Demo

Senior Wastewater Project Engineer/Manager

Hazen and Sawyer
Seattle, WA Full Time
POSTED ON 6/15/2026
AVAILABLE BEFORE 8/14/2026

Hazen and Sawyer is seeking a Senior Wastewater Project Engineer/Manager for our Seattle office. As part of our design and process teams, you will be involved with a wide range of wastewater infrastructure projects. This will encompass all phases of design, including conceptual/feasibility evaluations, project management, preparation of design reports, permitting, development of construction drawings and specifications, and support of construction services. 

Why Hazen and Sawyer: 

  • Founded in 1951 by the son of Allen Hazen (developer of the Hazen-Williams equation), we are an employee-owned company with a singular focus on "all things water."
  • Our work includes planning, design, and oversight of construction of environmental infrastructure – for water, wastewater, and stormwater management.
  • We foster a work environment low on bureaucracy and high in creativity.
  • We recruit talented professionals, provide them with challenging, interesting, and creative assignments, and furnish them with the tools they need to succeed.
  • We currently have over 2,000 employees in 70 offices throughout the United States, Latin America, Canada, and the UK.

Key Responsibilities: 

  • Hazen has outstanding opportunities for motivated, talented people that enjoy teamwork and collaboration, client service, and solving our clients’ most difficult water challenges.
  • As a detail-oriented Senior Wastewater Engineer / Project Manager with a minimum of 15 years of experience in design and project management of municipal wastewater projects, you will apply your unique skills and insights as part of teams providing wastewater treatment and overall nutrient management solutions across Washington State and the Pacific Northwest Region. 
  • In your role you will evaluate, model, plan, design and support startup and operation of public sector wastewater treatment facilities. Your expertise in, and understanding of, wastewater treatment processes will guide the design of these important facilities. 
  • You will prepare facility assessment and design reports, review and direct junior staff in performing design calculations, process and/or hydraulic modeling, selection and sizing of equipment, preparing design documents and construction documents, and supporting construction phase services both in office and in the field. Field work and site visits from planning through construction may require occasional travel.
  • You will support and mentor junior engineers and will be supported by senior mentors on projects and local and regional office leadership. You will also lead business development activities including preparation of proposals and presentations. You will work with local and regional staff to grow the wastewater practice in the Pacific Northwest.

Required Experience:

The desired candidate will have experience in:

  • Serving as Project Manager, Design Manager and Project Engineer with full technical responsibility for planning, coordination, and execution of tasks for small and large projects
  • Multiple years following PE licensure of documented design experience for water/wastewater facilities projects
  • Planning, design and construction of wastewater treatment infrastructure including developing technical treatment strategies, selecting treatment processes, developing process design criteria, and delivering projects
  • Preparation of contract specifications and drawings
  • Development and review of technical reports, proposals, contract documents, resources studies, and data analysis
  • Office and field engineering support during construction 

Position Requirements:

  • Bachelor of Science degree in Environmental, Civil, Chemical or Mechanical Engineering
  • A minimum of 15 years of experience
  • PE required with ability to obtain registration in other States
  • Possess strong verbal communication and technical writing skills
  • Effectively and proactively coordinate with various disciplines

What We Offer: 

  • Comprehensive health benefits (medical, dental, vision, and prescription plans)
  • Pre-tax flexible spending plans for medical, dependent care, and transportation
  • Short and long-term disability, and employer paid life insurance
  • Paid holidays, floating holidays, and paid time off (PTO)
  • Employer-contributed 401(k) plan and additional financial planning support
  • Professional growth opportunities, including tuition reimbursement, in-house training, and incentives for professional registration and professional organization memberships
  • Starting pay range for this position depends on skills, experience, education and geographical location


 

Salary : $180,000 - $220,000

If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Senior Wastewater Project Engineer/Manager?

Sign up to receive alerts about other jobs on the Senior Wastewater Project Engineer/Manager career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$180,862 - $238,203
Income Estimation: 
$178,168 - $241,220
Employees: Get a Salary Increase
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Job openings at Hazen and Sawyer

  • Hazen and Sawyer Independence, OH
  • Work Setting: In-person (All in office/field) Hazen is seeking summer/fall intern for a variety of water-related assignments in our Cleveland office. The s... more
  • Just Posted

  • Hazen and Sawyer Independence, OH
  • Hazen and Sawyer is seeking an entry-level engineer for our Cleveland office. As part of our design and process teams, you will work on water and wastewate... more
  • Just Posted

  • Hazen and Sawyer Manchester, NH
  • Hazen and Sawyer is seeking an experienced Wastewater Project Engineer for our Manchester, NH office. As part of our wastewater team, this position will be... more
  • Just Posted

  • Hazen and Sawyer Silver, MD
  • Seeking Professional Licensed Engineer with 5 – 15 years of experience in the water industry. Background and experience in municipal or industrial water, w... more
  • Just Posted


Not the job you're looking for? Here are some other Senior Wastewater Project Engineer/Manager jobs in the Seattle, WA area that may be a better fit.

  • Water-Wastewater - Tetra Tech Careers Seattle, WA
  • The Opportunity: Tetra Tech is seeking a Civil Engineer, PE to join our Water team in Seattle, WA, supporting water and wastewater infrastructure projects ... more
  • Just Posted

  • Consor Engineers Seattle, WA
  • What Your Day Will Look Like: As a Senior Professional Engineer, you'll apply engineering principles and technical expertise to the design and analysis of ... more
  • 18 Days Ago

AI Assistant is available now!

Feel free to start your new journey!