Michael R Helms

National Portrait Gallery operates as an art museum. It helps adults, families, students, teachers, and teens to learn about different portraits inside the museum. The company was founded in 1962 and is headquartered in Washington, DC.

Tetra Tech EC, Inc. provides consulting, engineering, remediation, and construction services. The company is headquartered in Pasadena, CA.

Black & Veatch Ltd. provides consulting, refurbishment and decommissioning services for water-related projects in Europe. The firm covers all aspects of design and management of dams, pipelines, canals, water and wastewater and industrial water treatment plants, as well as the refurbishment of water and wastewater industry structures and facilities. It also provides mechanical and electrical engineering design services, building design and project management services, and IT services. The company was founded by Ernest Bateman Black and Nathan Thomas Veatch on February 23, 1996 and is headquartered in Redhill, the United Kingdom.

CRB Consulting Engineers, Inc. provides consulting management services. Its services include engineering, architectural, construction and consulting services. The company was founded by Jeff Biskup in 1984 and is headquartered in Kansas City, MO.

Smithsonian National Museum of American History is a museum. It collects, preserves, and displays the heritage of the United States in the areas of social, political, cultural, scientific, and military history. The company is headquartered in Washington, DC.

American Battlefield Trust operates as a heritage land protection organization. It also engages in the preservation of the history of American Civil War battlefields. It provides the Hallowed Ground quarterly membership magazine, classroom resources, special events, battlefield interpretation, and landscape restoration and upkeep. The company was founded in 1999 and is headquartered in Washington, DC.

Smithsonian Institution operates museums and art galleries. It organizes exhibitions on art, music, television and film, science, and history. The firm also preserves and maintains cultural centers, national zoo, and research facilities. The company was founded on August 10, 1846 by James K. Polk and is headquartered in Washington, DC.

Stanley Consultants, Inc. provides engineering, environmental and construction consulting services. The firm?s services include consulting and planning, engineering and design, urban design and landscape architecture, construction administration and design-build. Its services are used in the areas of power generation, potable water, roads and bridge, and multimodal systems. The company was founded in 1913 and is headquartered in Muscatine, IA.