Are you a driven Master Plumber seeking to build a meaningful career with a leading Australian company? McMahon Services, a privately-owned leader in construction, industrial and environmental services, is looking for a talented Plumbing Site Manager to join our Building & Construction team.

About Us McMahon Services is one of Australia's largest privately-owned construction, industrial and environmental services organisations, employing over 1,000 people nationally. We operate across metropolitan and remote locations, delivering high-quality outcomes through strong relationships, integrity, and a long‑term approach to our people and projects.

We don’t just hire for projects we invest in careers. Our team culture is team-oriented, supportive, and safety-focused, with genuine opportunities for professional growth and development.

About The Role We are seeking an experienced Master Plumber to join our Adelaide team as a Plumbing Site Manager. This is a hands‑on leadership role where you will lead from the front, drive high standards on‑site, and contribute to the continued growth of our plumbing division.

Reporting to the Operations Manager, you will be responsible for delivering plumbing projects safely, on time, and to a high standard, while mentoring teams and supporting business growth.

Key Responsibilities

Lead and supervise site-based plumbing teams across commercial projects

Drive a strong safety culture and ensure compliance with all statutory and company requirements

Coordinate labour, materials, and equipment to optimise project delivery

Maintain quality control across all stages of works

Read, interpret and manage drawings, specifications, and design changes

Build strong relationships with clients, subcontractors, and internal stakeholders

Contribute to continuous improvement and development of the plumbing business





About You

Master Plumber qualification, current driver’s licence, and White Card

Minimum 5+ years’ experience in a Site Manager role within commercial plumbing

Strong experience across commercial plumbing systems including hydraulics, fire services, hot water systems, TMVs, water filtration and tempering systems

Proven ability to plan, coordinate and manage materials, tools, and site resources efficiently

Solutions focused mindset with a strong understanding of compliance, standards, and best practice

Experience working on complex or large-scale commercial and/or civil projects (desirable)

Proficient in digital tools including Procore, Microsoft Office (Excel, Teams, Outlook)

Strong leadership, communication, and problem‑solving skills

Flexibility to travel to regional projects when required

Ability to pass pre‑employment medical, including drug and alcohol testing

What We Offer

Long-term career development with pathways into senior leadership roles

Opportunity to work with a highly skilled national team

Company vehicle, laptop, and mobile phone

Supportive, family‑oriented culture where people come first

Ongoing training and professional development

Uniform and PPE provided

If you’re a motivated leader looking to take the next step in your career and help grow a high-performing team, we’d love to hear from you.

No Recruitment Agencies please

At McMahon Services, we embrace diversity and inclusion as fundamental values. We believe that a diverse workforce fosters innovation, creativity, and a deeper understanding of the communities we serve. We are committed to creating an inclusive environment where all employees feel valued, respected, and empowered to contribute their unique perspectives and talents. We encourage applications from people of all backgrounds.

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📌 Plumbing Site Manager (Adelaide)
🏢 Mcmahon Services
📍 Adelaide