Ddt Jobs (NOW HIRING)

Salary : $104,987.58 - $133,077.57 Annually
Location : South Treatment Plant - 1200 Monster Road SW, Renton, WA
Job Type: Career Service (Exec)
Job Number: 2026-27295
Department: DNRP-Natural Resources & Parks
Division: Wastewater Treatment
Opening Date: 06/02/2026
Closing Date: 6/16/2026 11:59 PM Pacific
FLSA: Non-Exempt
Bargaining Unit: W4 : TEA-WTD, DNRP-Staff
Full- or Part-Time: Full Time
Hours/Week: 40 hours/week
Summary
This is a great opportunity to apply your skills to solve real world problems to improve our regional wastewater infrastructure, water quality, the environment and public health. You will combine problem-solving, data collection & analysis, time management, planning and prioritization, communication, and collaboration knowledge, skills, and abilities to perform wastewater conveyance system investigations, flow monitoring equipment maintenance and troubleshooting, collect, analyze, and communicate wastewater flow data and information used to support various conveyance system improvement and combined sewer overflow projects and programs. You will have the opportunity to work individually and as part of a team with a wide range of people throughout Wastewater Treatment division (WTD), with consultants and other governmental agencies.
About the Role:
The primary functions of this position are to perform Dye-Dilution Testing (DDT) in wastewater systems to verify flow meter accuracy including but not limited to conducting sampling and laboratory analysis of wastewater to support flow measurement accuracy verification, performing field surveys, site investigations, and inspections of sewer structures, maintenance holes, and conveyance assets for DDT suitability, identifying suitable injection and sampling points and verify connectivity between upstream and downstream locations, operate, maintain, and troubleshoot dye-injection equipment, fluorometers, samplers, and related tools or equipment, collect, record, and analyze field and laboratory data using established QA/QC processes and Standard Operating Procedures (SOPs), assist in troubleshooting flow and data discrepancies in coordination with WTD modeling engineers and flow monitoring data analysts, and develop traffic safety plans for DDT sites and coordinate with local agencies as needed.
The position works under the oversight of a CM III and/or a lead (CM IV) and will work both independently and as part of the Flow Monitoring & Analysis (FM&A) team. The position may involve making decisions with minimal guidance on DDT activities that may not have established or clearly defined guidelines or procedures. It will also support the FM&A team during flow meter installations, and flow data quality and maintenance issues.
These tasks are performed to support the existing system-wide flow monitoring program, and future small-to large-scale flow monitoring projects that provide efficient and effective flow data and information in support of King County WTD's Combined Sewer Overflow (CSO) Control Program, long-term Conveyance System Improvement (CSI) projects, regulatory reporting requirements, and construction and inspection activities within the WTD's Wastewater collection system.
About the Team:
The Flow Monitoring and Analysis (FM&A) Work Group performs monitoring of WTD's conveyance system to provide reliable flow data and information for the management and upgrades of the (wastewater conveyance) system. The Dye-Dilution Testing (DDT) Field Tech will work and collaborate with FM&A staff, project managers, planners, modeling staff, operations staff, and others to ensure useful reliable flow data and information meets the capital and operating needs of WTD.
Some of the projects and efforts the FM&A work group supports include:

• Assess system capacity and Infiltration/Inflow issues, and determine system needs for long-term planning for the management and upgrade of the WTD conveyance system
• Perform Hydraulic Modeling and Calibration
• Quantify CSOs for NPDES reporting to the Washington Department of Ecology (DOE)
• Understand and evaluate flow conditions in support of a wide range of WTD programs and projects including Sewer Heat Recovery, Mouth of Duwamish (MOD), and Conveyance System Improvements.
• Determine the timing and sizing of future facilities and to foster the efficient use of funds
• Manage the system during peak and/or emergency storm or flow events including collaborating with local agencies (example - monitor UIC wells and SPU/KC M&M agreements)
• Support construction and O&M activities within the system

Join our team dedicated to ensuring clean water for generations to come! With about 1000 employees engaged in planning, designing, building, and operating treatment facilities, our agency is at the forefront of environmental stewardship. Success for us means upholding our legacy while promising future generations a pristine environment.
We partner with regulatory agencies to reduce harmful waste discharge and actively educate the public and businesses on water quality protection. We prioritize accountability to our ratepayers and operate a well-managed agency that services over 2.3 million King County residents. Our regional wastewater treatment system not only sustains a healthy environment but also fuels economic development, fostering prosperity in our region. If you're passionate about making a difference and thrive in a collaborative environment, join us in our mission to safeguard our precious water resources.
Commitment to Equity, Racial and Social Justice:
King County, named after Dr. Martin Luther King, Jr., 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 a Dye-Dilution Testing Field Tech, you will actively apply these principles in all aspects of your work. Learn more about our commitment at
Apply now for a rewarding career at the Wastewater Treatment 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.
Job Duties
What You Will Be Doing:

