Principal Wastewater Engineer

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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.

• 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…