiple projects for different clients?

Freelance risk assessment toxicologists often juggle several projects at once, each with unique timelines, data requirements, and regulatory standards. One of the main challenges is ensuring rigorous data quality and consistency while adapting to various client expectations and communication styles. Time management and prioritization skills are crucial, as is staying up-to-date with the latest scientific research and regulatory changes. Building strong client relationships and maintaining clear documentation can help mitigate misunderstandings and streamline project delivery.

What does a freelance risk assessment toxicologist do?

A Freelance Risk Assessment Toxicologist evaluates the potential health risks posed by chemicals, pharmaceuticals, consumer products, or environmental exposures. They analyze scientific data to determine safe exposure levels and make recommendations to minimize harm to humans or the environment. As freelancers, they may work independently for various clients, such as regulatory agencies, corporations, or consulting firms, providing expert reports and guidance on toxicological risks.
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Freelance Risk Assessment Toxicologist jobs near you
Infographic showing various Freelance Risk Assessment Toxicologist job openings in the United States as of August 2026, with employment types broken down into 76% Full Time, 6% Part Time, 3% Temporary, 12% Contract, and 3% Nights. Highlights an 97% In-person, and 3% Remote job distribution, with an average salary of $115,369 per year, or $55.5 per hour.

Human Health Risk Assessor - 6 years minimum experience

AECOM

Los Angeles, CA • On-site, Remote

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 15 hours ago

AECOM rating

8.1

Company rating: 8.1 out of 10

Based on 68 frontline employees who took The Breakroom Quiz

15th of 80 rated construction

Job description

Company Description
Work with Us. Change the World.
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.
Job Description
AECOM is seeking an experienced and motivated full-time Human Health Risk Assessor to become an integrated member of AECOM's risk assessment and remediation practices. The location of this position is flexible and may be either in-office or remote.
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 and reviewing ecological 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.
  • Contributing to proposals and business development, including developing scopes of work and cost estimates for ecological risk assessment.
  • Mentoring/developing more junior staff.
  • Maintaining knowledge of federal and state regulations/guidance documents for conducting risk assessments.
  • Maintaining work quality, quantity, and efficiency at or above company standards.
  • Must be willing to perform occasional field work, as needed.

Qualifications
Minimum Qualifications:
  • BA/BS degree in Ecotoxicology, Ecology, Zoology, Environmental Science/Studies, Chemistry, Toxicology, Biology or other related area AND 6+ years of experience performing ecological risk assessments in an environmental consulting setting, or demonstrated equivalence of education and experience.
  • Due to the nature of work, US Citizenship is required.
  • Valid Driver's License and as a condition of employment must be able to pass AECOM's Motor Vehicle Records review and background check.

Preferred Qualifications:
  • Master's or PhD degree in Ecotoxicology, Ecology, Zoology, Environmental Science/Studies, Chemistry, Toxicology, Biology, Zoology, or other related area.
  • Applied knowledge of USEPA guidance for conducting ecological risk assessment.
  • Excellent technical writing and communication skills.
  • Experience conducting food web/bioaccumulation assessments.
  • Experience performing data analysis and applied statistics.
  • Excellent technical writing and communication skills.
  • Proficiency in Microsoft Excel and Word.
  • Experience evaluating PFAS, PCBs, and lead.
  • CERCLA experience with Remedial Investigations, Feasibility Studies, and ROD development.
  • Site investigation and field sampling and wildlife assessment experience.
  • Experience working on Navy or Department of Defense.
  • Experience dealing with the Hawaii Department of Health and EPA Region 9
  • Experience working with projects in Hawaii, Guam and other Pacific Islands
  • Preferred work location Hawaii.
  • Experience performing wildlife assessments.

Additional Information
  • THIS POSTING IS FOR A CURRENT VACANCY, AND AECOM INTENDS TO FILL THIS POSITION BY SEPTEMBER 6TH, 2026.

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.

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