Human Health Risk Assessment Scientist

Overview

The experienced Risk Assessment Scientist will work with Leidos Project Managers and Senior Staff, interface with multiple Leidos offices, and support full‑time document preparation. The candidate should be comfortable in a team environment, demonstrate excellent written and verbal communication, and possess strong organizational skills.

Flexible regarding work location: on‑site Leidos offices in Reston, VA;
Twinsburg, OH; or St. Louis, MO, or a remote location. Willing to travel periodically to Leidos offices and/or project locations.

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 salary range for this role is anticipated to be between $85,000 and $120,000 annually.

• Take the lead and assist in conducting human health risk assessments, 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.
• Author risk‑related sections of technical reports, including work plans/sampling plans, human health risk assessments, remedial investigation (RI) reports, feasibility studies (FS), proposed plans (PP), and records of decision (ROD).
• May assist in conducting ecological risk assessments.
• Provide technical support in evaluating and interpreting quantitative and qualitative environmental sampling data acquired during site investigations.
• Willing and able to work on a variety of risk assessment— and non‑risk assessment‑related tasks.

• BS or MS degree in Environmental Sciences, Earth Sciences, Biological Sciences, Chemistry, Toxicology, Ecology, or related field with 4+ (BS) or 2+ years (MS) of professional experience in performing human health risk assessments of exposures to chemicals in environmental media.
• Strong working knowledge of EPA human health risk assessment guidance and methods within the framework of the CERCLA RI/FS/PP/ROD process.
• Experience calculating human health cancer/noncancer risks and risk‑based screening levels using spreadsheets and online calculators.
• Authors human health risk‑related text including methodology, reporting, and interpretation of calculated risks.
• Ability to compile, manage, and interpret environmental investigation and monitoring data for organic and inorganic chemical parameters.
• Working knowledge of environmental statistical methods (e.g., calculation of UCLs, trend analysis) and experience with statistical software tools (e.g., EPA ProUCL, SAS, etc.).
• Understanding of data validation qualifiers indicating usability.
• Some experience working with federal environmental regulators.
• Proficiency in MS Office tools (Excel, Word, Outlook, PowerPoint).

• Knowledge and experience with data and/or risk analyses of per- and polyfluoroalkyl substances (PFAS).
• Experience working with radiological data, as well as human health radiological risk and dose assessments in accordance with the EPA, DOE, and NRC regulatory framework.
• Working knowledge of EPA ecological risk assessment guidance and professional experience in conducting ecological risk assessments.
• RCRA and CERCLA process documents knowledge (Corrective Action Plans/Reports; RI/FS/PP/ROD).
• Professional experience working on federal contracts is preferred.
• Professional experience working with state regulators.
• Doctoral degree with professional experience conducting human health risk assessments.

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.