**Our Business** We are a global leader in environmental consulting - made stronger with the recent acquisition of Wood’s Environment & Infrastructure business and Golder - with world-class expertise in environmental, social and governance (ESG), climate resiliency & sustainability (CRS), and earth sciences. Combined we have over 20,000 multidisciplinary professionals worldwide collaborating daily to protect and conserve natural landscapes, create firm foundations for communities to stand on, and champion sustainable development to combat climate change. As part of the team, you will have access to an unparalleled network of resources and endless opportunities to collaborate on exciting projects with diverse teammates from across the globe. **Your Impact** WSP is seeking an Ecological and Human Health Risk Assessor with three to five years of experience for our Chelmsford, Massachusetts office. We are seeking a motivated candidate who is willing to learn to join our current team of risk assessment professionals in executing risk assessments as well as project planning and closure. Risk assessments will be prepared to meet the requirements of the United States Environmental Protection Agency, the Massachusetts Department of Environmental Protection, and many other states’ environmental regulatory programs. The ideal candidate would be located in the Chelmsford area primarily working with our senior ecological risk assessor while being part of the human health risk assessment team and also being part of projects across the company. You will have the opportunity to learn both ecological and human health risk assessment while focusing primarily on ecological risk assessment. WSP offers the opportunity and flexibility to balance work in the office and from home with a three day ‘in person’ policy. **Key Responsibilities** This position will involve the implementation of project work associated with multimedia (air, water, soil, sediment, and biota) risk assessments. The selected candidate will contribute to the preparation of risk assessment reports as a member of project-specific risk assessment teams. This position offers the opportunity to learn from and grow with an established risk practice and to address complex environmental challenges by executing the following roles/responsibilities: + Extensively use Microsoft Excel to analyze chemical data and calculate ecological and human exposure risk. + Learn and use standard risk assessment spreadsheet tools. + Learn and understand regulatory and technical requirements for conducting risk assessments under specific regulatory programs. + Document in written text risk assessment activities that have been completed, including data evaluation. selection of chemicals of potential ecological concern, exposure assessment, toxicity assessment, and calculations of cancer risk and noncancer hazard. + Conduct quality assurance/quality control activities for work products prepared by colleagues. + Conduct work activities within identified budget and schedule requirements. + Contribute to the preparation of proposals to win new work for small and large projects that include a risk assessment component. + May contribute to technical presentations or papers for publication. **Who You Are** Qualifications and Experience: + B.S. or M.S. in Ecology, Biology, Environmental Science, or related scientific discipline + 3-5 years of relevant experience in risk assessment + Knowledge of risk assessment principles, procedures, and guidance particularly USEPA CERCLA and Massachusetts Contingency Plan (MCP) + Strong technical writing skills + Ability to communicate effectively, both verbally and in writing, listen and engage, including communicating technical information effectively + Familiarity using Microsoft Excel for the presentation of data, calculations, and data evaluation + Troubleshooting and problem-solving skills + Knowledge of the principles and standards of scientific study + Ability to work effectively with team members as well as independently + Must be well organized, able to manage and prioritize several assignments at one time, and deliver on time and within budget + Able to work in the field to collect samples Preferred Qualifications and Experience: + Experience with risk assessment-specific tasks (presentation of analytical data and dose-response data, selection of chemicals of potential concern, calculation of exposure point concentrations (Excel and ProUCL), and calculation of cancer risk and Hazard Index) is desirable + Experience with metals, polycyclic aromatic hydrocarbons, and per- and polyfluoroalkyl substances is desirable Our employees have the opportunity to work on diverse projects with the support and resources of a large international organization with unlimited career opportunities. At the same time, the Chelmsford office takes pride in maintaining a close collaborative environment. We have a very comfortable and supportive culture, with a deep bench of knowledgeable and skilled geologists, scientists, engineers, chemists, and database specialists. This job opening provides you an opportunity to progress while working in an established environmental consulting firm that values its employee’s enthusiasm and technical contributions. We encourage you to apply for this opportunity. \#LI-SS2 **About WSP** WSP USA is the U.S. operating company of WSP, one of the world's leading engineering and professional services firms. Dedicated to serving local communities, we are engineers, planners, technical experts, strategic advisors and construction management professionals. WSP USA designs lasting solutions in the buildings, transportation, energy, water and environment markets. With more than 15,000 employees in over 300 offices across the U.S., we partner with our clients to help communities prosper. www.wsp.com WSP provides a flexible and agile workplace model while meeting client needs. Employees are also afforded a comprehensive suite of benefits including medical, dental, vision, disability, life, and retirement savings focused on providing health and financial stability throughout the employee’s career. At WSP, we want to give our employees the challenges they seek to grow their careers and knowledge base. Your daily contributions to your team will be essential in meeting client objectives, goals and challenges. Are you ready to get started? WSP USA (and all of its U.S. companies) is an Equal Opportunity Employer Race/Age/Color/Religion/Sex/Sexual Orientation/Gender Identity/National Origin/Disability or Protected Veteran Status. The selected candidate must be authorized to work in the United States. **NOTICE TO THIRD PARTY AGENCIES:** WSP does not accept unsolicited resumes from recruiters, employment agencies, or other staffing services. Unsolicited resumes include any resume or hiring document sent to WSP in the absence of a signed Service Agreement where WSP has expressly requested recruitment/staffing services specific to the position at hand. Any unsolicited resumes, including those submitted to hiring managers or other business leaders, will become the property of WSP and WSP will have the right to hire that candidate without reservation – no fee or other compensation will be owed or paid to the recruiter, employment agency, or other staffing service.