Mid Level SCADA / PLC Programmer

Overview

Carollo Engineers is an internationally recognized environmental engineering firm that specializes in the planning, design, and construction of water and wastewater facilities. We are looking for a SCADA / PLC Programmer to design, develop, and troubleshoot control systems that seamlessly integrate with plant operations, driving improved efficiency, reliability, and performance.

At Carollo, you'll make a meaningful impact by contributing to projects that matter. We foster a collaborative and inclusive team culture where diversity is celebrated, and every individual feels valued. You'll work alongside a passionate, driven team of professionals committed to excellence. As we strive to be the leading water consulting firm, you'll also find Carollo is the best place to grow your career.

This posting is scheduled to expire on 02 / 28 / 2026 if the position has not been filled prior to that date.

Responsibilities

Design, develop, and implement SCADA and PLC control systems for water and wastewater treatment processes

Program, test, and troubleshoot PLCs (Allen Bradley, Schneider, Siemens, etc.) to control various plant equipment and processes

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

Collaborate with engineering teams to develop system specifications and requirements, integrating automation solutions with mechanical, electrical, and process systems

Perform system testing, simulation, and commissioning of SCADA and PLC systems in new installations or upgrades

Diagnose and resolve control system issues, providing technical support for system malfunctions or operational problems

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

Stay updated on industry trends and technology advancements, applying knowledge to continuously improve system functionality and efficiency

Qualifications

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

Proficiency in programming PLCs (e.g., Allen Bradley, Siemens, Schneider) and experience with automation protocols such as Modbus, Ethernet / IP, or Profibus

Experience with SCADA software platforms such as Wonderware, Ignition, GE iFix, or similar

Understanding of HMI development, including graphical user interfaces, alarm management, and real-time data trending

Strong foundation in control systems design and troubleshooting, including electrical and instrumentation systems

Knowledge of networking and communication protocols used in industrial control systems (e.g., TCP / IP, OPC)

Familiarity with industrial control hardware, including VFDs, sensors, actuators, and other field devices

Ability to read and interpret electrical schematics and P&IDs (Piping and Instrumentation Diagrams)

Proven ability to diagnose and troubleshoot control system issues and conduct root cause analysis

Strong technical documentation skills, including the ability to write technical reports, user manuals, and system documentation

Excellent communication skills, both written and verbal, for collaborating with multidisciplinary teams and providing technical support to operators and maintenance personnel

Willingness to travel to job sites for installation, commissioning, and troubleshooting

Preferred Qualifications

Advanced training in communication protocols like Modbus Serial, Modbus TCP, A / B Ethernet IP, Siemens / Profibus, DNP3, MQTT

Bachelor's degree in electrical engineering, computer engineering, automation, or a related field

Certifications such as ISA Certified Automation Professional (CAP) or related credentials are a plus

Pay Range

$85,000 to $145,000 annually. This is the lowest to highest salary we in good faith believe we would pay for this role at the time of this posting. We may ultimately pay more or less than the posted range, and the range may be modified in the future. An employee's pay within the salary range will be based on several factors including, but limited to, relevant education, qualifications, certifications, experience, skills, seniority, geographic location, performance, and business or organizational needs.

Other Compensation and Benefits

Carollo is committed to providing employees with a competitive, comprehensive benefits program that provides the support employees and their families need to lead healthy, productive lives. Carollo's benefits package includes paid time off and holidays, comprehensive health insurance coverage, pre-tax savings account options for healthcare, dependent care and commuter expenses, disability insurance and life insurance options for you and your dependents. We also offer free Caregiver Support, Travel Assistance, counseling services, discount programs, and a Lifestyle Reimbursement Account. Other compensation that may be available includes : 401(k) company contribution matching, tuition reimbursement, discretionary bonuses, career advancement bonuses, professional registration bonuses, employee referral bonuses, and compensatory time for exempt employees. Flexible work arrangements may also be available. Eligibility for benefits varies based on employment status.

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Job Locations US-CO-Littleton | US-CA-Sacramento | US-WA-Seattle | US-CO-Westminster

ID 2024-3550

Category Engineering

Type Full-time, Regular