Senior Wastewater Process Engineer — Lead Design

WSP USA; London; On-site; CAD 148,000 - 198,000; Full time

Benefits offered by this job

Top 100 Employer in Canada 2026

Flexible work culture

Global community of brilliant minds

Job summary

WSP in Canada is seeking a Senior Process Engineer – Wastewater Treatment to lead planning, design, commissioning, and optimization of municipal treatment facilities.

You will apply process engineering fundamentals with practical operational knowledge, guide multidisciplinary teams, review P&IDs, and mentor junior staff.

This role offers opportunities to influence projects across municipalities and travel to client sites.

Qualifications

• Bachelor’s degree in Chemical, Environmental, Mechanical, or related engineering.
• 10+ years of progressive water or wastewater process engineering experience.
• Professional Engineer designation.
• Experience in process design, modelling, optimization, equipment evaluation, and equipment selection.
• Strong knowledge of process controls, instrumentation, plant operations, permitting, contract administration, and construction-support services.
• Proven ability to independently lead technical work, complex proposals, and multidisciplinary project teams in a consulting environment.
• Strong technical writing, presentation, client communication, proposal-development, and problem-solving skills.
• A valid driver’s licence and willingness to travel periodically to client sites and project locations.

Responsibilities

• Lead process design, capacity assessments, facility optimization, and treatment-alternative evaluations for municipal wastewater infrastructure.
• Develop design criteria, mass balances, process calculations, hydraulic assessments, and equipment sizing to support informed technical and investment decisions.
• Design biological, physical and chemical, nutrient-removal, tertiary-treatment, and solids-processing systems that respond to clients’ operational and regulatory needs.
• Apply and review process models using tools such as GPS-X, BioWin, SUMO, and Visual Hydraulics to assess alternatives, troubleshoot complex issues, and optimize treatment performance.
• Review process flow diagrams, P&IDs, calculations, specifications, equipment selections, and technical reports to uphold quality and consistency across project deliverables.
• Lead technical workshops and clearly communicate recommendations to clients, operators, vendors, and multidisciplinary design teams.
• Guide permitting, contract administration, commissioning, and construction-support activities throughout the project lifecycle.
• Strengthen our technical community by providing QA/QC, mentoring junior and intermediate engineers, leading proposals, and supporting trusted client relationships.

Skills

Process design leadership

Mass balances

Hydraulic assessments

Equipment sizing

Process modelling tools

QA/QC mentoring

Technical writing

Professional Engineer

Travel willingness

Education

Bachelor's degree in Chemical, Environmental, Mechanical

Master's or Doctoral degree asset

Tools

GPS-X

BioWin

SUMO

Visual Hydraulics

Job description

WSP in Canada is seeking a Senior Process Engineer – Wastewater Treatment to lead planning, design, commissioning, and optimization of municipal treatment facilities.

You will apply process engineering fundamentals with practical operational knowledge, guide multidisciplinary teams, review P&IDs, and mentor junior staff.

This role offers opportunities to influence projects across municipalities and travel to client sites.