Founded in 1975 as Geological Consulting Services, Marshall Miller & Associates is a full-service company that offers a range engineering technology services. It provides geological, environmental, hydrogeological and mining engineering services. The company specializes in various areas, including carbon credits and management, geographic information systems, geophysical logging systems, mine and quarry permitting and sustainable development services. Geological Consulting Services is comprised of more than 200 employees and operates more than 10 branches throughout the United States. It also offers various services to the power generation industry, such as fuel supply assessment, environmental licensing and permitting, safety and health and strategic planning and economic analysis. The company additionally conducts environmental site assessments, fugitive dust management, telecommunications permitting and voluntary remediation and redevelopment services. With a location in Ashland, Va., Geological Consulting Services maintains its headquarters in Bluefield, Va.