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Job Description - Principal Instrumentation & Controls Designer (CAL01W3) Management Level: Individual Contributor:

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

The Principal Instrumentation Designer provides senior-level design leadership and technical expertise for instrumentation and control (I&C) deliverables across major projects. This role is accountable for the quality, consistency, and timely delivery of complex instrumentation design packages in support of Worley and its customers, while providing technical mentorship to design teams.

Responsibilities

Lead and deliver high-quality instrumentation design services that meet Worley, client, and applicable statutory and regulatory requirements, on time and within budget.

• You will be accountable for:
• Leading the development, coordination, and quality assurance of instrumentation design deliverables across the full project lifecycle (concept, FEED, detailed design, construction support).
• Providing technical direction and oversight to instrumentation designers and drafting teams, including task assignment, workload planning, and design reviews.
• Participating in project planning, progress reporting, and compliance with required checking and quality assurance procedures.
• Ensuring project scope is clearly defined and that changes are managed in accordance with project change management processes.
• Supporting procurement, construction, and commissioning activities, including:
• Review of requisitions and technical bid evaluations
• Input to purchase orders and vendor documentation
• Resolution of site and vendor queries
• Coordinating closely with engineering disciplines (process, electrical, mechanical, piping, and automation) to ensure fully integrated designs.
• Proactively identifying and resolving discrepancies between Worley and client design standards and requirements.
• Providing technical input into constructability, maintainability, and operability reviews.
• Supporting and mentoring junior designers and engineers, fostering technical excellence and knowledge sharing within the instrumentation team.
• Communicating effectively with project stakeholders, including clients, vendors, and construction partners.
• Identifying technical risks and issues, developing practical solutions, and escalating when appropriate.

Technical & Industry Experience

Strong working knowledge of I&C design systems, workflows, and document management tools (., SAP, KMS or similar project systems).

Demonstrated participation in process safety and operability studies (., HAZOP, LOPA) and the ability to translate outcomes into design requirements.

Solid understanding of project scope development, workshare execution, and delegation of design activities across internal and external teams.

Strong working knowledge of core Instrumentation & Control design deliverables, including:

• Junction box and marshalling panel layouts
• P&IDs
• Loop diagrams, wiring diagrams, and instrument location drawings
• Motor control and interconnection schematics
• Instrument datasheets and specifications
• I/O lists
• Bills of material
• Cable, conduit, and tray schedules
• Control narratives and philosophies
• Material requisitions
• Construction and engineering work packages

Working knowledge of instrumentation selection and application, including:

• Flow measurement (orifice plates, vortex, venturi, magnetic, ultrasonic).
• Temperature measurement (including thermowell design and frequency wake. calculations)
• Pressure