The following presents a condensed list of the core staff members in the Structural and Project Department along with a brief description of their responsibilities.




Pierre Shields, P.Eng., A.Sc.T.

Vice President, General Manager & Project Administrator

B.Sc. (Civil Engineering - University of the West Indies, Trinidad, 1993)

G.L.Tiley & Associates Ltd. staff since 2003


  • • Underground & Structural headframe designs
  • • Shaft & hoist building, machinery foundations
  • • Loading pocket & material handling systems
  • • Engineering, shop detail drawing & reviews
  • • Quantity take-offs, BOM preparations
  • • Sinking Galloway, work deck conveyance design
  • • Specifications and capital cost estimates

Richard Zandstra, P.Eng.

vice President, Structural Engineering Supervisor

B.Eng. (McMaster University, 1994)

G.L.Tiley & Associates Ltd. staff since 1996


  • • Headframe and hoist building layout and design
  • • Hydraulic dump systems
  • • Shaft steel design and analysis
  • • Loading pockets
  • • Material handling systems
  • • Specifications and capital cost estimates




Amanpreet Ahuja, P.Eng., P.E.

Structural Engineer

B.Eng. (Natl. Institute of Technology, India, 2003)
M.Sc. (University of Nevada, 2007)

G.L.Tiley & Associates Ltd. staff since 2018


  • • Headframe design analyis and inspection
  • • Shaft and hoist building, machinery foundations
  • • Shaft guide and conveyance design
  • • Finite element modelling and analysis


Simon (Weixiao) Sun, P.Eng.

Structural & Project Engineer

B.A.Sc. (University of Ottawa, 2008)
M.Sc. (McMaster University, 2011)

G.L.Tiley & Associates Ltd. staff since 2011


  • • Project engineering design coordination
  • • Headframe and hoist building layout and design
  • • Loading pockets and material handling system
  • • Design, specification, analysis, and inspection
  • • Finite element modeling and analysis

Suresh Yelamanchili, P.Eng.

Structural Engineer

B.Tech. (Sri Venkateswara University, India, 1992)
M.Tech. (Natl. Institute of Technology, India, 1996)
M.Eng. (University of Waterloo, 2009)

G.L.Tiley & Associates Ltd. staff since 2010


  • • Headframe design analysis and inspection
  • • Shaft & hoist building, machinery foundations
  • • Shaft guide design
  • • Finite element modelling and analyis

Kenneth Lau, P.Eng.

Consultant Director

B.Sc. (Civil - Illinois, 1972)
M.Sc. (Structural - Illinois, 1975)

G.L.Tiley & Associates Ltd. staff since 1987


  • • Headframe design, analysis, & inspection
  • • Shaft & hoist building, machinery foundations
  • • Shaft guide and conveyance design, dynamics
  • • Finite element modeling and analysis



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