About Us

MJR Mechanical Contractors was established in 1998, with the current Managing Director, Mark Seamons, a co-founding member. With MJR originally based in Keysborough and with 4 personnel, the company had humble beginnings and aims: to provide service that comprises a deep commitment to client satisfaction and thorough ongoing support.

In 2000, as MJR continued to grow, the company relocated their offices to Hallam. This period saw a focus on development of staff and business practices, furthermore ensuring the company’s employment of the latest and most reliable techniques. Since 2006, the company has operated from their purpose-built modern premises at a new location in Hallam. MJR currently employs over 40 dedicated staff, including project managers, estimators, administrators, plumbers and refrigeration mechanics.

Project by project, the company expanded their services and employee base, attracting more clients and developing increasingly sophisticated solutions. We focus strongly on the continual training of staff and development of strategies to keep MJR at the forefront of our industry.

Today, even after experiencing such growth, MJR is still, in Mark’s own words, deeply committed to their simple goal of “providing excellence in reliability, support and client satisfaction.”

See our services


"In an environment where timeframes and budgets seem to continually tighten, it is reassuring to know that we have MJR on the team, delivering our projects.

Mark brings his extensive real-life experience to the design table, and will work with you to ensure the project criteria is achieved without unnecessary costs and without compromising the quality of the installation. Every project is different and Mark can adapt his approach to suit the varied outcomes required.

When we recently won the contract for the design and construction of a new office, production and warehouse facility with a very high proportion of mechanical work and a tight time frame, we knew that MJR needed to be involved.

Mark's onsite team knows what has to be done and they are always willing to work together with our Site Managers to ensure that programs are met, if not beaten.

The commissioning process and follow-up maintenance are of the same high standards. In fact, MJR maintains the air conditioning at our office. Over our long association, it is always a pleasure to work with MJR. Their staff are always willing to collectively find a solution, are trustworthy and reliable.

What they promise is what they deliver.

I would have no hesitation in recommending MJR."

Michael Pellicano - Managing Director of Pellicano Builders