Senior/Mechanical Engineer (Water, Wastewater) – ADL

Elmo; Adelaide; Hybrid; AUD 110,000 - 140,000; Full time

Benefits offered by this job

Competitive Salary & Rewards

Career Growth & Development

Diverse Project Exposure

Flexibility – hybrid working

Health & Wellbeing

Family-Friendly Benefits

Community & Culture

Giving Back

Diversity & Inclusion

Job summary

GPA Engineering seeks a Senior/Mechanical Engineer with a strong water and wastewater background to provide mechanical leadership across industrial projects, focusing on pumps and piping systems. You will contribute across concept through construction, with opportunities for team leadership and client management.

Ideal candidates have 4+ years of relevant experience, are comfortable in a consulting environment, and meet Australian Standards and client expectations.

Qualifications

• Strong background in industrial mechanical engineering within mining, water and wastewater industry.
• Demonstrated capability leading pumps, pipelines and piping scopes (design, reviews, vendor engagement and delivery coordination).
• Technical experience in a consulting environment – delivering brownfields projects.
• Outgoing – client facing, project engineer experience with a desire to build long term relationships with clients.

Responsibilities

• Support hydraulic system design across concept, feasibility, detailed design and construction support.
• Support project delivery of GPA’s Mechanical Team – mining, water and wastewater.
• Develop and review deliverables including datasheets, specifications, scopes of work, design reports, calculations and drawings.
• Provide technical leadership on pump selection and system design (duty/standby, hydraulics, NPSH, controls).
• Coordinate multidisciplinary interfaces (process, civil/structural, electrical/EI&C).
• Drive Safety in Design, constructability and brownfield integration.

Skills

Client facing

Communication skills

Leadership

Workload management

Pumps & piping design

Education

Australian recognised Mechanical Engineering degree

CPEng

Job description

Senior/Mechanical Engineer (Water, Wastewater) – ADL

Posted: 30/09/2026

Closing Date: 30/10/2026

Job Type: Permanent - Full Time

Job Category: Mechanical

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, Melbourne, Sydney, Darwin, Perth) 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.

Job Description

About the Role:

GPA is looking for a Senior/Mechanical Engineer experienced in the water and wastewater industry. In this role, you will provide mechanical leadership across industrial projects with a strong focus on pumps, pump stations, pipelines, and piping systems.

This is an exciting opportunity to take the next step in your career and be able to truly influence the direction and growth of the group. Potential long-term opportunities in Team Leading, Client Management and Industry involvement.

GPA is seeking candidates with +4 years of relevant experience, ideally having experience delivering water and wastewater projects. GPA’s Engineers are expected to have a range of technical and soft skills to perform the role, as listed below. Applicants with lesser experience are expected to possess some of the skills and show strong potential to build on the others.

Key Duties

• Support hydraulic system design, including typical in-line components across concept, feasibility, detailed design and construction support.
• Support project delivery of GPA’s Mechanical Team – specifically the mining, water and wastewater industry.
• Develop and review key deliverables including datasheets, specifications, scopes of work, design reports, calculations and drawings.
• Provide technical leadership on pump selection and system design (e.g., duty/standby philosophies, hydraulics, NPSH, controls/interfaces, operability and maintainability).
• Coordinate multidisciplinary interfaces (process, civil/structural, electrical/EI&C and drafting).
• Drive Safety in Design, constructability and brownfield integration.
• Mentor and uplift capability across the team and support junior engineers.
• Familiar with the relevant client and Australian Standards.
• Familiar with project estimating and leading proposals.

Desired Skills and Experience

To be successful in this role, we are seeking for candidates with passion for quality engineering and client outcomes, great attention to details, and with the following relevant experience:

• Strong background in industrial mechanical engineering within mining, water and wastewater industry (sustaining capital/brownfield experience highly regarded).
• Demonstrated capability leading pumps, pipelines and piping scopes (design, reviews, vendor engagement and delivery coordination).
• Technical experience, ideally working in a consulting environment – delivering brownfields projects
• Outgoing – client facing, project engineer experience with a desire to build long term – lasting relationships with clients
• Experience delivering work in line with Australian legislation, Australian Standards, client specifications and industry norms.
• Confidence working across project fundamentals: scope definition, cost/schedule inputs, and effective collaboration with project managers and discipline leads.
• Strong communication skills and a proactive, solutions-focused approach—comfortable engaging with clients, operations teams, contractors and suppliers.
• Ability to manage own workload across multiple projects
• Australian recognised Mechanical Engineering degree and CPEng are essential.

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

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 be known, valued and supported.

• Competitive Salary & Rewards – an attractive remuneration package, including paid overtime, recognising the value of the work you put in.
• Career Growth & Development – structured career progression, company-sponsored training, mentoring and support towards professional membership and Chartership.
• Diverse Project Exposure – opportunities to work across different industries, clients and project types, building broad technical and practical experience.
• Flexibility – hybrid working options and cultural leave swap days, supporting a healthy balance between work and life.
• Health & Wellbeing – wellbeing programs, confidential EAP support and a workplace culture that looks out for its people.
• Family-Friendly Benefits – paid parental leave for primary and secondary carers, together with policies designed to support different stages of life.
• Community & Culture – opportunities to connect beyond project work through sporting and fitness groups, social events, family BBQs, quiz nights and celebrations of diverse cultural traditions.
• Giving Back – a strong commitment to the community, with GPA having donated more than $3 million directly to charitable organisations.
• Diversity & Inclusion – a workplace where different perspectives are respected and collaboration is encouraged.

At GPA, we offer a supportive working environment where people can build long-term careers. More than 80 of our team members have been with GPA for over 10 years, reflecting the opportunities, culture and stability we aim to provide.

GPA is an equal opportunity employer and welcomes applications from people of all backgrounds and experiences.