Join our Talent community. Now accepting applications for future opportunities across various locations At Lhoist North America, our core values or Respect, Courage, and Integrity are more than words. We respect people, encourage courageous innovation, and uphold integrity in everything we do. If these principles resonate with you, you may find your next great opportunity with us. We believe our people make the difference. That’s why we invest in talent by offering meaningful opportunities to grow your skills, expand your knowledge, and pursue your interests. Our work environment prioritizes safety, fosters collaboration across teams, and embraces inclusion. Here, you’ll be challenged to grow, and you’ll be supported throughout your career journey. Join us and help shape the future of Lhoist North America. POSITION SUMMARY: Unique role for an individual who is looking to gain more mine engineering experience and who enjoys the southwest climate and being outdoors. Position will be responsible for developing short and medium term mine plans. Maintaining mine models and using these tools to lead short-term mine planning at the site. Position responsible for regular updates of pit and dump topography, completion of monthly drone volume surveys in all active mining areas and ore stockpiles. Conduct surveys and track quality control data to define ore zone contact limits and maintaining accurate planning and practices. Lead surveying site needs as well as developing and recording exploratory and quality control drilling layouts and organizing the associated ore quality data for isopach model entry. Responsibility over short-term mine planning while keeping operations on budget, achieving requisite ore inventory targets and working closely with corporate G&M counterparts for the development and implementation of a long-term quarry plan. RESPONSIBILITIES & EXPECTATIONS: Volume Surveys: Complete monthly volume surveys in all active pits and ore stockpiles for volume and ore reconciliation. Reconcile production volumes with end of month and annual aerial surveys. Monthly updates of mining models, pit topography to facilitate short-term planning accuracy as well as ensuring the models are consistent. Mine Surveys: Survey and track quality control data to define ore zone contact limits in pit to improve ore recovery in all pits. Survey and record extraction patterns. Maintain mine plan records for future reference and adjacent pattern layouts. Review grade information in active pits to improve mining accuracy. Layout pit designs and project work for mining accuracy and improvements to ore recovery. Planning: Create short and medium term mine plans. Communicate mine plans to the quarry operators. Coordinate Exploratory Drilling campaigns including logging, collection and organizing of samples for onsite analysis, and inventorying sample splits. Complete short term mining plans to keep operations on budget and drive the development of a long-term site quarry plan. Use drill core lab data to develop and maintain mine isopach models, improve ore yields and reduce wastage and put data into practice by optimizing the day-to-day actions of the quarry team. Support the development of weekly, monthly, quarterly, and annual mine and waste storage plans. Liase and coordinate with corporate G&M technical team as required. Conduct periodic audits / trainings of ore sampling protocols with quarry personnel as well as measurement procedures with the site lab team. Other duties as assigned. ATTRIBUTES: Experience with or high aptitude for learning CAD based computer software (e.g. AutoCAD, Carlson, Surpac, etc.). Familiarity with or high aptitude for learning GPS survey equipment. Experience with survey equipment, drones, etc., is a plus. Attention to detail with strong analytical and mathematical skills. Must be capable of working outside in severe (hot / cold) weather conditions. Able to work effectively in a cross-disciplinary way with all levels of the organization. Excellent communication, presentation, and technical writing skills. Ability to prioritize and manage multiple tasks/projects and meeting deadlines. Displays sound judgment when deciding among multiple alternatives. Strong sense of urgency in meeting site and customer needs. Proficient with AutoCAD, Excel (advanced), PowerPoint, and Word. Previous SAP knowledge is a plus. PHYSICAL DEMANDS INCLUDE, BUT ARE NOT LIMITED TO: Must be physically able to perform work assigned. Physically capable of walking on uneven surfaces and accessing all plant and quarry locations. Access all areas within a site which could include heights of 150 feet, confined spaces, climbing ladders or stairs, and accessing tunnels. Will be working at times in covered / climate-controlled environment but mainly in a lime/mineral environment. The employee will be exposed to the following working conditions: Extreme Heat and Cold, Noise, Vibration, Oils, and Atmospheric Conditions such as Dust, Fumes, and Lime/Mineral Particles. The employee will be required to perform the following actions (from time to time): Standing, walking, balancing, stooping, kneeling, reaching, talking, seeing, hearing and sitting. Ability to lift/carry 50 pounds. Able to work on different shifts as needed for drilling and other mine planning work. Ability to travel up to 20% to other sites as needed and/or directed by leadership. REQUIRED EDUCATION: Bachelor’s degree in Mine Engineering from an accredited institution, and/or equivalent relevant education and experience. PREFFERED EDUCATION: MS Degree in Mine Engineering, or related field. REQUIRED EXPERIENCE: Minimum of one to three (1-3) years’ experience in surface mining preferable in the lime or cement industry. PREFFERED EXPERIENCE: Previous surface mining operation with at least three (3) years’ previous experience. Lhoist North America is proud to offer a highly competitive compensation package designed to support your well-being and future. Our benefits include comprehensive medical, dental, vision, life, and disability insurance, along with paid vacation and sick time. We also offer an attractive 401(k) Retirement Savings Plan with a generous Employer Match as well as a Supplemental Contribution based on your Years of Service to help you plan confidently for the future. We recognize that growth doesn’t stop at the workplace. That’s why we provide educational assistance to encourage continued learning and professional development, empowering our employees to reach their full potential. At Lhoist North America, your success is our investment. Lhoist North America is proud to be an Equal Opportunity Employer. We are committed to fostering a workplace that values inclusion, respect, and diversity. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, disability, or protected veteran status. We believe that a diverse and inclusive environment strengthens our teams and drives innovation. That’s why we encourage individuals from all backgrounds to apply and strive to ensure every employee feels respected, supported, and empowered to succeed. At Lhoist North America, inclusion isn’t just a policy, it’s a core part of who we are. If you need assistance completing the application process, please contact lna.accommodations@lhoist.com. This contact information is for accommodation requests only and cannot be used to inquire about the status of applications. The Lhoist Group is a family-owned business and one of the world’s leading lime, dolime, and mineral solutions producers. Our people are at the heart of our operations. The company’s global success comes from our teams’ continuous efforts to innovate and seek out new opportunities, at every level of the business. Curious to learn more about us? Visit lhoist.com

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