Douglas G. Smith

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

SC Cos., Inc. provides engineering, environmental, and construction services. Its services include window and gutter cleaning, acoustical remediation, handyman/ punch-outs, duct cleaning, pressure washing, window and gutter cleaning. The company was founded in 1986 and is headquartered in Muscatine, IA.

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.

MWH Global, Inc. provides consulting, engineering and construction services to water and natural resource sector. The firm's services include climate change management; research and analytics, engineering and design, and digital enterprise services. The company was founded in 1820 and is headquartered in Broomfield, CO.