Melchor Karratha is an award-winning contractor comprising industry specilaists in multiple disciplines across the Mining, Oil & Gas, Marine & Construction industries.


With capabilities in mechanical, electrical, hydraulics and fire expertise, Melchor MEP in Karratha is able to undertake projects of all sizes and complexity. Each specialism provides a full end-to-end service, encompassing all facets of project design, construction and maintenance.

We design, construct, install and commission HVAC and refrigeration systems for commercial and industrial properties in the Karratha area. We incorporate best quality materials to ensure the longevity of your system. To view our specific areas of expertise, please click on the headings below.


  • Gas Fired Boilers and Heat Exchangers
  • Evaporative Condensers and Coolers
  • Chilled and Heating Water Pipework
  • Ventilation Systems
  • Exhaust Fan Systems
  • Dust Control and Specialised Exhaust Systems

  • Split System Air Conditioners
  • Chilled Water Air Conditioning Systems
  • Ducted Air Conditioning Systems
  • VRV or VRF Air Conditioners
  • Inverter Air Conditioners
  • Medical Gas Systems and Associated Pipework

  • Air Handling Systems
  • Cooling Towers and Water Treatment Systems
  • Mechanical Switchboards
  • Control Plants
  • PLC (Programmable Logic Controller) Systems


Typical Karratha and Pilbara based projects include cold store systems design for food storage, dual-stage cascade systems and low-temperature systems using environmentally friendly refrigerants. Our technical expertise includes;

  • Large Cool Rooms and Freezers
  • Heavy Transport/Mobile Refrigeration and Air Conditioning Systems
  • Industrial and Commercial Ice Machines
  • Hotel Refrigeration and Air Conditioning Systems

Design Services
Melchor’s in-house design engineers based in Karratha are highly qualified and have a wealth of experience in the industry. The team generate innovative design solutions for projects of all sizes, with an emphasis on increasing efficiencies, creating the safest environment and implementing the most reliable system for that particular project.

We pride ourselves on finding functional solutions, using some of the most advanced computer-based design tools available, such as 5D modelling and Building Information Modelling (BIM). With fundamental engineering principles underpinning all our design solutions we utilise design tools such as AutoCAD, MEP, Carrier Hap, Camel and Psychometric analysis, MS Projects and Primavera.

Melchor’s Arctick number is AU 37095

Melchor Karratha is able to design, install and commission every aspect of high voltage, low voltage and extra low voltage electrical systems. We maintain a significant resource base that covers all facets of the industry. By Using an integrated service approach, we have the capability to undertake a variety of technical responsibilities on projects of all sizes, including specialty services, to meet your project’s individual needs.

Electrical Services

  • Electrical Construction
  • Lighting and Power Installations
  • Emergency Lighting
  • Generator and Backup Systems
  • High Voltage Infrastructure and Cabling Systems
  • Lightning Protection
  • Switchboards and Metering Alterations
  • Building Tenancy Refurbishments

  • Computer Room Power Installations
  • Energy Management Systems
  • Audio Visual Systems
  • Access Control Systems
  • Building Occupant Warning Systems
  • CCTV (Closed Circuit Television) Systems
  • Fire Detection & EWIS
  • Intelligent Automated Lighting Systems

  • Intercom System
  • MATV (Master Antenna Television) Systems
  • Nurse Call Systems
  • Public Address Systems
  • Security Systems
  • Switchboard Manufacture
  • UPS Systems
  • People Counting Systems

Communication Services

  • Blown Fibre Solutions
  • Cat 5e, Cat 6, Cat 6a, Cat 7 & Cat7a
  • Data Centres/Disaster Recovery Centre
  • Design and Construct Services
  • Infrastructure Audits
  • OM1, OM3 and OS1 Fibre Optic Solutions

  • Power over Ethernet
  • Patch by Exception
  • SCADA Systems
  • Testing and Certification
  • Wireless Access Points

  • Lighting Control Systems
  • Lighting Efficiency Analysis and Upgrades
  • Ongoing Energy Monitoring
  • Power Analysis and Data Logging
  • Power Factor Correction

Design Services
Melchor’s Karratha in-house team of electrical engineers are highly skilled in their field and use the latest technology to ensure world class design is achieved across all project demands. We offer a comprehensive engineering service with a focus on enhancing functionality, reducing delivery time, providing cost savings and reducing environmental impact. Our design services enables us to mitigate scope gaps and design errors through our hands on engineering expertise.

