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Senior Wastewater Engineer Jobs (NOW HIRING)

Hazen and Sawyer

Senior Wastewater Engineer

Manchester, NH · On-site

$104K - $142K/yr

Hazen and Sawyer is seeking a Senior Wastewater Engineer for our Manchester, NH office. As part of our Wastewater team qualified candidates will be involved with a wide range of wastewater ...

Hazen and Sawyer

Senior Wastewater Engineer

Boston, MA · On-site

$113K - $155K/yr

Hazen and Sawyer is seeking a Senior Wastewater Engineer for our Boston, MA office. As part of our Wastewater team qualified candidates will be involved with a wide range of wastewater infrastructure ...

Sehinc

Senior Wastewater Engineer

Rice Lake, WI

$110K - $125K/yr

You belong at SEH SEH is currenting searching for a Senior Wastewater Engineer to join our talented Water/Wastewater team! Why our employee-owners love SEH: * "I was on vacation last week and had ...

Sehinc

Senior Wastewater Engineer

Saint Paul, MN

$110K - $125K/yr

You belong at SEH SEH is currenting searching for a Senior Wastewater Engineer to join our talented Water/Wastewater team! Why our employee-owners love SEH: * "I was on vacation last week and had ...

Pennoni

Senior Wastewater Engineer

Philadelphia, PA · On-site

$99K - $137K/yr

We are looking for a Senior Engineer to help lead our water & wastewater projects on a full-time, direct basis; this person will be expected to focus on our wastewater treatment & conveyance projects.

Hazen and Sawyer

Senior Wastewater Engineer

Wethersfield, CT · On-site

$104K - $143K/yr

Hazen and Sawyer is seeking a Senior Wastewater Engineer for our Wethersfield, CT office. As part of our Wastewater team qualified candidates will be involved with a wide range of wastewater ...

Pennoni

Senior Wastewater Engineer

Philadelphia, PA · On-site

$99K - $137K/yr

We are looking for a Senior Engineer to help lead our water & wastewater projects on a full-time, direct basis; this person will be expected to focus on our wastewater treatment & conveyance projects.

Sehinc

Senior Wastewater Engineer

Chippewa Falls, WI

$110K - $125K/yr

You belong at SEH SEH is currenting searching for a Senior Wastewater Engineer to join our talented Water/Wastewater team! Why our employee-owners love SEH: * "I was on vacation last week and had ...

HDR

Senior Wastewater Engineer

Denver, CO · On-site

$107K - $147K/yr

In the role of Senior Engineer Sanitary, we'll count on you to: * Independently create detailed ... Serve as a project manager on water/wastewater projects as needed * Perform other duties as needed ...

Sehinc

Senior Wastewater Engineer

New Richmond, WI

$110K - $125K/yr

You belong at SEH SEH is currenting searching for a Senior Wastewater Engineer to join our talented Water/Wastewater team! Why our employee-owners love SEH: * "I was on vacation last week and had ...

HDR

Senior Wastewater Engineer

Denver, CO

$107K - $147K/yr

In the role of Senior Engineer Sanitary, we'll count on you to: * Independently create detailed ... Serve as a project manager on water/wastewater projects as needed * Perform other duties as needed ...

HDR

Senior Wastewater Engineer (PE)

Boise, ID

$99K - $136K/yr

In the role of Senior Wastewater Engineer, we'll count on you to: * Independently create detailed designs, plans, specifications and estimates for pipelines, pump stations, treatment plants, tanks ...

Carollo Engineers Inc.

Senior Wastewater Engineer

Portland, OR · On-site

$110K - $152K/yr

Carollo Engineers is a leading engineering firm dedicated exclusively to water. For over 90 years, we've specialized in the planning, design, and construction of water, wastewater, stormwater, and ...

HDR

Senior Wastewater Engineer (PE)

Boise, ID · On-site

$99K - $136K/yr

In the role of Senior Wastewater Engineer, we'll count on you to: * Independently create detailed designs, plans, specifications and estimates for pipelines, pump stations, treatment plants, tanks ...

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Senior Wastewater Engineer information

See salary details

$59.5K

$126.6K

$183.5K

How much do senior wastewater engineer jobs pay per year?

As of Jul 18, 2026, the average yearly pay for senior wastewater engineer in the United States is $126,557.00, according to ZipRecruiter salary data. Most workers in this role earn between $104,500.00 and $143,500.00 per year, depending on experience, location, and employer.

What are some common challenges a Senior Wastewater Engineer faces when managing large-scale projects?

