Instrumentation & PLC Technician

Enginuity Global

17d•Hybrid

About The Position

We are seeking an experienced Instrumentation & PLC Technician for a hybrid automation and field instrumentation role in Midland, TX, supporting Saltwater Disposal (SWD) systems and other oilfield automation infrastructure. This position operates on a 14-on/14-off rotational schedule and requires strong working knowledge of Allen-Bradley PLCs, HMI systems, and Modbus communication, along with deep familiarity with oilfield instrumentation used in fluid handling and injection systems.

Requirements

High School diploma or equivalent
Associate degree or technical certification in Instrumentation, Industrial Automation, or Electrical Technology
3+ years of experience with oilfield instrumentation and controls
Hands-on experience with:
Modbus RTU/TCP, RS485, Ethernet/IP
Allen-Bradley PLCs and FactoryTalk HMI software
Level/flow/pressure instrumentation in SWD or water management systems
Proficiency in reading and interpreting P&IDs, loop drawings, ladder logic, and wiring diagrams
Ability to work independently at remote well sites and disposal facilities
Must be able to work a rotating schedule of 14 days on, 14 days off that may include nights and weekends during active shifts
Stable work history
Must be legally eligible to work in the US. Sponsorship is not available
Must be able to pass a background check; drug and alcohol screening
Must have a valid driver’s license with a good driving record
Must be able to comply with customer site requirements for access/entry
Must have a TWIC card
Ability to lift 50 pounds regularly
See, respond, and report to possible dangerous situations
Comfortable with heights and able to climb stairs/ladders
Work in confined spaces
Operating and driving a vehicle for extended periods of time on possible rough terrain
Sitting for extended periods. Bending, reaching, kneeling, and use of a step ladder at times
Ability to work in inclement weather and/or extreme weather-related conditions
Required to wear PPE/Safety gear at specific times
Ability to wear an N-95 mask when required

Nice To Haves

Experience with SCADA platforms (Ignition, ClearSCADA, etc.)
VFD setup and tuning for pump control
Familiarity with telemetry systems, wireless radios, and cellular RTUs
Understanding of saltwater disposal regulatory requirements and spill prevention systems

Responsibilities

Install, calibrate, troubleshoot, and maintain a wide range of field instruments including:
Pressure transmitters and switches (injection, suction, casing pressure)
Level sensors (ultrasonic, guided wave radar, differential pressure)
Flow meters (Coriolis, magnetic, turbine for water and oil measurement)
Temperature sensors and RTDs
Tank level monitoring systems
VFDs (Variable Frequency Drives) used in pump control systems
Perform PLC programming and diagnostics on Allen-Bradley systems including:
ControlLogix, CompactLogix, MicroLogix platforms using Studio 5000 or RSLogix
Modifications for pump control, safety shutdowns, alarm systems, and tank automation
Integration of analog/digital I/O modules and remote I/O racks
Configure, troubleshoot, and maintain HMI interfaces, including:
FactoryTalk View ME/SE, PanelView Plus
Display creation for tank levels, pump operation, system pressures, and flow data
Implement and support Modbus RTU and Modbus TCP communication networks for:
RTUs, VFDs, flow meters, chemical pumps, and tank level systems
Data acquisition to SCADA systems for remote monitoring and reporting
Monitor and optimize SWD operations, including:
Automated pump control based on tank levels and injection pressures
Flow balancing between incoming trucks, produced water pipelines, and injection wells
Ensuring environmental and operational compliance with alarms and fail-safe design
Maintain detailed documentation for:
Instrument loop drawings, PLC logic, network topologies, and device addresses
Field calibration records, maintenance logs, and firmware/software updates
Provide field support to troubleshoot equipment failures, communication issues, and control system errors during active 14-day rotations.