Senior Metallurgist - Autoclave
Riyadh, SA Kraków, PL Kalgoorlie, WA, AU Canning Vale, WA, AU Kathu, ZA Santiago, Santiago Metropolitan Region, CL Smedjebacken, SE Coquimbo, CO, CL Sydney, NSW, AU Dungannon, GB Ballina, NSW, AU Mannheim, DE Ahmedabad, GJ, IN Swakopmund, NA KZ Bayswater, AU Rovaniemi, FI Changzhou, CN Caldwell, ID, US Mâcon, FR Oradea, RO Huarmey, PE Skopje, MK Prerov, CZ Henderson, WA, AU Oslo, NO Sudbury, ON, CA Mogalakwena, ZA Amadora, PT Alberton, ZA Västra Frölunda, SE Hyderabad, IN Chesterfield, GB Cudahy, WI, US Trelleborg, SE Adelaide, SA, AU Göteborg, SE Baish, SA Vitoria, BR Waterval, North West, ZA Barbil, IN Stokke, NO Eagle Farm, Brisbane, QLD, AU Kryvyi Rih, UA Olympic Dam, SA, AU Skellefteå, SE Mumbai, IN Ulaanbaatar, MN Toomebridge, GB Karratha, AU Glenorchy, TAS, AU Paget, QLD, AU Shanghai, SH, CN Tomago, NSW, AU Ontario, ON, CA Kuala Lumpur, MY Münster, DE Montreal, Quebec, CA Lima, PE RS Surabaya, ID Omagh, GB Waukesha, WI, US Wabush, NL, CA Kil, SE CN Irapuato, GUA, MX Oulu, FI Con Con, Valparaíso, CL Tashkent, UZ Kalajoki, FI Cananea, SON, MX Komsomolsk, UA Accra, GH Turku, FI Sofia, BG Ankara, TR Colombo, LK Tomago, NSW, AU Raipur, IN Calama, AN, CL Esperance, WA, AU Parauapebas, PA, BR Sorocaba, São Paulo, BR Salt Lake City, UT, US Orange, NSW, AU Madrid, ES Rugby, GB Luleå, SE Perth, AU PA N. Moudanion, 54, GR Rayagada, IN Townsville, QLD, AU Mesa, AZ, US CN Kewdale, WA, AU Kokkola, FI Tampere, FI Forrestfield, WA, AU Kelowna, British Columbia, CA TR BH Cinisello Balsamo, IT Gurugram, IN MA Rayagada, IN Pori, FI Arequipa, PE Vadodara, GJ, IN ZM Bollnäs, SE Chennai, IN Kolkata, IN High Wycombe, GB Olivet, FR Bangalore, IN Centurion, ZA Oberursel, DE Beijing, BJ, CN Gastonia, NC, US Antofagasta, AN, CL Gampaha, LK Bangkok, TH Kumasi, GH Alwar, RJ, IN Guayaquil, EC TW Šiauliai, LT Buenos Aires, AR Vienna, AT KZ Jharkhand, IN Frankfurt, DE Gällivare, SE Tarkwa, GH Lappeenranta, FI Jakarta, ID Sassenage, FR Nova Lima, MG, BR Vigra, NO Quzhou, ZJ, CN Germiston, ZA Newman, NSW, AU Callao, PE Tianjin, TJ, CN Kuopio, FI Brookfield, WI, US Melbourne, VIC, AU Cromer, NSW, AU York, PA, US Renukoot, IN Düsseldorf, DE Vilnius, LT Pune, IN VN Katowice, PL Manchester, PA, US Hibbing, MN, US Burlington, ON, CA Zacatecas, MX Bucharest, RO Etna, OH, US Espoo, FI Columbia, SC, US Beresfield, NSW, AU Suzhou, JS, CN Rouiba, DZ Dubai, AE Malmö, SE Shaoguan, GD, CN Cebu, PH Örnsköldsvik, SE Brno, CZ West Perth, WA, AU Foshan, GD, CN Vereeniging, ZA Utrecht, NL Kanagawa, JP Prince George, British Columbia, CA Birmingham, GB Faridabad, IN Kiruna, SE Sala, SE CH Freeport, ID Pittsburgh, PA, US Shenyang, LN, CN CN Centennial, CO, US
Join an industry leader and make a positive change in the sustainable use of the world’s natural resources. Together, we will transform the business and drive the industry toward a greener future.
At Metso, you will be supported by our inclusive culture and a network of colleagues from around the world. With us, you will embark on a personal growth journey and are encouraged to realize your potential. This is your invitation to rise above the possible.
