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Job Description:
Parsons is seeking a highly capable Senior Wastewater Engineer to join our Water and Wastewater team. This position will provide technical leadership and process engineering expertise for municipal, industrial, manufacturing, groundwater, leachate, and advanced water treatment projects throughout the United States, Canada, and potentially international locations.
The successful candidate will support projects from feasibility evaluations and treatment process development through detailed design, procurement, construction, commissioning, startup, and operational troubleshooting. The role requires strong technical knowledge, excellent communication skills, sound engineering judgment, and the ability to work effectively with clients, vendors, constructors, and multidisciplinary project teams.
What You’ll Be Doing
Lead and perform process engineering activities for municipal, industrial, manufacturing, groundwater, leachate, and advanced water and wastewater treatment projects.
Develop and evaluate treatment solutions for conventional and emerging contaminants, including PFAS.
Apply wastewater treatment principles, process selection criteria, hydraulic fundamentals, equipment selection practices, and treatment system integration requirements.
Lead or support feasibility studies, alternatives evaluations, white papers, treatability studies, and process development activities, including:
Bench- and pilot-scale testing
Laboratory testing and data interpretation
Biological and physical-chemical treatment evaluations
Emerging contaminant assessments
Design and evaluate treatment systems incorporating technologies such as:
Headworks and preliminary treatment
Primary and secondary clarification
Biological treatment, aeration, and advanced biological processes
Membrane bioreactors and other membrane processes
Ozone, ultraviolet, and disinfection systems
Reverse osmosis and high-purity water treatment
Anaerobic digestion and biogas cogeneration
Solids handling and dewatering
Groundwater, soil, and leachate treatment
Prepare and review process design calculations, design reports, technical memoranda, process flow diagrams, piping and instrumentation diagrams, equipment specifications, technical specifications, and construction documents.
Prepare equipment requisitions, material takeoffs, cost estimates, scopes of work, and vendor or subcontractor requirements.
Lead or support the design of wastewater treatment facilities, lagoons, wet utilities, conveyance systems, and related municipal infrastructure.
Conduct field investigations, site assessments, process evaluations, and data collection to develop reliable design information and support troubleshooting.
Support equipment selection, procurement, vendor coordination, construction, commissioning, startup, and operations.
Review vendor submittals, contractor shop drawings, equipment documentation, and other technical deliverables.
Observe and evaluate treatment system installation and confirm that construction aligns with design intent.
Coordinate with civil, mechanical, electrical, structural, environmental, instrumentation and controls, CAD, BIM, and other technical disciplines.
Work effectively with vendors, contractors, constructors, and design-build partners.
Provide technical direction and mentoring to engineers, designers, and other project team members.
Manage or support small- to medium-sized projects, tasks, and technical work packages.
Represent Parsons in client meetings, presentations, interviews, proposal activities, and other business development efforts.
Communicate technical recommendations, project goals, risks, costs, schedules, and results to clients, senior management, and internal stakeholders.
Anticipate technical, schedule, cost, safety, and constructability issues and develop practical solutions.
Support process safety activities, including HAZOP and PHA studies, and help ensure compliance with applicable health and safety requirements.
Travel to client offices, project sites, laboratories, equipment suppliers, and construction locations as required. International travel may be available for qualified and interested candidates.
Perform other responsibilities associated with this position as appropriate.
Preferred Qualifications
Bachelor's Degree in Engineering (or related field)
Master’s degree in Water/Wastewater Engineering, Environmental Engineering, Chemical Engineering, or a related discipline preferred
At least 10 years of progressively responsible experience in the design, evaluation, construction, commissioning, or operation of water and wastewater treatment systems, industrial facilities, or similar infrastructure.
Professional Engineer licensure, such as a PE or applicable provincial engineering designation. Candidates licensed in another jurisdiction may be considered if they are able to obtain local licensure through reciprocity or mobility requirements.
Demonstrated experience with industrial, municipal, manufacturing, groundwater, leachate, or advanced water and wastewater treatment projects.
Experience with wastewater treatment lagoons, municipal wet utility infrastructure, treatment facility design, and conveyance systems.
Experience with bench-scale, pilot-scale, or full-scale treatability studies, including laboratory testing and interpretation of results.
Familiarity with laboratory procedures such as TSS, COD, pH, ion-selective electrode testing, and preparation of standard solutions.
Strong knowledge of wastewater treatment processes, hydraulic principles, process design, equipment selection, applicable codes and standards, regulatory requirements, and treatment system operation.
Experience preparing or reviewing engineering calculations, technical reports, specifications, design drawings, procurement documents, and construction deliverables.
Experience with construction support, commissioning, startup, operational troubleshooting, and field investigations.
Ability to provide technical leadership and serve as a project lead, process lead, or technical work package lead.
Experience working with multidisciplinary teams, clients, vendors, contractors, and design-build partners.
Understanding of process safety concepts and experience supporting HAZOP and PHA studies.
Experience with client development, proposal preparation, interviews, and technical presentations.
Excellent written, verbal, presentation, and interpersonal communication skills.
Proficiency with Microsoft Office applications.
Ability and willingness to travel as required by project and business needs.
