Senior Project Engineer; Classification: Engineer III

We’re searching for a standout Senior Project Engineer (Classification: Engineer III) to bring technical expertise, leadership, and vision to our team. If you're ready to take on a role that’s more than just a job—where your work truly matters—then this is your calling.

Join a powerhouse team of engineering and environmental professionals in King County, Solid Waste Division—where innovation meets impact. We’re not just building systems; we’re redefining resource recovery, commodity reuse, materials management, recycling, and disposal for communities, businesses, and residents across the region. And we’re doing it with purpose: protecting the environment while delivering one of the most forward-thinking waste management systems in the nation.

Step into the Facility, Engineering and Science Section, where personal growth and professional excellence go hand-in-hand. From high-stakes capital projects to the daily operations of King County’s only active landfill, we’re driven by curiosity, collaboration, and a commitment to engineering brilliance.

Let’s build something extraordinary together.

This posting may be used to establish a list of qualified candidates for the Senior Project Engineer position within the Solid Waste Division during the following six months.

About the Role:

This senior engineering role will be the technical lead responsible for technical expertise, quality assurance and control and problem solving for Capital Improvement Projects (CIP) from design to commissioning, Engineering Support to Operations for smaller projects, maintenance and daily operation, Project Management of non-CIP’s for the Cedar Hills Regional Landfill and engineering support to other groups and projects within the Solid Waste Division.

You do not need to be a Landfill expert to excel in this role. Our landfill engineers come with a variety of education and experience - some with gas collection and conveyance systems, some with wastewater collection, conveyance, and treatment systems, or even some with a civil, mechanical, and/or chemical engineering background. Many of our engineers enjoy this variety in their work.

As landfill engineering is such a small field, our landfill engineers receive both on the job and classroom training to fill out any gaps in these many areas of application.

As an Engineer III in our organization, along with the above responsibilities, the individual in this position will provide guidance and mentorship to junior engineers and scientists, work closely with capital project managers and other engineers and scientists to foster highly functioning teams, and bring a positive attitude and energy to set a tone of excellence and continuous learning where all team members are valued.

About the Team:

The Facility Engineering and Science Section (FESS) plays a vital role in King County’s Solid Waste Division, driving major programs and projects with a focus on safety and environmental stewardship. This dynamic team includes experts in engineering, science, technology, and project management—delivering essential services to the county’s residents and businesses.

Commitment to Equity, Racial and Social Justice:

King County is a diverse and vibrant community that represents cultures from around the world. Our True North is to create a welcoming community where everyone can thrive. We prioritize equity, racial and social justice, making it a foundational and daily expectation for all employees. As an Engineer III, you will actively apply these principles in all aspects of your work.

More information about our commitment is available on our equity page.

Apply now for a rewarding career at the Solid Waste Division of King County Department of Natural Resources & Parks (DNRP). Join our talented workforce in protecting and restoring the natural environment and promoting more resilient, sustainable, and equitable communities. Enjoy training, comprehensive benefits, and growth opportunities.

What You Will Be Doing:

• Lead the Subject Matter Experts (SMEs) in the review and evaluation of consultant designs, plans, and specifications for landfill development, wastewater systems, and/or landfill gas systems. A…