G&S’ Underground division is a leading provider of mechanical, electrical and structural maintenance services to the underground mining industry, with these services delivered across four key pillars: Longwall equipment, Development equipment, Spare parts and Site Services.

G&S’ Underground team have developed and operate under a clear mantra of being the “Safest set of hands” for their clients and in doing so, consistently deliver superior performance outcomes.

The safest set of hands mantra is based on the following 5 principles:

  1. We do not hurt anyone or expose them to harm on or off-site;
  2. We do what we say we will do and meet schedule timelines or better;
  3. Through a relentless focus on quality we maximise post overhaul/project availability;
  4. We put the customer first, we are agile and we over-communicate;
  5. We sustain our competitiveness through a focus on innovation and continuous improvement.
Key Services
  • Minor and major overhauls, including full AS3800, accredited hazardous areas
  • Component refurbishment
  • Component re-engineering
  • Spare parts supply
  • Technical support
  • Conveyor installations
  • Outbye services
  • Project management
Equipment and Service Types


  • Armoured Face Conveyors (AFC)
  • Beam Stage Loaders (BSL)
  • Bootends
  • Monorails
  • Roof Supports
  • Pump Stations
  • Gearboxes (inc. CST’s)
  • Rehosing
  • DCB’s


  • Continuous Miners
  • Shuttle Cars
  • Feeder Breakers
  • Gearboxes

Spare Parts

  • Aftermarket Spares
  • Re-engineered Components
  • Longwall and Development
  • Breakdown and after-hours support

Site Services

  • Conveyor Installations
  • Outbye Services
  • Onsite overhauls

Featured Projects

Daunia Mine

G&S Engineering was engaged to undertake the Structural, Mechanical, Piping and Electrical Instrumentation (SMP&EI) installation of the...


G&S Engineering undertook maintenance repairs on Reclaimers RC1P and RC2P for Rio Tinto.

Oaky North Mine

G&S Mackay workshops undertook the first full Overhaul of a Glencore Oaky North Mine 12CM30 Joy Continuous Miner.