Senior Wastewater Engineers often encounter challenges such as coordinating multidisciplinary teams, addressing regulatory compliance issues, and balancing project budgets and timelines. Navigating complex permitting processes and ensuring designs meet evolving environmental standards requires strong technical and communication skills. Additionally, managing stakeholder expectations—including clients, government agencies, and the public—can be demanding but is essential for project success.

What is the difference between Senior Wastewater Engineer vs Wastewater Project Engineer?

AspectSenior Wastewater EngineerWastewater Project Engineer
Required CredentialsBachelor's degree in Civil or Environmental Engineering; Professional Engineer (PE) license often preferredBachelor's degree in Civil or Environmental Engineering; PE license may be preferred but less common
Work EnvironmentDesign, planning, and oversight of wastewater systems; leadership roles in projectsAssists in project execution, technical support, and coordination on wastewater projects
Employer & Industry UsageConsulting firms, municipal agencies, environmental firmsEngineering firms, construction companies, municipal departments

The main difference between a Senior Wastewater Engineer and a Wastewater Project Engineer lies in experience, responsibilities, and leadership. Senior Wastewater Engineers typically have more experience, hold a PE license, and oversee entire projects or teams. Wastewater Project Engineers focus on supporting project tasks and technical execution. Both roles are essential in wastewater industry projects, but the senior position involves greater oversight and strategic planning.

What are the key skills and qualifications needed to thrive as a Senior Wastewater Engineer, and why are they important?

To thrive as a Senior Wastewater Engineer, you need a strong background in civil or environmental engineering, thorough knowledge of wastewater treatment processes, and typically a Professional Engineer (PE) license. Familiarity with design software like AutoCAD, hydraulic modeling tools, and regulatory compliance systems is crucial. Outstanding project management, leadership, and communication skills distinguish top performers in this role. These skills ensure effective design, implementation, and oversight of complex projects that protect public health and the environment.

What does a Senior Wastewater Engineer do?

A Senior Wastewater Engineer is responsible for designing, planning, and overseeing projects related to the treatment and disposal of wastewater. They ensure that systems comply with environmental regulations and work efficiently to protect public health and the environment. Their duties often include project management, supervising junior engineers, conducting site inspections, and collaborating with stakeholders to develop sustainable solutions. Additionally, they may be involved in upgrading existing facilities and implementing innovative treatment technologies.
More about Senior Wastewater Engineer jobs
What cities are hiring for Senior Wastewater Engineer jobs? Cities with the most Senior Wastewater Engineer job openings:
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Senior Wastewater Engineer jobs near you
Infographic showing various Senior Wastewater Engineer job openings in the United States as of July 2026, with employment types broken down into 95% Full Time, 2% Part Time, and 3% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution, with an average salary of $126,557 per year, or $60.8 per hour.
Senior Wastewater Engineer

Senior Wastewater Engineer

Hazen and Sawyer

Manchester, NH • On-site

$104K - $142K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 16 days ago

Job description

Hazen and Sawyer is seeking a Senior Wastewater Engineer for our Manchester, NH office. As part of our Wastewater team qualified candidates will be involved with a wide range of wastewater infrastructure projects, focusing on treatment process design and construction.

Hazen and Sawyer is a stable, growing, employee-owned company where engineers and scientists are valued. We are committed to making the world a better place by providing technically superior solutions to our clients for all things water.


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 80+ offices throughout the United States, Latin America, Canada, and the UK.
  • A flexible hybrid work schedule supports today's busy professionals.

Key Responsibilities:

  • Position will include high level of client development and management, supported by our local offices and New York City Corporate Headquarters.

Required Qualifications:

  • Minimum of 10 years of experience (a minimum of 20 preferred)
  • Minimum professional qualifications are a BS degree in environmental, civil, or mechanical engineering
  • PE license
  • Excellent communication and interpersonal skills are essential.
  • Experience with project management or the desire to grow into a project management role

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
HAZEN AND SAWYER logo

About HAZEN AND SAWYER

Sourced by ZipRecruiter

Hazen and Sawyer, headquartered in New York, NY, US, operates within the field of environmental science and engineering. Founded in 1951, the firm specializes in designing drinking water, wastewater, and stormwater facilities, comprehensive solid waste services, and other environmental infrastructure projects. Striving towards nurturing clean, safe water supply, the company upholds it as its primary mission. Their dedication reflects in their numerous honors received at the national and regional levels, including awards from the American Society of Civil Engineers, American Council of Engineering Companies, and Water Environment Federation.

Industry

Environmental consulting services

Company size

501 - 1,000 Employees

Headquarters location

New York, NY, US

Year founded

1951

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