G.L. Tiley & Associates Ltd. was incorporated in 1972 to provide engineering services related to mine hoisting systems, rotating machinery, and controls for industrials drive systems. In keeping with this background, we have developed expertise in headframe, hoist room, and shaft guide system design, as well as custom hoist control systems, incorporating modern PLC-based controls and computer based HMI graphical operator interface systems. Our company has provided these services to the majority of mining and mining consultant companies throughout Canada, and to many companies in the USA, South America, Europe, Africa, and the Middle East.