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Freelance Water Design Engineer Jobs (NOW HIRING)

Water Design Engineer

Perrysburg, OH

$74K - $101K/yr

Step into Your New Role We are seeking a Water Design Engineer experience in designing, implementing, and managing decentralized water and wastewater treatment systems for commercial and industrial ...

Water Design Engineer

Perrysburg, OH · On-site

$74K - $101K/yr

Step into Your New Role We are seeking a Water Design Engineer experience in designing, implementing, and managing decentralized water and wastewater treatment systems for commercial and industrial ...

Water Design Engineer

Perrysburg, OH · On-site

$74K - $101K/yr

Step into Your New Role We are seeking a Water Design Engineer experience in designing, implementing, and managing decentralized water and wastewater treatment systems for commercial and industrial ...

Arcadis is the world's leading company delivering sustainable design, engineering, and consultancy ... As the Senior Water Design Manager, you will utilize your expertise and technical knowledge to ...

DESIGN ENGINEER WATER RESOURCES / SURFACE WATER SERVICE LINE POSITION SUMMARY Spicer Group is seeking a motivated Design Engineer to join our Water Resources / Surface Water Service Line. This ...

DESIGN ENGINEER WATER RESOURCES / SURFACE WATER SERVICE LINE POSITION SUMMARY Spicer Group is seeking a motivated Design Engineer to join our Water Resources / Surface Water Service Line. This ...

Arcadis is the world's leading company delivering sustainable design, engineering, and consultancy ... As the Senior Water Design Manager, you will utilize your expertise and technical knowledge to ...

DESIGN ENGINEER WATER RESOURCES / SURFACE WATER SERVICE LINE POSITION SUMMARY Spicer Group is seeking a motivated Design Engineer to join our Water Resources / Surface Water Service Line. This ...

DESIGN ENGINEER WATER RESOURCES / SURFACE WATER SERVICE LINE POSITION SUMMARY Spicer Group is seeking a motivated Design Engineer to join our Water Resources / Surface Water Service Line. This ...

DESIGN ENGINEER WATER RESOURCES / SURFACE WATER SERVICE LINE POSITION SUMMARY Spicer Group is seeking a motivated Design Engineer to join our Water Resources / Surface Water Service Line. This ...

DESIGN ENGINEER WATER RESOURCES / SURFACE WATER SERVICE LINE POSITION SUMMARY Spicer Group is seeking a motivated Design Engineer to join our Water Resources / Surface Water Service Line. This ...

DESIGN ENGINEER WATER RESOURCES / SURFACE WATER SERVICE LINE POSITION SUMMARY Spicer Group is seeking a motivated Design Engineer to join our Water Resources / Surface Water Service Line. This ...

DESIGN ENGINEER WATER RESOURCES / SURFACE WATER SERVICE LINE POSITION SUMMARY Spicer Group is seeking a motivated Design Engineer to join our Water Resources / Surface Water Service Line. This ...

DESIGN ENGINEER WATER RESOURCES / SURFACE WATER SERVICE LINE POSITION SUMMARY Spicer Group is seeking a motivated Design Engineer to join our Water Resources / Surface Water Service Line. This ...

DESIGN ENGINEER WATER RESOURCES / SURFACE WATER SERVICE LINE POSITION SUMMARY Spicer Group is seeking a motivated Design Engineer to join our Water Resources / Surface Water Service Line. This ...

DESIGN ENGINEER WATER RESOURCES / SURFACE WATER SERVICE LINE POSITION SUMMARY Spicer Group is seeking a motivated Design Engineer to join our Water Resources / Surface Water Service Line. This ...

Engineer, Water

Washington, DC · Hybrid

$81K - $121K/yr

Perform engineering design and consulting for water, wastewater, and stormwater infrastructure projects. * Prepare hydraulic and hydrologic calculations to support system design, including pipe ...

This is an exciting opportunity for a self-motivated engineer to support one of the best-qualified municipal consulting firms in the country. As the Senior Water Design Manager, you will utilize your ...

New

Engineer, Water

Washington, DC · On-site

$81K - $121K/yr

Perform engineering design and consulting for water, wastewater, and stormwater infrastructure projects. * Prepare hydraulic and hydrologic calculations to support system design, including pipe ...

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Showing results 1-20

Freelance Water Design Engineer information

See salary details

$14

$47

$132

How much do freelance water design engineer jobs pay per hour?

As of Aug 21, 2026, the average hourly pay for freelance water design engineer in the United States is $47.71, according to ZipRecruiter salary data. Most workers in this role earn between $24.28 and $61.78 per hour, depending on experience, location, and employer.

What is the difference between Freelance Water Design Engineer vs Civil Water Engineer?

AspectFreelance Water Design EngineerCivil Water Engineer
CredentialsRelevant engineering degrees, certifications in water systemsEngineering degrees, professional licensure (PE), certifications in water resources
Work EnvironmentIndependent, project-based, remote or on-siteTypically employed by firms, government agencies, or construction companies
Employer & Industry UsageFreelance basis for consulting firms, engineering consultancies, or clientsPublic and private sector infrastructure projects, construction, and consulting

Freelance Water Design Engineers often work independently on water system projects, offering specialized consulting services. Civil Water Engineers are usually employed by organizations involved in large-scale infrastructure projects. Both roles require similar credentials but differ mainly in employment setting and project scope.

