What Does a Controls Engineer Do?

A Controls Engineer designs and supports systems that use information from sensors to control machines and industrial processes. The engineer translates operating needs into control logic and system designs, then tests whether equipment responds as intended. The role also involves diagnosing faults and verifying that changes work safely during startup and ongoing operation. By making automated equipment more reliable and easier to operate, Controls Engineers help organizations maintain production and meet process requirements.

What Is a Controls Engineer?

A Controls Engineer is an engineering professional who develops the hardware and software that govern how equipment operates. A system may use sensors to measure conditions, a programmable logic controller (PLC) to apply programmed rules, and motors or valves to carry out commands. Operators may use a human-machine interface (HMI) to monitor status and respond to alarms.

The engineer connects the intended process to its technical implementation. For example, a filling machine can be designed to start only after a container is detected and to stop when the target fill level is reached. The control design also needs to specify what happens when a required signal is missing or a fault occurs. The engineer’s work may cover design, programming, testing, commissioning, and support, with the exact scope shaped by the employer and project.

What Are the Main Responsibilities of a Controls Engineer?

Translate operating needs into a control design. The engineer works with operators and project partners to understand the normal operating sequence and the limits the system must observe. They define how equipment should respond to expected conditions and faults. Those requirements guide choices about controllers, input/output hardware, field devices, and operator displays.

Develop and document the system. Controls Engineers write or revise control logic, often for PLCs, and may configure HMI screens or other supervisory systems. Electrical drawings show how sensors and actuators connect to control hardware. Program notes and configuration records explain important settings and behavior so that installation and future maintenance do not depend on guesswork.

Test and commission equipment. Before startup, the engineer reviews the programmed sequence and may use simulated signals to check expected responses. At the site, the team verifies that field devices are connected to the correct inputs and that commands reach the intended equipment. During commissioning, the engineer observes operation and tests relevant fault responses. They record changes so the final program and documentation match the installed system.

Investigate problems and verify changes. When equipment stops or behaves unexpectedly, the engineer traces the signal path from the sensor through the control logic to the device that should respond. This helps locate whether the cause lies in the program, a sensor, wiring, or another part of the system. The engineer makes changes based on the evidence and checks that the correction resolves the problem without disrupting other operating conditions.

Address assigned safety requirements. Controls Engineers implement and test protective control functions specified for the equipment, such as preventing hazardous motion when a guard is open. They work with safety specialists and other project members to verify the required response and document the result. The precise requirements depend on the equipment and its risk assessment.

What Does a Controls Engineer Do on a Daily Basis?

A typical day may begin with reviewing a project schedule or production issue and confirming what the equipment is supposed to do. The engineer may talk with an operator about when a fault appears, then compare that account with alarm history, controller status, and electrical drawings. That initial investigation helps narrow the problem before any program changes are considered.

For design work, the engineer may next revise a sequence or control program and review it with colleagues responsible for the machine or process. They document the changes and prepare tests for normal operation and likely fault conditions. If the project is at a customer site or plant, the engineer may then work with technicians to check field signals and confirm that the equipment responds as designed.

Near startup, the day can shift toward commissioning and troubleshooting. The engineer observes the system under operating conditions, investigates unexpected behavior, and verifies corrections with the project team. They close out by recording test results and updating the program or drawings so the organization has an accurate record for continued operation.

What Skills Does a Controls Engineer Need?

Control systems and programming: The engineer needs to understand how inputs, programmed conditions, and outputs combine to control equipment. When writing PLC logic, for example, they define what must be true before a motor starts and what should happen if a required input disappears.

Electrical and instrumentation knowledge: Reading electrical drawings and understanding sensors and actuators helps the engineer check whether a field signal reaches the expected controller input. This knowledge is useful when a machine’s program appears correct but the physical device does not behave as expected.

Systematic troubleshooting: Instead of changing code based only on a symptom, the engineer follows the signal and sequence to find where actual behavior diverges from the design. This approach helps distinguish a logic problem from a failed sensor or wiring issue.

Clear communication and documentation: Operators can explain what happens during production, while technicians can confirm what they observe at the equipment. The engineer uses those details to investigate faults and records program and drawing changes so colleagues can maintain the system later.

Careful testing and attention to safety: The engineer checks that normal sequences work and that assigned protective responses occur under relevant fault conditions. They coordinate with project partners when a change could affect equipment behavior beyond the immediate issue.

How Much Does a Controls Engineer Earn?

The U.S. Bureau of Labor Statistics does not report a separate wage figure for Controls Engineers. As a related benchmark rather than a Controls Engineer-specific estimate, the BLS reports a median annual wage of $120,630 for electrical engineers in May 2025. Actual pay for a Controls Engineer can vary with location, industry, experience, and the scope of the position.

What Is the Career Progression for a Controls Engineer?

People may enter the field with an engineering degree or build relevant experience through technical education and work with industrial equipment. Employers’ preferred education and experience vary, and a particular degree or license should not be assumed to be required for every Controls Engineer role. Familiarity with a company’s equipment or control platform can be useful when it matches the job’s needs.

As they gain experience, Controls Engineers may take responsibility for larger projects, more complex system designs, or technical coordination across a project team. Some move into systems architecture or technical leadership. Others pursue engineering management, while specialists may continue to deepen their expertise in a particular process or control system.

How Contingent Workforce Management Helps Businesses Hire Controls Engineers

Contingent workforce management services help businesses arrange and administer temporary or project-based talent. A manufacturer commissioning a new production line may need a Controls Engineer with experience developing PLC logic and testing equipment during startup, even though the workload will ease after handoff. For a defined assignment, hiring a worker directly and using third-party payrolling can be a lower-cost alternative to a staffing agency.

TCWGlobal helps companies manage contingent Controls Engineers through payrolling and workforce support. When a company has already selected a specialist for a short commissioning project, these services can handle employment and pay administration while the company’s engineering team directs the technical work. This can save the company money compared with using a staffing agency and reduce administrative work for its internal team.