About the Role:
At
Guidera O'Connor
, our Mechanical Engineers play a key role in delivering some of Western Australia's most significant water and wastewater infrastructure projects — from complex treatment plants and pumping systems through to major upgrades and new infrastructure.
We are looking for
Mechanical Engineers and Project Engineers
who want more than a desk-based engineering role.
You'll have the chance to take engineering solutions from
design and procurement through
construction, commissioning and handover, developing a genuine understanding of how complex infrastructure is designed, built and brought into operation.
Working across metropolitan Perth and regional WA, you'll join an experienced project delivery team with opportunities to take real ownership of mechanical packages, solve technical challenges on site and develop your career through increasingly complex projects and responsibilities.
As a
Project Engineer – Mechanical
, you'll work closely with the Project Manager, construction teams, designers, suppliers and subcontractors to safely deliver projects in accordance with contractual, technical, programme and quality requirements.
More specifically, you will:
Manage mechanical engineering packages from design through to installation, commissioning and handover
Review designs, drawings, specifications and technical documentation to ensure constructability and compliance
Coordinate the procurement of mechanical equipment, materials and specialist packages
Work directly with suppliers, subcontractors and construction teams to resolve technical and site issues
Support the planning and delivery of mechanical installation works, including pumps, pipework,



valves, treatment equipment and associated systems
Provide engineering support during construction, testing and commissioning
Assist with project programming, cost control, forecasting and commercial management
Manage QA documentation, inspections, ITPs, technical queries and project close-out requirements
Build strong working relationships with clients, consultants, suppliers and subcontractors
Contribute to the safe, environmentally responsible and successful delivery of projects
This is an opportunity to build your career with a specialist infrastructure contractor, gaining hands-on experience across the complete project lifecycle while helping deliver critical water infrastructure across Western Australia
You Will Bring:
Experience in project delivery, construction or a related engineering environment A degree or relevant qualification in Mechanical Engineering
Strong mechanical engineering knowledge with a practical, solutions-focused approach
The ability to manage competing priorities and deliver to project deadlines
Strong communication skills and the ability to build relationships with clients, subcontractor, suppliers and project teams.
Water and wastewater experience is advantageous, but not essential
About Guidera O'Connor




From desalination plants providing clean water to Australian communities, to treatment facilities that return wastewater safely to the environment, Guidera O'Connor designs and delivers tailored solutions that make a real difference to people's lives.
We design, construct and commission water treatment plants, pumping stations, filtration systems, odour control systems, desalination plants, aquifer storage and recovery systems and water reuse systems.
Our Benefits:
Additional annual leave for service milestones and 15 days personal leave
Excellent employee referral bonus
Regular celebrations of success
Company funded wellbeing program supporting your health and wellbeing goals
Paid parental and cultural leave
Our Commitment to Diversity, Inclusion and Belonging
At Guidera O'Connor, we respect and value a diverse, inclusive, and welcoming workplace.
We strongly encourage applications from people of all genders, ages, cultures, and backgrounds.
We are committed to reconciliation and strongly encourage applications from Aboriginal and Torres Strait Islander peoples for all positions.
We are also committed to making meaningful progress toward gender equity within the engineering and construction industry and strongly encourage applications from women for all positions.
JOIN US
Please apply online.
For more information about this opportunity, contact our recruitment team at
******
.
Please note that applications will only be accepted from candidates with full Australian working rights.
A pre-employment medical assessment, including a drug and alcohol screen, will be required for all positions.

📌 Mechanical Project Engineer (Perth)
🏢 Guidera O'Connor
📍 Perth