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Mid Level SCADA/PLC Programmer
Carollo Engineers
Design, develop, and support SCADA/PLC control systems for water/wastewater plants.
13d ago
$85,000 - $145,000
Intermediate (4-7 years), Experienced (8-12 years)
Full Time
Seattle, WA
Onsite
Company Size
1,000 Employees
Service Specialisms
Planning
Design
Construction Management
Water Supply Engineering
Water Treatment Engineering
Water Distribution Engineering
Watershed and Water Resources Planning
Storm Water Planning
Sector Specialisms
Water
Wastewater
Water Resources
Industrial
Private Sector Water Treatment
Wastewater Treatment
Water Reuse
Brine Management
Role
What you would be doing
scada design
plc programming
hmi development
system commissioning
control debugging
documentation
- Participate in field service and commissioning activities, ensuring proper implementation of control strategies and seamless system startup
- Document control system designs and configurations, including wiring diagrams, PLC logic, and HMI screen layouts
- Collaborate with engineering teams to develop system specifications and requirements, integrating automation solutions with mechanical, electrical, and process systems
- Design, develop, and implement SCADA and PLC control systems for water and wastewater treatment processes
- Stay updated on industry trends and technology advancements, applying knowledge to continuously improve system functionality and efficiency
- Perform system testing, simulation, and commissioning of SCADA and PLC systems in new installations or upgrades
- Develop HMI applications for operator interfaces, including configuring graphics, alarms, and data trends to support plant operations
- Maintain and modify existing SCADA systems, ensuring efficient and reliable performance across all operational systems
- Program, test, and troubleshoot PLCs (Allen Bradley, Schneider, Siemens, etc.) to control various plant equipment and processes
- Diagnose and resolve control system issues, providing technical support for system malfunctions or operational problems
What you bring
scada
plc
hmi
modbus
isa cap
bachelor's
- Ability to read and interpret electrical schematics and P&IDs (Piping and Instrumentation Diagrams)
- Advanced training in communication protocols like Modbus Serial, Modbus TCP, A/B Ethernet IP, Siemens/Profibus, DNP3, MQTT
- 5-10 years of hands-on experience with SCADA, PLC, and HMI programming in industrial automation, preferably in water/wastewater treatment or a similar process-driven environment
- Certifications such as ISA Certified Automation Professional (CAP) or related credentials are a plus
- Willingness to travel to job sites for installation, commissioning, and troubleshooting
- Proficiency in programming PLCs (e.g., Allen Bradley, Siemens, Schneider) and experience with automation protocols such as Modbus, Ethernet/IP, or Profibus
- Familiarity with industrial control hardware, including VFDs, sensors, actuators, and other field devices
- Proven ability to diagnose and troubleshoot control system issues and conduct root cause analysis
- Understanding of HMI development, including graphical user interfaces, alarm management, and real-time data trending
- Bachelor’s degree in electrical engineering, computer engineering, automation, or a related field
- Strong technical documentation skills, including the ability to write technical reports, user manuals, and system documentation
- Experience with SCADA software platforms such as Wonderware, Ignition, GE iFix, or similar
- Excellent communication skills, both written and verbal, for collaborating with multidisciplinary teams and providing technical support to operators and maintenance personnel
- Knowledge of networking and communication protocols used in industrial control systems (e.g., TCP/IP, OPC)
- Strong foundation in control systems design and troubleshooting, including electrical and instrumentation systems
Information not given or found
Training + DevelopmentInformation not given or found
Interview process
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Visa SponsorshipInformation not given or found
Security clearanceInformation not given or found
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Company
Overview
- Founded with a singular focus on water and wastewater infrastructure, the company has grown into a recognized leader in the industry.
- Excels in providing innovative engineering solutions for water resources, water treatment, and wastewater systems across the U.S.
- Works on major projects including large-scale water treatment plants, wastewater infrastructure, and complex pipeline networks.
- Specializes in consulting, design, construction management, and project delivery, ensuring water systems are efficient and sustainable.
- Has a team of highly skilled engineers known for technical expertise and commitment to advancing water technologies.
- Operates in both municipal and private sectors, transforming communities through robust and reliable water and wastewater systems.
- Has a strong U.S. presence and is often called upon for international water infrastructure projects.
- Offers a diverse project portfolio from small-scale residential systems to large urban water networks, demonstrating versatility.
4.5★ Rating
Glassdoor Culture Score
The company receives a high culture rating on Glassdoor, with slight differences noted between male and female employees.
3.2/5 Score
Comparably Culture Score
The company's overall culture score according to Comparably, reflecting employee sentiment and workplace experience.
- Employees highlight: “supportive and caring management,” “flat org chart,” “collaborative culture across different offices and regions”
- Employee reviews emphasize technical excellence, autonomy, flexible schedules, and strong work–life balance
$1.8B Project
EchoWater Project
Upgrade for nutrient removal and drought-resistant recycled water.
15% Emissions Reduction
GHG Emissions Tool Success
Reduced emissions over 5 years and ~80% since pre-2019 at client site.
~80% Reduction
GHG Emissions Improvement
Significant decrease in emissions since pre-2019 at client site.
2023 Launch
Resilience & Sustainability Practice
Launched to advise on climate mitigation and sustainability assessments.
- Planet goal: climate neutral, zero waste to landfill, honor local hydrology cycles, purchase environmentally preferable products
- People goal: attract/retain talent, contribute to workforce and community sustainability
- Prosperity goal: deliver sustainable services and maintain profitability
- In‑house Sustainability Plan with regular updates, comprehensive metrics, and adaptive approach (align, engage, appraise, evolve)
- Award‑winning: 2022 ENR Merit Award for sustainability on South Adams County Water project
4.5★ men / 4.3★ women
Gender Ratings on Glassdoor
The company has received a 4.5-star rating for men and a 4.3-star rating for women on Glassdoor, reflecting gender-specific feedback ratings for the company.
- No publicly shared DEI strategy or values statement
- Comparably shows no formal values or mission alignment data on DEI
- Employee feedback indicates some 'good ole boys' upper management culture in certain locations
- No clear published gender representation metrics or diversity outcomes beyond rating scores
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