PLC Engineer | Semiconductor Chemical Systems (Phoenix)

About Us

Founded in 1988, Marketech International Corp. (MIC) is a global technology and engineering company supporting semiconductor, high-tech manufacturing, cleanroom, and mission-critical facility projects. MIC provides turnkey facility integration solutions, including cleanroom and MEP construction, DI water, gas and chemical supply systems, wastewater treatment, facility monitoring and control systems, installation, and maintenance services.

Through Marketech International Corporation USA, we support major semiconductor and industrial projects across the United States.

Job Overview

Marketech International Corporation USA is seeking a skilled and detail-oriented PLC Engineer – Semiconductor Chemical Systems to support the design, programming, integration, testing, commissioning, and maintenance of automated control systems used within semiconductor chemical delivery and distribution systems.

This position will work with PLCs, HMIs, SCADA systems, instrumentation, sensors, valves, pumps, actuators, chemical delivery equipment, and related process-control components. The PLC Engineer will collaborate closely with controls engineers, electrical engineers, project managers, technicians, field teams, equipment vendors, subcontractors, and customers throughout system design, installation, startup, commissioning, and ongoing operations.

The ideal candidate has hands-on experience with industrial automation and PLC programming, understands electrical and process-control systems, and is comfortable troubleshooting equipment and control-system issues in active semiconductor or industrial environments.

Key Responsibilities

• Develop, modify, test, and troubleshoot PLC programs for semiconductor chemical delivery and distribution systems.
• Support PLC-based automation for chemical cabinets, valve manifold boxes, pumps, valves, actuators, sensors, instrumentation, and related process equipment.
• Develop and modify HMI screens, alarms, interlocks, status displays, trends, and operator controls.
• Support integration between PLCs, HMIs, SCADA systems, facility monitoring systems, and field instrumentation.
• Perform PLC and control-system commissioning, startup, functional testing, and troubleshooting.
• Review control philosophies, sequences of operation, cause-and-effect matrices, alarm requirements, and interlock logic.
• Configure and troubleshoot digital and analog I/O, instrumentation, communication networks, and control devices.
• Support Factory Acceptance Testing (FAT), Site Acceptance Testing (SAT), system qualification, and turnover activities.
• Troubleshoot PLC logic, communication failures, instrumentation issues, equipment faults, alarms, and control-system performance concerns.
• Work with field technicians and electricians during equipment installation, wiring verification, I/O checkout, startup, and commissioning.
• Review electrical drawings, control schematics, wiring diagrams, P&IDs, equipment layouts, and technical specifications.
• Perform point-to-point and I/O verification between field devices and PLC control systems.
• Support integration and communication using industrial protocols such as Ethernet/IP, Modbus TCP/IP, OPC, BACnet, or similar protocols.
• Assist with configuration and troubleshooting of variable frequency drives, motor controls, sensors, transmitters, valves, pumps, and other automated equipment.
• Maintain PLC programs, HMI applications, control-system backups, revision histories, and technical documentation.
• Document programming changes, troubleshooting activities, commissioning results, system configurations, and testing records.
• Coordinate with project managers, engineers, vendors, contractors, and customers regarding controls-related requirements and technical issues.
• Support preventive maintenance, system upgrades, control modifications, and continuous improvement activities.
• Identify potential control-system reliability, safety, or operational risks and recommend corrective actions.
• Respond to field issues and provide technical support during system startup and production operations.
• Follow company safety requirements and site-specific procedures when working around chemical and process equipment.

Required Qualifications

• Bachelor's degree in Electrical Engineering, Controls Engineering, Automation Engineering, Computer Engineering, Mechatronics, or a related technical field; equivalent relevant experience may be considered.
• Experience programming and troubleshooting industrial PLC systems.
• Experience working with HMI or SCADA applications.
• Understanding of industrial control systems, electrical controls, instrumentation, and automation.
• Ability to read and interpret electrical schematics, wiring diagrams, P&IDs, control drawings, and technical documentation.
• Experience troubleshooting digital and analog signals, sensors, transmitters, actuators, valves, motors, and related field devices.
• Understanding of PLC I/O architecture, control logic, alarms, interlocks, and sequencing.
• Strong analytical, troubleshooting, and problem-solving skills.
• Strong documentation and technical communication skills.
• Ability to coordinate with engineering, construction, maintenance, vendors, and field personnel.
• Ability to work independently and collaboratively in a fast-paced project environment.
• Ability to support field commissioning and troubleshooting activities as required.

Preferred Qualifications

• Experience supporting semiconductor manufacturing, chemical delivery systems, cleanrooms, process facilities, or high-tech manufacturing environments.
• Experience with Allen-Bradley / Rockwell Automation PLCs , including ControlLogix or CompactLogix platforms.
• Experience with Studio 5000 / RSLogix 5000 .
• Experience developing or supporting FactoryTalk View , Wonderware, Ignition, WinCC, or similar HMI/SCADA platforms.
• Experience with chemical distribution systems, chemical delivery equipment, valve manifold boxes, process piping, or bulk chemical systems.
• Experience with semiconductor facility systems and equipment startup or commissioning.
• Familiarity with instrumentation such as pressure transmitters, flow meters, level sensors, temperature sensors, leak detection systems, and control valves.
• Experience with Ethernet/IP, Modbus, OPC, BACnet, DeviceNet, Profibus, or other industrial communication protocols.
• Experience with VFDs, motor controls, relays, safety circuits, and control panels.
• Experience conducting FAT, SAT, commissioning, I/O checkout, loop checks, and functional performance testing.
• Familiarity with AutoCAD, AutoCAD Electrical, Bluebeam, or similar engineering and document-review software.
• Familiarity with alarm management, control-system cybersecurity, system backups, and change-control procedures.
• Bilingual English and Mandarin Chinese skills are a plus but are not required.

Skills and Competencies

• PLC programming
• Industrial automation
• Controls engineering
• HMI and SCADA systems
• Semiconductor chemical systems
• Chemical delivery and distribution controls
• System commissioning and startup
• PLC troubleshooting
• I/O checkout and validation
• Instrumentation and controls
• Electrical schematics and wiring diagrams
• P&ID interpretation
• Alarm and interlock configuration
• Industrial communication protocols
• Equipment integration
• Technical documentation
• Root-cause troubleshooting
• Cross-functional coordination
• Problem-solving
• Attention to detail
• Reliability and follow-through

Work Environment

This role supports active semiconductor, industrial, construction, cleanroom, office, and field environments. The position may require working around chemical distribution equipment, process piping, electrical control panels, instrumentation, automated equipment, and active construction or commissioning areas.

The PLC Engineer may be required to participate in equipment startup, commissioning, troubleshooting, field walkdowns, and system testing activities.

The employee must follow company and site-specific safety procedures and wear required personal protective equipment.

Benefits

• 100% employer-paid Medical, Dental, Vision, and Life Insurance for the employee
• Paid Time Off
• 401(k) Plan

Equal Employment Opportunity Statement

All qualified applicants will receive consideration for employment without regard to any characteristic protected by applicable local, state, or federal law.