• Perform dye-dilution testing (DDT) in wastewater systems to verify flow meter accuracy
• Conduct sampling and laboratory analysis of wastewater to support flow measurement accuracy verification.
• Perform field surveys, site investigations, and inspections of sewer structures, maintenance holes, and conveyance assets for DDT suitability.
• Identify suitable injection and sampling points and verify connectivity between upstream and downstream locations.
• Operate, maintain, and troubleshoot dye-injection equipment, fluorometers, samplers, and related tools or equipment.
• Collect, record, and analyze field and laboratory data using established QA/QC processes and Standard Operating Procedures (SOPs).
• Assist in troubleshooting flow and data discrepancies in coordination with WTD modeling engineers and flow monitoring data analysts.
• Develop traffic safety plans for DDT sites and coordinate with local agencies as needed
• Support inventory tracking, equipment maintenance activities, and coordination with equipment vendors regarding maintenance and operational issues related to DDT and other flow monitoring equipment.
• Prepare accurate field notes, technical reports, and documentation of testing activities and inspection results.
• Follow confined-space entry requirements, PPE standards, and traffic control procedures.
• Ensure safe handling of dyes and compliance during field operations.
• Create or update work requests and track and complete work orders in computerized maintenance management systems (Maximo) and provide information as needed
• Perform a variety of administrative duties such as development of work methods and upkeep of records; review field procedures and provide input into the update of the flow monitoring SOPs as needed
• During emergencies, conduct or assist inspections to determine the extent of damage to King County owned facilities, equipment, and assets and prepare reports
• Perform other duties as assigned and participate in special projects and other duties as assigned by the team Lead and/or work group Supervisor.

Experience, Qualifications, Knowledge, Skills
Qualifications You Bring:

• A good understanding of basic hydraulics especially as related to measurement of flow and working knowledge and understanding of the methods and processes of flow monitoring, including field procedures, analyzing data for consistency, trends, patterns, and outliers
• Demonstrated skill and ability to work effectively and collaboratively with a diverse group of individuals and stakeholders from diverse backgrounds, cultures, and lived experiences, including co-workers and management, and skill and ability in handling difficult conversations.
• Very good attention to detail and an ability to organize and handle multiple tasks, meet established deadlines, and maintain accurate records
• Possess excellent oral and written communication skills and be a clear communicator with demonstrated ability to work with a variety of staff at different levels.
• Valid Washington State Driver's License; demonstrated ability to drive a Ford Transit 350 High Roof Cargo Van (148" wheelbase, extended body, 4WD) with an enclosed, 2 -axle, 6'x12' trailer on city streets and highways

Competencies You Bring:

• Tech Savvy: Anticipating and adopting innovations in business- building digital and technology applications.
• Manages Complexity: Making sense of complex, high quantity, and sometimes contradictory information to effectively solve problems.
• Collaborates: Building partnerships and working collaboratively with others to meet shared objectives.
• Interpersonal Savvy: Relating openly and comfortably with diverse groups of people.
• Communicates Effectively: Developing and delivering multi-mode communications that convey a clear understanding of the unique needs of different audiences.

Required Licenses:

• Valid Washington State Driver's License

It Would Be Great if You Also Bring:

• Experience in performing field Dye-Dilution Testing (DDT) in wastewater systems to verify flow meter accuracy
• Experience operating and maintaining of dye injectors, fluorometers, samplers, and other measurement technologies.
• Ability to interpret system behavior and flow/dye-movement anomalies
• Ability to read and interpret engineering drawings and as-builts.
• Familiarity with portable flow monitoring, sewer inspection, or wastewater operations.
• Familiarity with a Computerized Maintenance Management System (CMMS) such as Maximo.
• Experience developing, supporting, or updating SOP documentation.
• Demonstrated technical competence in all aspects of flow monitoring including site investigations, meter installation, field verification, data collection, detailed data analysis, and reporting; ability to inspect and approve installation of approved flow meters and to recognize installation deficiencies and omissions and develop a corrective action listing
• Working knowledge and experience in the areas of sewer inspection, testing, monitoring, and operations and maintenance of a water or wastewater collection system
• Working knowledge of and experience in a Computerized Maintenance Management System (CMMS) such as Maximo
• Working knowledge of Geographic Information Systems such as ArcGIS
• Training and certification in First Aid/CPR, Confined Space Entry, and Flagging/Work Zone Traffic Control

Supplemental Information
Working Conditions:

• Work Location: South Treatment Plant - 1200 Monster Road SW, Renton WA 98057.
• Work Schedule: This full-time position works a 40-hour work week. This position is covered under the provisions of the Fair Labor Standards Act (FLSA) and is overtime eligible.
• Union Representation: Technical Employees' Association (TEA) - Wastewater Treatment Division

Application and Selection Process:
We welcome applications from all qualified applicants. We value diversity, diverse perspectives and life experience and encourage people of all backgrounds to apply.
Application materials will be screened for clarity, completeness and alignment with the experience, qualifications, knowledge, and skills essential for this role to determine which candidates may be invited to participate in one or more panel interviews.
Anticipated Timeline for this recruitment: (subject to change)

• Panel interviews (50 Minutes): Virtual week of June 29

To apply, submit a:

• Complete Application
• Resume
• Cover Letter

Note: Additional documents won't be considered during minimum qualification screening.
Who to Contact: For more information regarding this recruitment, please contact Mark Workinger at mworkinger@kingcounty.gov
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