Job posting end date: 10/13/2025
Metso Saudia Arabia is looking for Senior metallurgist for Autoclave to gold processing plant. Site is in remote area, accomodation is provided at camp close to site. Working time is 12 hours/day 6 days a week. Site is operating with roster, transportation and flights to/from site is provided by Metso.
Purpose of the job is to be responsible for monitoring, optimizing, and improving metallurgical performance across the autoclave, acidulation, neutralization, and filter press circuits of the gold processing plant. The role involves conducting and coordinating metallurgical analysis, reviewing day-to-day operations, and making timely adjustments to ensure plant stability, recovery, and compliance with safety and environmental standards. The Metallurgist will work closely with laboratory staff to ensure that all required analyses are carried out accurately and used effectively in decision-making
As work will be in isolated location we expect the candidate to have previous experience of similar type of work. And to be able to work with team in customer site together with customer crews.
Following requirements to manage the role
- Monitor the daily performance of the autoclave, acidulation, neutralization, and filter press circuits, ensuring safe, efficient, and stable operation.
- Track and analyze key parameters, such as:
- Autoclave: sulfide sulfur oxidation, acid balance, temperature, pressure, oxygen utilization, and free acid levels.
- Acidulation/Neutralization: pH, redox potential, lime consumption, scaling potential, and gypsum formation.
- Filter Press: filtration cycle times, cake moisture, filtrate clarity, bunker levels, and sulfur content in filter cake.
- Review plant laboratory results and request additional analysis when required, including:
- Sulfide sulfur (S²⁻) and sulfate (SO₄²⁻) measurements.
- Dissolved oxygen, free acidity, and carbonate levels.
- Residual cyanide impact on downstream circuits.
- Sulfur content and elemental sulfur balance in filter products.
- Work closely with the Laboratory Metallurgist and lab technicians to ensure all critical tests are carried out accurately and on time.
- Recommend and implement process adjustments to optimize recovery, reduce reagent consumption, and prevent scaling, corrosion, or filtration bottlenecks. Examples include:
- Adjusting oxygen injection and slurry density in the autoclave.
- Optimizing lime addition rates in neutralization.
- Controlling temperature and acid dosing to maintain circuit balance.
- Modifying filter press operation parameters to improve throughput and cake quality.
- Conduct troubleshooting and root cause investigations of process upsets, equipment scaling, filtration issues, or unusual assay results.
- Prepare daily and monthly metallurgical reports, highlighting trends, issues, and improvement opportunities.
- Support metallurgical test work programs to evaluate new reagents, operating conditions, or equipment modifications.
- Ensure compliance with safety, environmental, and metallurgical accounting standards.
Basic requirements
- Bachelor’s degree in metallurgical engineering, Chemical Engineering, or related discipline.
- 8+ years’ experience in hydrometallurgy or gold processing, preferably in pressure oxidation (POX), autoclave operations, or associated circuits.
- Strong knowledge of acid-base chemistry, sulfide oxidation reactions, neutralization, and solid-liquid separation.
- Hands-on experience with plant and laboratory analysis methods (AAS, ICP-OES, titrations, redox/pH probes).
- Ability to interpret data and translate into actionable process improvements.
- Strong communication skills to collaborate with laboratory, operations, and maintenance teams
- English skills (written and spoken)
Technical competence
- Metal Accounting/ Materials Testing and Analysis/ Sample Preparation and Examination/ Chemical and Physical Analyses/ Equipment Operation and Maintenance/ Collaboration and Reporting
- Process Monitoring & Optimization
- Metallurgical Analysis & Interpretation
- Filter Press & Solid-Liquid Separation Knowledge
- Lab Coordination & Data Validation
- Problem-Solving & Troubleshooting
- Technical Reporting & Communication
- Safety & Environmental Compliance
Collaboration and stakeholders
- Cooperation with all stakeholders at the site
- Cooperation with all stakeholders at the market area
- Customer representatives
- Officials and associations
How to join - Working at Metso - About Metso - Diversity and Inclusion - Meet our people
Metso is an equal opportunity employer committed to fostering an inclusive and diverse workforce culture. All qualified applicants will receive consideration for employment without regard to race, religion, color, nationality, gender, gender identity, sexual orientation, age, status as a protected veteran or status as a qualified individual with a disability.
Metso is a frontrunner in sustainable technologies, end-to-end solutions and services for the aggregates, minerals processing and metals refining industries globally. We improve our customers’ energy and water efficiency, increase their productivity, and reduce environmental risks with our product and service expertise. We are the partner for positive change.
Metso is headquartered in Espoo, Finland. At the end of 2024 Metso had close to 17,000 employees in around 50 countries, and sales in 2024 were about EUR 4.9 billion. Metso is listed on the Nasdaq Helsinki.