Together Coffey and Tetra Tech has provided specialized scientific, engineering and consulting services to industry, government and the broader community for more than 50 years. Tetra Tech offers an array of mining, energy, infrastructure and environmental services to public and private sector clients throughout the entire project life-cycle.


Tetra Tech has more than 20,000 employees located in more than 450 offices globally and according to an Industry Survey conducted by ENR (Engineering News Record) in 2019 is ranked


  • #1 in Consulting and Studies
  • #1 in Dams and Reservois
  • #1 in Environmental Management
  • #1 in Environmental Science
  • #1 in Hydro Plants
  • #1 in Solid Waste
  • #1 in Water
  • #1 in Water Treatment and Desalination
  • #1 in Water Treatment and Supply
  • #1 in Wind


Tetra Tech continues to focus on the growth of its business within the mining and resources sector. Tetra Tech is able to provide the full-range of mining services from Maiden Resource through mine Feasibility Studies, Planning, Engineering Procurement and Construction Management and full Mine Closure support.