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Valar Atomics · 16 hours ago

Senior Rockwell / Allen-Bradley PLC & HMI Programmer

Hawthorne, CA

Full-time

Onsite

Senior Level, Lead/Staff

8+ years exp

Valar Atomics is seeking a Senior Rockwell/Allen-Bradley PLC & HMI Programmer responsible for the design, programming, commissioning, and lifecycle support of industrial control systems. This role will lead automation efforts for complex process systems, ensuring safe, robust, and maintainable control architectures.

EnergyNuclearOil and GasPower Grid

Responsibilities

Develop, test, and deploy PLC logic in Studio 5000 Logix Designer, including:

Structured Text, Ladder Logic, Function Block, and SFCs

Safety logic in GuardLogix (SIL-rated systems) aligned with IEC 62061 / IEC 61511 / ISA-84 preferred

High-reliability analog and digital I/O processing

Integration of CompactLogix 5069-series and 5094-series distributed I/O over EtherNet/IP

Architect control strategies for continuous and batch processes, motion systems, and interlock logic

Manage CIP connections, task scheduling, buffer sizing, UDT/ADD-ON instruction development, and diagnostics

Develop operator interfaces in:

FactoryTalk View SE / ME

FactoryTalk Linx / Studio / ViewPoint

Implement high-reliability graphics, alarming, historian integration, and navigation

Ensure HMI standards for clarity, usability, ISA-101 compliance, and system maintainability

Design and configure EtherNet/IP networks

Integrate OPC-UA/DA servers, Modbus TCP gateways, and third-party instrumentation

Troubleshoot network latency, connection limits, and performance issues

Integrate field instrumentation including flow, pressure, temperature, level, and analyzer signals (4–20 mA, HART, RTDs, high-temp transmitters, SIL-rated devices)

Support loop checkout, I/O calibration, FAT, SAT, and commissioning activities

Read and interpret P&IDs, electrical schematics, Loop Sheets, and cause-and-effect matrices

Lead automation design from requirements through commissioning

Work cross-functionally with mechanical, electrical, process, and safety teams

Prepare functional specifications, control narratives, and test documentation

Provide mentorship to junior engineers and technicians

Manage scope, schedule, and deliverables for automation segments of the project

Diagnose complex PLC/HMI issues, network faults, and field wiring problems

Support root cause failure analysis (RCFA)

Implement system improvements for reliability, cybersecurity, and performance

Qualification

Rockwell PLC programmingFactoryTalk HMI systemsControlLogix/CompactLogixIndustrial networkingStudio 5000GuardLogix safety controllersEtherNet/IP configurationTroubleshootingRoot cause analysisProject managementMentorship

Required

Bachelor's degree in Electrical Engineering, Computer Engineering, Mechatronics, or related field (or equivalent experience)

8+ years of hands-on experience programming Rockwell PLCs and FactoryTalk HMI systems

Deep proficiency with: Studio 5000 (v30+), ControlLogix / CompactLogix (5069-L3xx, L8x preferred), GuardLogix safety controllers, 5069 & 5094 I/O platforms, FactoryTalk View SE/ME, FactoryTalk Linx, FactoryTalk Studio

Strong understanding of industrial networking (EtherNet/IP, Stratix configuration)

Experience integrating VFDs, servo drives, intelligent MCCs, remote I/O, and industrial sensors

Preferred

Experience in one or more of the following industrial sectors: Gas systems (hydrogen, helium, natural gas, industrial gases), Chemical processing, Power generation (including nuclear research/test facilities), Thermal and high-temperature systems

Knowledge of IEC 61511 / ISA-84, SIL verification, and Safety Instrumented Functions

Experience with historians: FT Historian, PI, Canary Labs, Ignition

Experience with virtualization (VMWare, Hyper-V), Rockwell Patch Manager, version control (FactoryTalk AssetCentre or Git-based workflows)

Cybersecurity standards (ISA/IEC 62443)