Mark Duff

Safety & Ecology Corp. provides environmental engineering and contract services. It offers construction, remediation and demolition, environmental services and environmental technology. The company was founded by Christopher P. Leichtweis in 1991 and is headquartered in Knoxville, TN.

Leidos, Inc. provides scientific, engineering, systems integration and technical services and solutions. It offers solutions and services that leverage the power of data analytics, systems integration, and cyber security across national security, health, and engineering markets. The company was founded by John Robert Beyster in June 1969 and is headquartered in Reston, VA.

Timios National Corp. engages in the acquisition, development and consolidation of real estate services related businesses. It focuses on creating long-term value by taking controlling interest and developing its subsidiary companies through operations and management. The company was founded on August 12, 1997 and is headquartered in Arlington, VA.

Safety & Ecology Holdings Corp. provides environmental, infrastructure and nuclear energy services. It offers construction, remediation, and demolition services, such as facility deactivation, decontamination, site closure, threat reduction, security, and federal facility specialty construction and environmental services. The company is headquartered in Oak Ridge, TN.