Expert & Professional Services

Assess Orr is an Australian owned and operated business specialising in Construction, Commissioning, and Maintenance Services within the oil and gas, power generation, water, and mining sectors. Established in 2007, our highly qualified team coordinate all construction and commissioning activities, including the supply of skilled technicians, equipment, tooling, and flexible logistics solutions.

We are a one-stop shop that provides peace of mind to our clients throughout the entire construction and commissioning processes, with effortless transitioning into the maintenance phase.



Assess Orr has been involved in the construction and commissioning of Coal and Gas Fired Power Stations, Water Treatment Plants, Mining Infrastructure, Coal Seam Gas Infrastructure, and Subsea Spooling for major LNG infrastructure.

We will assess each client’s individual requirements through an in-depth quality consultation, bringing with us a wealth of experience and innovative ideas.

Our previous experience includes works on Yarnima Co-Generation Gas Fired Power Station, Darling Downs Co-Generation Gas Fired Power Station, Kenya Water Treatment Plant, numerous QCLNG Phase I and Phase II Upstream Projects, the Gorgon Project, Ichthys LNG Project, and the Ok Tedi Mining Limited Crusher Replacement Project in Papua New Guinea.

Our skilled and motivated workforce perform services to the highest of safety standards, and with a focus on quality workmanship. We are accredited to the National Code of Practice and compliant with all OH&S regulations.

The Assess Orr team can coordinate all activities, including the supply of skilled technicians, all trades, multi skilled riggers/scaffolders and operators, equipment, tooling and flexible logistics, taking the worry away from our clients and allowing them to focus on what they do best.

Our Clients

One of the most recognised and respected names in the industry our superior services include reliable and efficient heavy lifting cranage, scaffold access solutions, and commissioning of plant and equipment, from pre-commissioning right through to start up and performance testing.

Assess Orr aims to take the worry out of client managed commissioning. Our many repeat clients trust us to deliver their projects safely, on time and within budget.

Our People

Assess Orr was established in 2007, and is owned and run by Mark Orr, together with a multidisciplinary team of highly skilled Managers, Engineers, and Supervisors, supported by a qualified team of Electrical, Mechanical, Instrumentation and Commissioning Technicians.

Mark is an accredited trainer and assessor with Worksafe WA and Qld, with specialist knowledge relating to High Risk Work Licences, which covers Rigging, Scaffolding, EWP and Crane Operation. He has been involved in the construction and commissioning of major projects throughout Australia in the Mining, Power, Water Treatment, Oil, and Gas sectors.  Mark is a hands-on Director who is focused on working closely with his clients to provide a reliable, economical, and fuss free service.

Assess Orr prides itself on team performance.  As one of the most recognised and respected names in the industry, we employ highly qualified staff with proven experience, working with state-of-the-art equipment.  We invest in training, and career development, and every one of our employees is committed to quality assurance and safe work practices, working to the highest standards, in accordance with all national codes of conduct and safety regulations

Working together, we make sure we deliver on your projects.

Quick and Reliable

We are available 24/7 via email.