A member of the S&P 500 Index, Martin Marietta employs more than 8,500 employees at operations spanning 28 states, Canada and the Bahamas. A leading supplier of aggregates and heavy building materials, dedicated teams at Martin Marietta supply the resources for the roads, sidewalks and foundations on which we live. At Martin Marietta, we are always looking for the best and the brightest, for people who have the potential to be the Company's future leaders. We are building on our foundation of success by selecting the finest people and helping them realize their potential. When you decide to build your career at Martin Marietta, you'll know what it's like to be respected, challenged and rewarded.

Alpha Metallurgical Resources (NYSE: AMR) is a Tennessee-based mining company with operations across Virginia and West Virginia. With customers across the globe, high-quality reserves and significant port capacity, Alpha reliably supplies metallurgical products to the steel industry. Alpha Metallurgical Resources is committed to operating safely, efficiently, and responsibly, with customer service second-to-none and an ongoing focus on continuous improvement.

Alpha Metallurgical Resources (NYSE: AMR) is a Tennessee-based mining company with operations across Virginia and West Virginia. With customers across the globe, high-quality reserves and significant port capacity, Alpha reliably supplies metallurgical products to the steel industry. Alpha Metallurgical Resources is committed to operating safely, efficiently, and responsibly, with customer service second-to-none and an ongoing focus on continuous improvement.

We are a world leader in mineral-based specialties, offering high value-added solutions to many different industries, ranging from process manufacturing to consumer goods. Our value-added solutions are formulated to meet the technical specifications of each customer and contribute to the performance of a multitude of products in three categories: 1. Functional additives - added to the mineral formulation of customers’ products. 2. Mineral components - essential constituents in the formulation of customers’ products. 3. Process enablers - used in customers’ manufacturing processes, but not present in the end product. These serve many industries such as construction materials, mobile energy, steelmaking, agri-food, automotive, and cosmetics. For more information about us and what we do, please visit our website.

United Coal Company is a wholly-owned subsidiary of Metinvest Holding Company and is focused on mining the highest quality metallurgical coal reserves in the world, while providing a safe and stable environment for our employees.

Sibelco is a global material solutions company. Our company sources, transforms and distributes specialty industrial minerals – particularly silica, clays, feldspathics and olivine – and is a leader in glass recycling. Sibelco delivers solutions for society and supports the progress of modern life, from drinking water sanitation to solar technology and from flame retardants to smartphone screens. We serve industries as diverse as glass, ceramics, construction, coatings, polymers and water purification. Founded back in 1872, we have grown into a multinational business with operations in around 30 countries and an extensive multi-mineral portfolio. We work with customers worldwide across a broad range of industries, delivering solutions that combine high-specification materials with dedicated technical support. Sibelco seeks to be a great place to work. We strive for continuous improvement in the health and safety of our colleagues and we promote diversity and inclusiveness in all our activities. Sustainability is fundamental part of our vision. As well as developing products that help our customers thrive, we also look at how we can minimise environmental impact and maximise environmental opportunities. We generate economic value through innovation and our ability to meet and anticipate our customers’ expectations. Our goal is to deliver long-term social, environmental and economic value for our stakeholders, continuously guided by our purpose: Material solutions advancing life.

Romarco Minerals Inc. is a gold development company focused on production in the US and Mexico. The Company's flagship project is the Haile Gold Mine in South Carolina which is currently undergoing exploration drilling, bankable feasibility study and permitting. The Pinos Gold District in Mexico is a high grade epithermal vein district in the advanced exploration stage.

In 2011, Imerys Minerals and Norsk Minerals merged their key production plants—Spruce Pines, North Carolina, and Drag, Norway—to form The Quartz Corp (TQC). This 50/50 joint venture, capitalising on the expertise of both companies, and Imerys’ access to the world's purest quartz deposit, has enabled The Quartz Corp to supply top quality High Purity Quartz to customers within a variety of industries. With offices in North America and Europe, as well as employees on the ground in China, we are able to support a network of global customers, many of whom are key players within their respective industries. Our vision is to become a major and sustainable player in the High Purity Quartz market by supplying High Purity Quartz materials to all relevant market segments. Our High Purity Quartz is unique, sourced from Spruce Pines, the only mine on earth with quartz pure enough to produce the crucibles needed to manufacture semiconductor ingots. Taking this unique product from Spruce Pines, combining this with our other pure quartz source in Drag, Norway, treating it in our plant in Drag, allows us to produce both standardised and specialised products for our customers, based on their needs. Working closely with customers and strategic partners, we strive to be the highest quality and most reliable producer of High Purity Quartz materials, providing solutions to our customers'​ evolving needs.

Polycor Inc. is the world's leading natural stone quarrier and its core mission is to make people fall in love with natural stone. Their world-class reputation comes from a great legacy of stone work on historical landmarks, institutional, commercial and residential projects. Founded in Québec City (Canada) in 1987, the company now employs nearly 1,300 people and owns over 50 quarries and 20 manufacturing plants across North America and Europe.

Hedrick Industries is proud to be a fourth-generation, family-owned and operated business. We take great pride in providing quality construction materials that help to build the airports, roads, hospitals, schools, churches, playgrounds, and homes that make up our communities. Beginning with a single gravel deposit in Lilesville, North Carolina in 1924, Hedrick Industries worked its way towards becoming one of the most respected and innovative aggregate producers in the industry – building the trust and respect of our customers, road builders, and contractors one load of gravel at a time. Through the hard work and dedication of our employees and management, Hedrick was able to expand along with the state of North Carolina’s developing road system. During the early 1950s, B.V. Hedrick Gravel & Sand Company acquired Grove Stone and Sand Company. This expansion into the western North Carolina region continued with the opening of North Buncombe Quarry in 1979. In 1986, Lake Norman Quarry opened to help service the rapidly expanding Charlotte market. Through quality construction aggregate and excellent service, Hedrick Industries has developed an excellent reputation throughout the industry and allowed for further expansion across North and South Carolina – including Piedmont Sand (1994), Green River (1998), South McDowell (2000), Aquadale (2004), and Norman Sand (2010). Today, Hedrick Industries is the fifth-largest producer of crushed stone in the state of North Carolina. We are confident that our customers realize that Hedrick is a loyal partner – providing great value, exceptional service, and quality materials. Whether the construction needs are for a road-way expansion project or the beautification of a garden or walkway at home, we have the materials to literally build, fortify, and beautify the communities throughout Western North Carolina and the Piedmont region.

Piedmont Lithium is developing a world-class integrated lithium business in the United States, enabling the transition to a net zero world and the creation of a clean energy economy in America. Our location in the renowned Carolina Tin Spodumene Belt of North Carolina, the cradle of the lithium industry, positions us to be one of the world’s lowest cost producers of lithium hydroxide, and the most strategically located to serve the fast-growing US electric vehicle supply chain. The unique geographic proximity of our resources, production operations and prospective customers, places us on the path to be the most sustainable producer of lithium hydroxide in the world and should allow Piedmont to play a pivotal role in supporting America’s move toward decarbonization and the electrification of transportation and energy storage. For more information, www.piedmontlithium.com.

Best Sand & Gravel, Inc. is a full-service grading company that serves the grading needs of commercial and industrial site developers and contractors within North Carolina. Our corporation has been in the business for 50 years. We are a Licensed General Contractor, specializing in Earthwork, Grading, Sand & Gravel, Storm Drain, Water & Sewer, Concrete Crushing, Demolition, & A Certified LCID. We are committed to providing quality aggregates & superior workmanship for sitework & grading needs.