Process Engineer

ACCIONA is a global company, leading in the development of regenerative infrastructure that creates a positive impact on society. Our workforce consists of more than 65,000 professionals, present in more than 40 countries across the five continents, all contributing in our mission to design a better planet. Are you a passionate individual who wants to make a difference, promote sustainable development, and find solutions to the biggest global challenges including climate change, overpopulation, and water scarcity? Come and join us in building the infrastructure our planet needs to achieve a sustainable future.

ACCIONA is a global leader in sustainable infrastructure and renewable solutions. Through ACCIONA Agua, we deliver large‑scale, innovative water and wastewater treatment projects that support communities and environmental sustainability across Australia.

We are currently seeking a Process Engineer to support the safe and effective delivery of complex water infrastructure projects, with a strong focus on process design for desalination and water treatment plants, and an ability to interpret and review designs for chemical process systems and planning control systems.

About the Role

Reporting to the Process Lead, the Process Engineer will contribute across both the design and delivery phases of water and wastewater projects. The role involves close collaboration with internal project teams, clients, vendors, and site personnel to ensure technical excellence, compliance, safety, and timely project delivery.

While initially based in Perth, this role may require relocation or travel to other project locations across Australia, depending on business and project needs.

Key Responsibilities

Process Design

• Contribute to conceptual, detailed, and value‑engineered process designs for large‑scale desalination and water treatment plant projects.

• Undertake process planning, modelling, and membrane simulations to support optimised and sustainable solutions.

• Prepare technical calculations, procurement specifications, technical documentation, and schedules.

• Develop and manage digital engineering information including drawing registers, transmittals, change requests, and design documentation.

• Prepare and present D&C cost estimates and design solutions to key stakeholders.

• Support tendering and business development activities when required.

Project Delivery

• Support the delivery phase by developing and coordinating project documentation, technical clarifications, site visits, and project meetings.

• Supervising systems which are subject to chemical changes within its lifecycle.

• Ensure selection, construction, and installation of process equipment aligns with approved designs and project specifications.

• Manage scoping, definition, specification preparation, and tendering during procurement phases.

• Coordinate and file project documentation including tender and contract documents, correspondence, and safety, quality, and environmental records.

• Contribute to Management Plans, Functional Descriptions, Commissioning Plans, ITPs, performance testing, and O&M documentation.

• Assist in resolving non‑critical project issues through technical analysis and recommendations.

• Liaise with multidisciplinary project teams, third parties, and ACCIONA Head Office on technical matters.

• Prepare and manage requests for quotations (RFQs) for vendor equipment.

Additional Responsibilities

• Gather and communicate relevant technical and project information effectively.

• Propose project improvements through technical modifications and optimisations.

• Prepare high‑quality client documentation, technical reports, and presentations.

• Maintain relationships with vendors and subcontractors.

• Supervise tasks of assigned team members where applicable.

• Degree in Chemical, Civil, Mechanical, Electrical, or a related Engineering discipline.

• Minimum 3 years’ experience in a comparable technical or process engineering role.

• Proven experience in process design of water, wastewater, and desalination treatment systems.

• Experience with process simulations and membrane projections.

• Demonstrated capability in preparing process calculations, PFDs, P&IDs, control philosophies, and technical specifications.

• Familiarity with digital engineering environments (e.g. BIM).

• Strong written and verbal communication skills in English, including technical report writing.

• Ability to work both autonomously and collaboratively within multidisciplinary teams.

• Experience supporting procurement, tendering, and vendor engagement.

Additional Requirements

• Valid driver’s licence recognised in Australia.

• Willingness and flexibility to travel interstate and overseas as required.