Providing quality geotechnical engineering solutions to the mining industry
Master Geotech Services, LLC.

Contact Information
7463 E Broadway Blvd 
Phone : +1-480-616-0749 , +1-480-548-3753 (Mobile)
e-mail :

Ph.D., Mining, Geological and Geophysical Engineering, University of Arizona, 2013
M.S., Mining Engineering, University of Arizona, 1998
B. Tech. (Mining Engineering), Indian Institute of Technology, Kharagpur, India, 1980

Project Experience

Principal Mining Engineer, AMEC Mining and Metals,
Mesa, AZ, USA
  • Project management and Technical Consultancy for underground mining projects
  • Geotechnical and mine design assistance for drift-and-fill mining project and Qualified Person for mining section of NI 43-101-compliant Preliminary Economic Assessment for a copper project.
  • Project management for financial evaluation of alternative mining methods for improving copper recovery from a heap leach project
Consulting Engineer, Rock Mechanics, Stantec Mining
Tempe, AZ, USA
  • Project management and Technical Consultancy for underground mining projects
  • Geotechnical training, and leading the development of mine designs and cost estimates for a pre-feasibility study of an underground gold project
  • Managing mine designs and cost estimates for a scoping study of an underground copper project, and preparation of the mining section of the NI 43‑101 Technical Report.
  • Manager for scoping-level mine design and cost estimating for a platinum project.
  • Order-of-magnitude evaluations at two production rates for the underground block cave copper mine, and overseeing the development of mine designs and cost estimates.

2008 - 
President, Master Geotech Services LLC
  • Development and delivery of an online introduction to block cave mining, and a webcast on geotechnical inputs to block cave mine design and operations.

  • Report on in-situ/primary fragmentation estimates to evaluate the feasibility of block caving below an inactive copper mine.

  • Mining support of a third-party feasibility study of developing a nickel orebody.

  • Mining section of a NI 43-101-compliant Preliminary Economic Assessment for a gold project.

General Superintendent (Underground Geotech), PT Freeport Indonesia, 
Tembagapura, Indonesia
  • Responsible for all geotech activities in the underground mining operations of PT Freeport Indonesia, including ground stability monitoring, rock mass characterization, ground support and excavation design, interaction with mine planning and operations, design and monitoring of dewatering programs
  • Responsible for geotechnical data collection for MLZ and Grasberg Block Caves
  • Design inputs provided for feasibility reports for DOZ 50K expansion, DOZ 80K expansion and Grasberg Block cave
  • Assessment of interaction between planned large mining projects in the district
  • Training of field geotechnical engineers

Rock Mechanics Engineer, Call & Nicholas, Inc, Tucson, Arizona, USA
  • Geotechnical inputs for feasibility and detailed design projects for DOZ Block Cave, ESZ Block Cave, MLZ Block Cave, Grasberg Block Cave and Kucing Liar Block Cave of PT Freeport Indonesia
  • Geotechnical inputs for pre-feasibility and feasibility design projects for Big Gossan Mine, PTFI (sub-level stoping), El Dorado Mine, Pacific Rim Mining Corporation (sub-level stoping), Tazadit mine, SNIM (sub-level stoping), Getchell Mine, Getchell Gold (drift-and-fill mining) and Turquoise Ridge Mine, Getchell Gold (drift-and-fill mine)
  • Geotechnical data collection (including structural mapping and core logging)


Project Leader, Mine Design Group, National Institute of Rock Mechanics,
Kolar Gold Fields, India

  • Geotechnical design of underground excavations, including sublevel stopes, blasthole stopes, room-and-pillar mines and cut-and-fill stopes for a large number of Indian mining companies
  • Introduction of new ground support systems and mining methods for improving safety and production from small underground mines

P.E. #33554, Geological Engineering, Arizona

P.E. #59825, Mining Engineering, Arizona  

Society of Mining Engineers, Registered Member 
American Rock Mechanics Association 
Mining, Metallurgical and Geological Institute of India

Mining Engineers Association of India