Experience with relevant engineering and design software, such as:
AutoCAD, Civil 3D, Revit, Navisworks, BIM, or related platforms
BioWin or similar biological treatment modeling software
Pipe-Flo, WaterCAD, WaterGEMS, Visual Hydraulics, OpenUtilities, or similar hydraulic tools
Chemical equilibrium software, Aspen HYSYS, or comparable engineering applications
Key Competencies
Wastewater and advanced water treatment process design
Industrial, municipal, and emerging contaminant treatment
Treatability testing and process development
Engineering judgment and technical problem-solving
Technical leadership, mentoring, and quality review
Client, stakeholder, vendor, and contractor communication
Multidisciplinary coordination
Design-build, construction, commissioning, and startup support
Project, task, and technical work package management
Process safety and health and safety awareness
Security Clearance Requirement:
NoneThis position is part of our Critical Infrastructure team.For more than 80 years, our experts have designed and delivered the critical infrastructure that connects and protects communities around the world. We work in collaborative teams, both within the company and with our partners and customers, to plan, design, build, and modernize infrastructure. We take special pride in projects and solutions that improve communities as well as people’s quality of life by promoting economic growth, enhancing mobility, and increasing sustainability and resiliency. Powered by our people, we provide the imagination necessary to support our customers’ visions—and to help them see what's next!Salary Range: $103,500.00 - $181,100.00We value our employees and want our employees to take care of their overall wellbeing, which is why we offer best-in-class benefits such as medical, dental, vision, paid time off, Employee Stock Ownership Plan (ESOP), 401(k), life insurance, flexible work schedules, and holidays to fit your busy lifestyle!This position will be posted for a minimum of 3 days and will continue to be posted for an average of 30 days until a qualified applicant is selected or the position has been cancelled.Parsons is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, veteran status or any other protected status.We truly invest and care about our employee’s wellbeing and provide endless growth opportunities as the sky is the limit, so aim for the stars! Imagine next and join the Parsons quest—APPLY TODAY!Parsons is aware of fraudulent recruitment practices. To learn more about recruitment fraud and how to report it, please refer to https://www.parsons.com/fraudulent-recruitment/.
Skills Required
- Bachelor's degree in engineering or a related field
- Master's degree in Water/Wastewater Engineering, Environmental Engineering, Chemical Engineering, or a related discipline
- At least 10 years of progressively responsible experience in water and wastewater treatment systems, industrial facilities, or similar infrastructure
- Professional Engineer licensure, such as PE or an applicable provincial engineering designation, or ability to obtain local licensure through reciprocity or mobility
- Experience with industrial, municipal, manufacturing, groundwater, leachate, or advanced water and wastewater treatment projects
- Experience with wastewater treatment lagoons, municipal wet utility infrastructure, treatment facility design, and conveyance systems
- Experience with bench-scale, pilot-scale, or full-scale treatability studies, laboratory testing, and interpretation of results
- Familiarity with TSS, COD, pH, ion-selective electrode testing, and preparation of standard solutions
- Strong knowledge of wastewater treatment processes, hydraulic principles, process design, equipment selection, applicable codes and standards, regulatory requirements, and treatment system operation
- Experience preparing or reviewing engineering calculations, technical reports, specifications, design drawings, procurement documents, and construction deliverables
- Experience with construction support, commissioning, startup, operational troubleshooting, and field investigations
- Ability to provide technical leadership as a project lead, process lead, or technical work-package lead
- Experience working with multidisciplinary teams, clients, vendors, contractors, and design-build partners
- Understanding of process safety concepts and experience supporting HAZOP and PHA studies
- Experience with client development, proposal preparation, interviews, and technical presentations
- Excellent written, verbal, presentation, and interpersonal communication skills
- Proficiency with Microsoft Office applications
- Ability and willingness to travel as required by project and business needs
- Experience with relevant engineering and design software, including AutoCAD, Civil 3D, Revit, Navisworks, BIM, BioWin, hydraulic tools, or comparable applications
Parsons Corporation Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Parsons Corporation and has not been reviewed or approved by Parsons Corporation.
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Retirement Support — Retirement programs are framed as a major value driver, with an ESOP alongside a 401(k) match and additional stock-purchase options contributing meaningfully to total rewards. This structure is positioned as especially attractive for employees who value long-term wealth-building over immediate cash.
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Healthcare Strength — Health coverage is described as broad and choice-rich, with multiple plan types (PPO, HDHP, and some HMO networks) plus dental, vision, EAP, and wellness resources. The availability of different plan designs and national-carrier coverage supports varied employee needs.
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Leave & Time Off Breadth — Time-off offerings are portrayed as competitive, including PTO, holidays, flexible schedules such as a 9/80 option for eligible roles, and floating holidays in the U.S. Paid parental leave of 160 hours is also highlighted as a meaningful component of the overall package.
Parsons Corporation Insights
What We Do
Parsons is a digitally enabled solutions provider with a focus on making the world safer, smarter, healthier, more sustainable, and more connected. Founded in 1944, Parsons primarily serves the defense, security, and infrastructure markets. Uniquely qualified to deliver cyber/converged security, technology-based intellectual property, and other innovative services, the corporation delivers state-of-the-art solutions to federal, regional, and local government agencies as well as to private industrial customers worldwide. Parsons has a reputation for inclusion and diversity and has been named to the Ethisphere Institute’s list of World’s Most Ethical Companies for 10 consecutive years. Parsons facilitates a culture of innovation by encouraging collaboration among its employees and providing opportunities for career growth. With offices around the globe, people of varied talents and backgrounds, and a wide range of exciting projects, the possibilities at Parsons are endless. For more about Parsons, visit www.parsons.com. Mission: Delivering innovative infrastructure, defense, and security solutions to enable a more sustainable, safer, smarter, and more connected world.
