Mechanical Engineer (Water) - ADL

About Us:

For over 35 years, GPA Engineering has been a trusted, Australian-owned consultancy delivering engineering, procurement and construction management services across water, energy, renewables, defence, mining, and hydrogen. We develop and implement projects that drive critical infrastructure and support industries across Australia.

With offices nationwide (Adelaide, Brisbane, Perth, Melbourne, Sydney, Darwin) and a reputation for technical excellence, our strength lies in our people. We bring together diverse, motivated professionals who value teamwork, integrity, safety, and sustainability. At GPA, you’ll find the scale and expertise of a leading consultancy, combined with the supportive culture of a close-knit team.

About the Role:

We are seeking a highly capable Mechanical Engineer with proven experience in the water industry, ideally with focus on design projects. We are specifically looking for someone who brings deep expertise in water technology and treatment processes to complement and strengthen our existing engineering team.

In this permanent, full-time role based in our Adelaide office, you will contribute to the design, development, and optimisation of mechanical and process-related systems across both potable water and wastewater treatment applications.

In this role, you will:

• Participate in mechanical design activities for potable water and wastewater treatment projects.
• Develop engineering documentation including specifications, data sheets, drawings, and calculations.
• Provide insight into treatment processes such as filtration, chemical dosing, and UV systems.
• Participate in project engineering activities including design coordination, vendor engagement, and technical reviews.
• Ensure compliance with relevant industry standards, quality requirements, and environmental regulations.
• Collaborate effectively with process, civil, and project engineering teams to deliver integrated solutions.

To be successful in this role, you will bring a passion for quality engineering, strong attention to detail, and a commitment to achieving excellent client outcomes. We are seeking candidates with the following qualifications and capabilities:

• Strong knowledge of water technology, including treatment processes and mechanical equipment used in water facilities.
• Experience in the water industry, ideally with a focus on design projects.
• Demonstrated project engineering capabilities.
• Knowledge of relevant codes, standards, and specifications for mechanical equipment.
• Australian-recognised Mechanical Engineering degree (essential).
• Excellent communication skills, teamwork, and effective management of time, budget, and priorities.
• Proficiency with engineering and design software (e.g., AutoCAD, SolidWorks).
• Strong analytical abilities and attention to detail.
• Experience in potable water treatment, including filtration, chemical dosing (disinfection and pH control), and UV dosing (highly desirable).
• Experience in wastewater (sewerage) treatment, including aerobic/anaerobic processes and chemical dosing for disinfection (advantageous).

We understand that every candidate’s value is unique, and every individual brings their own set of skills and knowledge beyond just the role description, be that with broader technical interest and analytical skills or interest in company strategy and front-end advisory. So if you feel like you don’t have everything listed below, we’d still like to hear from you if you love engineering, like working with great people and seek professional growth.

A requirement for this role is to complete a satisfactory pre-employment medical check and Australian police clearance.

How to Apply

Applications must be submitted via the online recruitment system before COB 19th January 2026.

If you require adjustments to the recruitment process to support your application, you may email us at HR@gpaeng.com.au.

Please Note: This role is subject to an extended recruitment timeline due to our upcoming company shutdown. All applications received by the closing date will be reviewed, and shortlisted candidates will be notified prior to the Christmas break. Interviews, however, may be scheduled after operations resume in early January

What we offer:

At GPA, we want our people to thrive - both professionally and personally. We’re big enough to deliver complex, high-profile projects, yet small enough that you’ll always feel valued and supported.

• Competitive Salary & Rewards - a fair and attractive compensation package with paid overtime, recognising the value of the work you put in.
• Career Growth & Development - structured progression pathways, company-sponsored training, and support towards professional membership and Chartership.
• Flexibility - hybrid working options and cultural leave swap days, because we know work-life balance matters.
• Health & Wellbeing - wellbeing programs, confidential EAP support, and a culture that genuinely looks out for each other.
• Family-Friendly Benefits - paid parental leave for both primary and secondary carers, plus policies that support every stage of life.
• Community & Culture - a workplace that values connection and fun, from weekly sports teams and fitness clubs, through to social events like cinema nights, family BBQs, quiz nights, and celebrations of diverse cultural traditions.
• Giving Back - a strong commitment to charity, with GPA donating over $3 million directly to charitable organisations.
• Diversity & Inclusion - a team where different perspectives are respected and collaboration drives better outcomes.

At GPA, you’ll be joining a workplace that combines the professionalism of a leading consultancy with the warmth of a supportive, people-first culture. We’re proud that over 80 of our team members have been with us for more than 10 years – a testament to the career growth and long-term commitment fostered here.  Hear directly from our team and explore their experiences in our employees’ testimonials: https://www.gpaeng.com.au/careers/

We welcome applications from people of all backgrounds, experiences, and identities – including (but not limited to) Aboriginal and Torres Strait Islander peoples, people of all ages, cultures, ethnicities, gender identities, sexual orientations, neurodiversity, and those with disabilities. If you require adjustments to the recruitment process to support your application, you may email us at HR@gpaeng.com.au.

Disclaimer to Recruitment Agencies:

Please be advised that GPA Engineering does not accept resumes submitted by third-party recruitment agencies. All job applications must be submitted directly by the candidate through our official career portal or via direct contact with our HR team. We will not be held liable for any fees or claims from recruitment agencies regarding unsolicited resumes or candidate submissions. We appreciate your understanding and cooperation.