Principal Instrumentation & Control Systems Engineer

WorleyParsons; Monrovia (CA); On-site; USD 160,000 - 235,000; Full time

Job summary

Worley seeks a Principal Instrumentation Controls Systems Engineer in Monrovia, CA to lead detailed I&C design and support for projects. You will deliver instrumentation and controls engineering across medium to mega projects, coordinate with multi-disciplinary teams, ensure safety, and uphold quality and schedule requirements.

The role emphasizes control strategies, PLC/DCS programming, I/O lists, and vendor coordination.

Qualifications

• Accredited engineering degree with related discipline and at least 12 years of experience.
• Strong knowledge of instrumentation, control deliverables, and industry codes.
• Experience with ARAMCO SAES standards and refinery/gas processing facilities.
• PE registration preferred or ability to obtain license.

Responsibilities

• Provide instrumentation and controls system engineering services on medium to mega projects with technical team oversight.
• Ensure designs meet quality, cost, and schedule requirements while maintaining safety.
• Interpret client specifications and coordinate with other disciplines and the client.
• Develop control logic and hardware/software integration for process control automation.
• Support procurement, construction, and commissioning activities as needed.

Skills

P&ID Design

Loop Drawings

Wiring Diagrams

PLC/DCS/HMI

SPI Software

ARAMCO SAES

Control Narratives

I/O Lists

Safety Standards

Instrumentation Calibration

Education

Accredited Engineering Degree (Electrical/Mechanical/Chemical)

PE License preferred

Tools

MS Office

AutoCAD

Flow/Size Software

Job description

Job Description - Principal Instrumentation & Control Systems Engineer (MON015J)

Principal Instrumentation & Control Systems Engineer - MON015J

Company : Worley

Primary Location

USA-CA-Monrovia

Job

Instrumentation and Controls

Schedule

Full-time

Employment Type : Employee

Job Posting

Sep 10, 2026

Unposting Date

Oct 26, 2026

Reporting Manager Title : Electrical Engineering Department Manager

About us

Worley is a global company of energy, chemicals and resources experts headquartered in Australia. We partner with our customers to deliver projects and create value across the life of their assets. We specialize in consulting, engineering, procurement and construction across the project lifecycle, with services extending through to operations and decommissioning. Leveraging extensive experience and AI-enabled delivery, we support customers in navigating complexity as they meet today's needs and transition to more sustainable solutions.

Purpose:

We are currently seeking a Principal Instrumentation Controls Systems Engineer to join our Worley team in Monrovia, CA. As a part of the team, your core responsibility will be to provide detailed Instrumentation Controls Systems engineering design and support the project team from a technical perspective.

Responsibilities:

• You will provide instrumentation and controls system engineering services on medium, large, or mega projects to Worley' and its customers, including technical support and supervision within the instrumentation and controls engineering team.
• Ensure all engineering and design work performed meets quality, cost, and schedule requirements.
• Ensure all design work is safe and carried out in a safe manner.
• Ensure all design work conforms to the codes and standards used by the client, or to agreed industry standards.
• Perform designing/engineering work/deliverables as part of the Instrumentation & Controls team.
• Ability to interpret client specifications.
• Coordinate/Communicate with other disciplines and the client.
• Quality Assurance – Responsible for working within the provisions and guidelines of the Worley Quality Assurance system.
• Identify issues and problems, develop appropriate solutions, and ask for assistance when required.
• If required, assist and support junior personnel within the instrumentation & controls engineering team.
• Keep up to date with the latest developments and technical innovations in instrumentation & controls engineering.
• If required, function as instrumentation & controls engineering Lead on specific projects.
• If required, provide assistance and advice during procurement, construction, and commissioning activities.

What you will bring

Technical/Industry Experience and Qualifications Requirements:

• Working knowledge of Instrumentation & Control deliverables such as:
  • Panel (JB and Marshalling) Design.
  • P&ID's.
  • Loop Drawings.
  • Wiring Drawings.
  • Motor Control Schematics.
  • Instrument Location Drawings.
  • Instrument Installation Details.
  • Instrument Specifications (Datasheets).
  • I/O Lists.
  • Bill of Materials.
  • Conduit/Cable Tray/Cable Schedules.
  • Control Narratives and Strategies, algorithms.
  • Develop and implement control logic (in PLCs, DCS, other software).
  • Hardware and software integration for process control automation.
  • Cause and Effect Diagrams / SIF List and consequences.
  • Material Requisitions.
• Construction or Engineering Work Packages. Working knowledge of Instrumentation Calculation/Selection, such as:
  • Flow (Orifice Plates, Vortex, Venturi, Magnetic, Ultrasonic meters).
  • Level Measurement (Radar, Displacers, Gauges).
  • Temperature (including Thermowells Freq. wake calculation).
  • Pressure.
  • Process Analyzers and sampling systems would be a plus.
  • Competent use of instrument calculation/selection specific software.
• Working knowledge (design/configuration/implementation) of the following systems:
  • PLCs, SIS, DCS, CCS, VMS/CMS, Historian, IAMS, Alarm Management System, Training / Operator Straining Simulator, Wireless System, and IOT Network design from reputable vendor / manufacturer.
  • HMI, SCADA, Telecommunications, Cybersecurity.
  • Working knowledge of industry standards and codes related to Instrumentation & Control system deliverables.
  • Being able to work with multiple and concurrently small and medium projects.
  • Working knowledge of Computer-Aided Design software.
  • Working knowledge of SmartPlant Instrumentation (SPI) software, Flowmeter calculation/ sizing, and control valve sizing calculation.
  • Working knowledge (design/implementation) of Communication Networks is a plus.
  • Competent use of relevant software such as MS Office Suite.
• SmartPlant Instrumentation (SPI) software training (including wiring module) is a plus.
• ARAMCO Experience: Well versed and experienced with ARAMCO SAES standards.
• Knowledgeable in Refinery, Gas Compression and Gas processing facilities.

Additional Information:

• This role is based in the Monrovia CA Worley office locations and not eligible to support remotely.
• May be required to travel to the vendors facilities.
• Salary Range $160,079-$235,411.
• Los Angeles: We will consider for employment all qualified Applicants, including those with Criminal Histories, in a manner consistent with the requirements of applicable state and local laws, including the City of Los Angeles' Fair Chance Initiative for Hiring Ordinance.” #LI-AC1.

Education – Qualifications, Accreditation, Training:

Required:

• Accredited Engineering Degree in General Engineering, Chemical Engineering, Electrical Engineering, or Mechanical Engineering or related equivalent degree combined experience Typically, twelve years’ experience.

Preferred:

• 12+ years of direct Instrumentation & Controls System design and engineering experience.
• Registered PE in Control Systems is preferred or ability to obtain license.
• Functional Safey Engineer (FSE) certification.
• Oil and Gas industry experience.
• Water treatment, power generation, data centers.

Moving forward together

We want our people to be energized and empowered to drive sustainable impact. So, our focus is on a values-inspired culture that unlocks brilliance through belonging, connection and innovation. We're building a diverse, inclusive and respectful workplace. Creating a space where everyone feels they belong, can be themselves, and are heard.

And we're not just talking about it; we're doing it. We're reskilling our people, leveraging transferable skills, and supporting the transition of our workforce to become experts in today's low carbon energy infrastructure and technology. Whatever your ambition, there's a path for you here.

And there's no barrier to your potential career success. Join us to broaden your horizons, explore diverse opportunities, and be part of delivering sustainable change.