Lhoist North America (LNA) is now part of Martin Marietta, combining two North American industry leaders with shared commitments to safety, operational excellence, and customer success. During the transition, LNA positions will not be posted on the Martin Marietta careers page. If you are interested in career opportunities located withing the former LNA operational footprint, please use the links below and submit your application.
Latest open positions
Mining & Stone Processing
Material Handler
At Lhoist North America, our core values of 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:The Material Handler assists with running the Lowell granular plant, drying and milling systems. This role has shared responsibility to produce quality limestone products with the safe and efficient operation of the granular plant, dryer and mills.RESPONSIBILIT USA - Florida - Ocala
Calcination & Lime Processing
Process Assistant
At Lhoist North America, our core values of 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:The Process Assistant is responsible for day-to-day maintenance throughout the plant, housekeeping in the plant, assist with loading of trucks and railcars, and the removal of lime/limestone waste from the plant to designated dump areas. RESPONSIBILITIES & E USA - Texas - Burnet
Operational Maintenance
Maintenance Mechanic
At Lhoist North America, our core values of 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.Job Description SummaryThis position is responsible for the safe and efficient preventative maintenance and repair activities of the fluid bed dryer, granulation / milling systems and shipping systems in the plant / crusher.RESPONSIBILITIES & EXPECTATIONS: Maintain high sta USA - Florida - Ocala