With the increased demand for sustainable and energy efficient systems, Melchor design projects to comply with all regulations and the Australian Green Start Rating (ABGR) systems.

Melchor’s Electrical Contractor number is EC 7994 (Electrical)

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Melchor Hydraulics strives to provide a quality service for the plumbing industry in Karratha and the Pilbara area. We pride ourselves on providing a one stop service to our customers in and around Karratha with the ability to design projects and follow them all the way through construction and handing over a quality product. We have an in-depth understanding of the main aspects of our industry, including, but not limited to: sewerage; stormwater; water and gas. We have the ability to successfully provide installation from small commercial to large scale.


  • Design & Estimating
  • Gas Installations
  • Water Recycling Systems
  • Water Installations
  • Sewerage & Drains
  • Storm Water
  • Repairs & Maintenance

Melchor Contracting offers a diverse range of services across the industrial markets in Karratha and the Pilbara region. This includes Civil, Electrical & Instrumentation and Power.

Our Civil division is led by a team of industry leaders who are experts in their field with a stable direct employed blue-collar workforce of over 200. We offer full structural concrete package capability, including detailed earthworks, reinforcement fixing, formwork and concrete placement.

Our Electrical & Instrumentation (E&I) team provides services to the Oil & Gas, Mining & Resources, Grain and Wastewater industries across Karratha and the Pilbara area. We have the capacity to supply, install, maintain and calibrate E&I equipment throughout a range of different processes.

CivilElectrical And Instrumentation

Melchor offers full structural concrete package capability, including detailed earthworks, reinforcement fixing, formwork and concrete placement for projects in Karratha and the Pilbara region.

Our meticulous standard of work and proactive approach to all situations is founded on our teams years of experience, providing first-class service on some of the largest infrastructure projects in Australia.

Civi Engineering Services

  • Detail Earthworks
  • Precast Installation
  • Precast Construction
  • Concrete Placement

  • Concrete Finishes
  • Formwork
  • Formwork Design

  • Reinforcement Fixing
  • MSE Wall Construction
  • Noise Walls

Melchor offers full coverage of Electrical Instrumentation Greenfield and Brownfield installation through to commissioning and final handover within Mineral and Petrochemical Process Plants in Karratha and the Pilbara region.
Our thorough standard of work and proactive approach to all situations is founded on our teams experience, providing first-class service at any level.

Electrical & Instrumentation Services

  • Maintenance of E&I works (Brown Fields)
  • Construction of E&I Major and Minor Works (Green Fields)
  • Technical Support to Integrated Services and Major Projects

  • Calibrations of Clients Process Instruments
  • Fully Compliant Hazardous Area Exd Inspections with Qualified Inspectors
  • QA Procedures – Compliant to Australian Standards

  • Commissioning Cold through to Hot
  • Full System and Process Handover

Melchor's Commercial Services & Maintenance Capabilities

Because we have teams based locally to Karratha and the Pilbara region, our experienced service & maintenance personnel responds rapidly to your requirements and undertakes multiple jobs simultaneously. Quality and Safety are ensured as we work closely with you to have your business optimally performing.

We are experienced in maintaining both mechanical and electrical systems and service the following systems:

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    Electrical And Power Systems
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    SCADA Systems
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    Plant Shutdowns
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    Air Conditioning

Innovative, Safe and Cost-Effective Access Solutions

Melchor Access’ fully IRATA trained and certified technicians specialise in managing complicated access issues for our commercial, mining, oil & gas, resources and marine clients in and around Karratha and the Pilbara region.

We regularly deploy our working at heights and access teams to work on:

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    External building maintenance and repairs
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    External window and building cleaning
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    Waterproofing and painting systems
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    Structural integrity inspections and repairs
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    Difficult access and high-risk operations
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    Post construction cleans and defect repairs
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    Shutdown and maintenance operations
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    Industrial and regional operations
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    Offshore, wharfs and operations over water
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    Construction and maintenance
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    High-risk operations

How to Contact Melchor Karratha

Melchor also has offices in Perth, Port Hedland and Broome

Send Melchor Karratha an Email

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Melchor Karratha provide our services to companies across a multitude of industries Including, but not limited to:

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    Health Care
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    Mining and Resources
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    Multi-storey Office Blocks
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    Offshore Oil and Gas
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    Oil & Gas
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    Renewable Energy
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    Residential Apartments
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Our team of dedicated individuals are committed from beginning to end. We aim to exceed expectations of all stakeholders.