Trust Shumba (BSc., BEng., MSc., PMP)

Process Manager @ Metso

About

I am a senior extractive metallurgist and process leader with over 20 years of experience delivering performance improvements across gold and base metal operations in Africa and the Middle East.I specialize in optimizing complex processing circuits including crushing, SAG/ball milling, flotation, BIOX, POX, CIL/CIP, and tailings systems. I have led operations treating up to 4 Mtpa, consistently improving throughput, recovery, and cost performance through data-driven decision-making and disciplined operational execution.My experience spans plant management, technical services, and project delivery — including commissioning, process optimization, and advanced process control (APC) implementation across multiple circuits.Key strengths include:• Turning around underperforming plants and stabilizing operations• Driving continuous improvement and operational discipline• Leading multicultural teams in high-performance environments• Aligning metallurgical performance with business and financial outcomesI have worked with global operators and engineering firms including Perseus Mining and Metso, delivering measurable gains in throughput, recovery, and cost efficiency.Selected impact highlights:• Throughput increase of over 10% through SAG milling optimization• 20% water recovery improvement via circuit optimization• Successful delivery of a 1.5 MW mill project (on time, on budget)• Implementation of Advanced Process Control (APC) across multiple circuits• Elimination of BIOX culture failures through structured test work and process control• Successful delivery of operations compliance monitoring system to improve execution and accountability• Mill to mine optimisation deliveryI am open to senior leadership roles including Process Manager, Metallurgy Superintendent, and General Manager – Processing, particularly within gold and complex refractory operations.📩 Open to opportunities across Africa, the Middle East, and global expat assignments.

Country

South Africa

City

Nelspruit

Industry

Mining & Metals

Skill

Operational Excellence, Carbon-in Leach (CIL) and Carbon-in-Pulp (CIP), Flotation, Bacterial Oxidation - BIOX, Pressure Oxidation (POX), Cost Reduction, Continuous Improvemen, Process Control (APC) , Plant Operations Management, Gold Processing, Leadership, Plant Maintenance, Process Optimization (Manufacturing), Statistical Process Control (SPC), Research and Development (R&D), Operations Management, Project Management, Minerals, Gold, Mineral Processing

Experience

Process Manager

Metso

2025-2 - Present · 1 yr 8 mos

Makkah, Saudi Arabia

• Managed a 500 tph processing plant (crushing, grinding, flotation, POX, CIL, neutralization) • Implemented metallurgical improvements to increase recovery and plant efficiency • Led Advanced Process Control (APC) deployment across grinding, flotation, and thickening circuits • Conducted metallurgical test work and plant surveys to support optimization strategies • Monitored KPIs and delivered actionable insights to improve plant performance • Mentored metallurgical and operations teams to improve capability and performance

Operations Compliance Superintendent

Kamoto Copper Company S.A.

2023-2 - 2024-12 · 1 yr 11 mos

Kolwezi

• Designed and implemented an operations compliance monitoring system to improve execution and accountability • Oversaw crushing and ore handling operations, ensuring alignment with production targets • Acted as Operations Manager during rotation cycles • Delivered structured training programs to develop national workforce capability • Improved operational discipline, safety reporting, and performance tracking

Technical Process Superintendent

DRA Global

2019-4 - 2023-1 · 3 yrs 10 mos

Makkah, Saudi Arabia

• Held full metallurgical accountability for a 2.4 Mtpa gold processing plant • Optimized SAG and ball milling circuits, improving throughput and reducing energy consumption • Led continuous improvement initiatives to enhance plant performance and reliability • Ensured compliance with International Cyanide Management Code (ICMC) standards • Conducted root cause analysis (RCA) and implemented corrective actions • Managed large multidisciplinary teams in a high-performance environment

Plant Manager

Pan African Resources PLC

2017-9 - 2019-4 · 1 yr 8 mos

Mpumalanga, South Africa

• Managed a 1.2 Mtpa tailings retreatment plant (hydro-mining, CIL, detox, deposition) • Led +200 personnel (staff and contractors) across operations and safety • Delivered improvements in recovery, cost control, and operational efficiency • Managed metallurgical accounting, budgeting, and reporting systems • Ensured compliance with environmental and cyanide management standards

Senior Plant Metallurgist - Barberton Mines Limited

Pan African Resources PLC

2014-1 - 2017-8 · 3 yrs 8 mos

• Led metallurgical operations across multiple processing plants including BIOX circuits • Eliminated BIOX culture failures through pilot plant development and toxicity control systems • Implemented data systems to improve metallurgical analysis and optimization • Optimized neutralization and environmental compliance processes

Principal Engineer

Mintek

2013-1 - 2013-12 · 1 yr

Technical role responsible for providing scientifically proven and economical solutions for clients in the physical separation division. Management of test work programs.

Senior Plant Metallurgist - Barberton Mines Limited

Pan African Resources PLC

2012-7 - 2012-12 · 6 mos

Mpumalanga, South Africa

Responsible for the technical aspects of the process. Project identification and CAPEX projects management. Mentoring of junior metallurgists. Role also involved operations of 3 refractory sulphide concentrator plants and a bacterial oxidation leach plant.

Metallurgist - Barberton Mines Limited

Pan African Resources PLC

2008-11 - 2012-6 · 3 yrs 8 mos

Plant Metallurgist in the BIOX(R) Plant. Responsible of the technical aspects of the process to achieve optimum unit process efficiencies. Project identification & execution.