Mott MacDonald · 2 hours ago
Principal Project Manager - Water/ Wastewater
Seattle, WA
Full-time
Hybrid
Lead/Staff
$181K/yr - $221K/yr
15+ years expMott MacDonald is a global engineering, management, and development services company, and they are seeking a highly motivated and experienced Principal Engineer (Design Manager) to lead wastewater conveyance programs. This role involves providing strategic and technical leadership on complex projects while collaborating with a talented team to deliver sustainable solutions in the Puget Sound region.
ConsultingDeveloper PlatformProfessional ServicesSoftware
Responsibilities
Serve as Technical Principal/Design Manager for large CSO tunnels, gravity/pressure conveyance, pump stations, and related assets from planning through construction support
Establish project governance (scope, schedule, budget, risk, change control) and ensure safety‑in‑design and quality management (QA/QC) throughout delivery
Direct planning studies, alternatives analyses, feasibility assessments, and basis-of-design documentation
Oversee hydraulic modeling, surge/transient analyses, and capacity planning; guide trenchless technology selection and constructability
Lead preparation of drawings, specifications, technical reports, and cost estimates; support procurement and construction-phase engineering (RFIs, submittals, field support)
Act as Project Principal building and maintaining executive-level client relationships, supporting the development of account plans and program roadmaps
Champion BIM and model-based coordination; promote data-driven decision-making, carbon-aware design, and sustainability/resilience best practices
Mentor and develop multi-disciplinary teams; foster an inclusive, high‑performance culture; support recruitment and succession planning
Coordinate with tunneling, geotechnical, structural, and environmental specialists across offices; occasional regional travel as needed
Qualification
Required
Bachelor's degree in Civil, Environmental, or Water Resources Engineering (Master's preferred)
Professional Engineer (PE), Washington
15+ years in water/wastewater infrastructure with substantive experience delivering CSO and wastewater conveyance projects
Demonstrated success leading large, multi‑disciplinary teams across planning, design, procurement, and construction support
Proficiency in wastewater hydraulics, pump station design, trenchless methods and construction-phase engineering
Competence with scheduling, budgeting, risk management, change control, and quality systems
Strong written/oral communication; skilled in client-facing presentations and stakeholder engagement
Preferred
Prior work with Seattle-area agencies and counties, including Seattle Public Utilities (SPU), King County Wastewater Treatment Division (WTD), City of Tacoma Environmental Services, Pierce County Sewer Utility
Familiarity with Puget Sound regional standards, permitting, and delivery methods (progressive DB, CM/GC, DBB)
Experience addressing wet‑weather/consent decree drivers, system resilience, and environmental compliance
Working knowledge of BIM and common hydraulic modeling tools; commitment to digital delivery and sustainability practices
Benefits
401k
Medical
Dental and vision insurance
Short-term/long-term disability
Paid holidays
PTO
Parental leave
Company paid life insurance
Company
Mott MacDonald
Mott MacDonald focuses on digital innovation, transforming, engineering, management and development.
10001+ employees
Funding
Current Stage
Late StageLeadership Team
Cathy Travers
Group Managing Director
Paul Hilton
Regional Managing Director for Middle East, South Asia and international development
Recent News
2026-01-16
2026-01-16
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