Environmental Risk Assessor

Permanent Resident status is required.

The anticipated salary range for this role is between $85,000 and $100,000 annually.

The Challenge:

• Assist in conducting human health and/or ecological risk evaluations, including development of conceptual site models, selection of appropriate toxicity values, calculation of cancer risks and noncancer hazards, and analysis of uncertainties associated with the risk evaluations.

• Provide technical support in evaluating and interpreting quantitative and qualitative environmental sampling data acquired during site investigations.

• Support preparation of technical reports, including work plans/sampling plans, human health and/or ecological risk assessments, remedial investigation (RI) reports, feasibility studies (FS), proposed plans (PP), and records of decision (ROD).

• Willing and able to work on a variety of risk assessment- and non-risk assessment-related tasks.

• Willing and able to travel periodically to Leidos offices and/or project locations.

What Sets You Apart:

• BS degree in Environmental Sciences, Earth Sciences, Biological Sciences, Chemistry, Toxicology, Ecology, or related scientific field, with 5+ years of experience in the performance of human health and/or ecological risk assessments.

• Working knowledge of EPA human health and/or ecological risk assessment guidance and methods within the framework of the CERCLA RI/FS/PP/ROD process.

• Ability to compile, manage, and interpret environmental investigation and monitoring data for organic and inorganic chemical parameters.

• Some experience working with federal environmental regulators.

• Proficiency in MS Office tools (Excel, Word, Outlook, PowerPoint).

You May Also Have:

• Understanding of data validation qualifiers indicating usability.

• Environmental statistical methods knowledge (e.g., calculation of UCLs, trend analysis) and software tools (e.g., EPA ProUCL, SAS, etc.).

• Knowledge and experience with EPA online calculators for determining cancer risks, noncancer hazards, and screening levels/preliminary remediation goals.

• Knowledge and experience with data and/or risk analyses of per- and polyfluoroalkyl substances (PFAS).

• Experience working with radiological data is a plus.

• RCRA and CERCLA process documents knowledge (Corrective Action Plans/Reports; RI/FS/PP/ROD).

• Experience working on federal contracts is preferred.

• Experience working with state regulators is desired, but not necessary.

Original Posting:
July 2, 2025
For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:
Pay Range $72,150.00 - $130,425.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

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