More about Freelance Water Design Engineer jobs

What cities are hiring for Freelance Water Design Engineer jobs?

Cities with the most Freelance Water Design Engineer job openings:

What are the most commonly searched types of Water Design Engineer jobs?

The most popular types of Water Design Engineer jobs are:

What states have the most Freelance Water Design Engineer jobs?

States with the most job openings for Freelance Water Design Engineer jobs include:

What job categories do people searching Freelance Water Design Engineer jobs look for?

The top searched job categories for Freelance Water Design Engineer jobs are:

Infographic showing various Freelance Water Design Engineer job openings in the United States as of August 2026, with employment types broken down into 89% Full Time, 7% Part Time, and 4% Contract. Highlights an 83% Physical, 5% Hybrid, and 12% Remote job distribution, with an average salary of $99,230 per year, or $47.7 per hour.

$74K - $101K/yr

Full-time

Medical, Dental, Vision, Life, Retirement

Posted 7 days ago


Kleinfelder rating

7.7

Company rating: 7.7 out of 10

Based on 19 frontline employees who took The Breakroom Quiz

267th of 450 rated engineering


Job description

Take Your Environmental Career to the Next Level 

Kleinfelder, a Forbes' Top Employer for Engineers in North America, is committed to a people-first culture, technical excellence, and creating opportunities where employees can thrive!

Are you ready to be challenged, make a difference, and experience professional growth in your career? Kleinfelder's Environmental team is looking for you! From environmental planning, permitting, remediation, and site characterization to chemical data management and hydrogeology, Kleinfelder offers a variety of services designed to provide technically appropriate and cost-effective solutions. 

Step into Your New Role

We are seeking a Water Design Engineer experience in designing, implementing, and managing decentralized water and wastewater treatment systems for commercial and industrial clients. The ideal candidate will bring technical expertise, regulatory knowledge, and client-focused solutions to support sustainable water infrastructure projects. 

Key Responsibilities: 

  • Oversee design and installation of decentralized/on-site water/wastewater treatment systems tailored to commercial applications. 
  • Oversees site assessments, feasibility studies, and hydraulic modeling to determine optimal system configurations. 
  • Develop and review engineering plans, specifications, and proposals for wastewater infrastructure. 
  • Ensure compliance with local, state, and federal environmental regulations. 
  • Collaborate with clients, contractors, and regulatory agencies to deliver cost-effective and sustainable solutions. 
  • Provide technical guidance on system operation, maintenance, and troubleshooting. 
  • Prepare environmental documentation, technical reports, and permit applications. 
  • Lead or support construction oversight and commissioning of treatment systems. 
  • Stay current with emerging technologies and best practices in decentralized water/wastewater management. 

Qualifications:  

  • Bachelor of Science in engineering.
  • 3-5 years' experience in Project Managment of water/wastewater systems.
  • 6-10 years of experience in water and wastewater treatment system design.
  • Experience in water/wastewater engineering or management, with emphasis on decentralized systems. 
  • Must have valid OH Driver's License. 

Following an offer, candidates will be required to satisfactorily complete employment reference checks, verification of professional licensure and/or educational credentials, a motor vehicle report (MVR), and a comprehensive background check.

Move Forward with Kleinfelder:Kleinfelder and its’ subsidiaries and affiliates, has been connecting great people to the best work since 1961. We are engineers, scientists, and construction professionals providing solutions that improve our clients’ transportation, water, energy, and other private infrastructure. As a responsive, cross-disciplinary team of bright, curious, and innovative problem-solvers, we are dedicated to doing the right thing, every day, on every project from over 110 offices in the US, Canada, and Australia.Connecting great people to the best work is our purpose – together, we deliver. 

Progress with an Employer that Values You 

Kleinfelder, and its’ subsidiaries and affiliates, is an inclusive organization free from discrimination. We are a stronger organization when we are a diverse workforce and believe that through diversity, equity, and inclusion comes creativity, innovation, and unity. We are proud to offer the following: 

Benefits:Kleinfelder, and its’ subsidiaries and affiliates, offers an excellent compensation and benefits package, including: medical, dental, vision, life insurance, 401(k) plan, and paid holidays. 

Career Development:We are committed to investing in the professional development of our staff, offering each employee every opportunity to grow, develop, and take control of their career paths. We support these efforts through reimbursements for continuing education as well as many of the expenses associated with trainings and certifications, and opportunities for career development through our internal Mentoring Program. 

Equal Opportunity:Kleinfelder, and its’ subsidiaries and affiliates, is an Equal Opportunity Employer – Minorities/Women/Disabled/Veterans. (Compliant with the new VEVRAA and Section 503 rules)

NOTICE TO THIRD PARTY AGENCIES 

Please note that Kleinfelder, and its’ subsidiaries and affiliates, does not accept unsolicited resumes from recruiters or employment agencies. In the absence of a signed Recruitment Fee Agreement, Kleinfelder, and its’ subsidiaries and affiliates, will not consider or agree to payment for any referral compensation or recruiter fee. In the event a recruiter or agency submits a resume or candidate without a previously signed agreement, Kleinfelder, and its’ subsidiaries and affiliates, explicitly reserves the right to pursue and hire those candidate(s) without any financial obligation to the recruiter or agency. Any unsolicited resume, including those submitted to hiring managers, are deemed to be the property of Kleinfelder. 


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