Environmental Risk Assessor

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DescriptionThe Environmental Risk Assessor will work with Leidos Project Managers and Senior Staff and interface with multiple Leidos offices. The Risk Assessor should be comfortable working in a team environment, and demonstrate excellent written and strong verbal communication, as well as organizational skills. Frequent collaboration with the project manager and project team members is expected. The successful candidate will be dedicated to working full-time in support of document preparations and will be an initiative-focused, goals-oriented individual, requiring some supervisory oversight to start.

This position is flexible regarding work location (on-site Leidos office locations in Reston, VA; Twinsburg, OH; or St. Louis, MO or remote location). Must be able to obtain access to, and conduct work on, U. S. Government installations. U. S. Citizenship or U. S. Permanent Resident status is required. The anticipated salary range for this role is between $85,000 and $100,000 annually. The ChallengeAssist 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 ApartBS 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 HaveUnderstanding 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 PostingJuly 2, 2025For 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 RangePay Range $72,150. 00 - $130,425. 00The Leidos pay range for this job level is a general guideline onlyand 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. #RemoteREQNUMBER: R-00162036All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.

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