Environmental Risk Assessor

Sorry, this job was removed at 12:16 a.m. (CST) on Tuesday, Jul 08, 2025
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4 Locations
In-Office or Remote
72K-130K Annually
Information Technology • Software
The Role

The 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 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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The Company
Alexandria, VA
27,104 Employees
Year Founded: 1969

What We Do

We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.

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