Bruce Gregory
Director / Technical Lead Mine Sustainability and Development | Open Pit Mining - Australia

Bruce is a mining engineer with over 40 years’ experience in technical and leadership roles spanning mine planning, production, and engineering management. Early in his career, he focused on mine planning and equipment evaluation, including pioneering in-pit crushing and conveying systems. He progressed to senior roles overseeing open-pit operations - pit design, long-term scheduling, geology, and geotechnical analysis - before moving into mine production leadership. After transitioning into consulting in late 1996, Bruce specialised in open-pit feasibility studies, equipment selection, cost estimation, and valuation. His expertise has supported major decisions, including contractor versus owner-mining evaluations for large-scale operations. With extensive international experience, he has reviewed more than 50 open-pit sites since 2010. He has also held executive roles in technical leadership and business improvement, contributing to operational excellence and strategic decision-making across the mining sector.

Calli Knievel

Technical Lead Underground Mining

Cailli is a highly skilled mining engineer with over 30 years of experience, consisting of 20 years supporting mining operations in site-based roles in Australia, Africa, Europe, South America and the USA, as well as a further ten years in various corporate roles and consulting on international mining projects. With a passion for bringing diverse teams together to solve complex problems, she is well versed in managing multiple viewpoints and making connections. She has developed the ability to rapidly identify key issues, frame appropriate solutions, engage the resources necessary to execute and see through to successful implementation. Customer focused, Cailli cares deeply about delivering what is needed and is simultaneously passionate about developing others and contributing to an inclusive industry that people want to be a part of.

Mark Hemp

Principal Geotechnical Engineer

Mark has over 35 years of diverse geotechnical engineering experience, working on major projects for top clients like Rio Tinto and Anglo American, as well as smaller mining entities. His work has spanned Africa, Asia, Europe, South America and Australia. His expertise includes open pit stability studies, underground block cave/SLC studies, geotechnical exploration programs, hydrogeological investigations, mine plant and tailings dam investigations, tailings dam construction supervision, and projects involving commercial and residential structures and pavements. Mark has extensive experience with commodities such as iron ore, gold, diamonds, potash, polyhalite, tungsten, and manganese. He has successfully developed and mentored geotechnical teams in both operational and consulting settings. In his operational roles, he has worked at locations including Argyle Diamond Mine and Boddington Gold Mine. In consulting, he has managed numerous studies from Order of Magnitude through to Feasibility and Detailed Design.