Walter W. Williams

Insituform Technologies LLC provides cured-in place pipe, other technologies, and services for the rehabilitation of water and wastewater pipeline systems. It offers solutions to remediate operational, health, regulatory, and environmental problems resulting from aging and defective pipelines. The company was founded in 1971 and is headquartered in Chesterfield, MO.

Natural Systems Utilities LLC engages in provision of water and energy utility services. It specializes in designing sustainable water ecologies for complete water supply, treatment, and reuse. The company was founded by Dominic Kulik in 2007 and is headquartered in Hillsborough, NJ.

BDO USA LLP operates as an accounting, auditing, and bookkeeping firm. It offers advisory; audit and assurance; digital; and tax services. The company was founded by Maximillian L. Seidman in 1910 and is headquartered in New York, NY.

Thompson Coburn LLP provides legal services. It offers services in the areas of antitrust, aviation, banking, business litigation, commercial acquisition and sale, corporate law, cyber security, estate planning, and intellectual property. The company was founded in 1929 and is headquartered in St. Louis, MO.

Part of Siemens AG, Arrowhead Industrial Water, Inc. is a company that specializes in on-site industrial water treatment systems. The company is based in Milpitas, CA. Arrowhead Industrial Water was acquired by United States Filter Corp. from Goodrich Corp. on May 04, 1995 for $80 million.

Part of Aegion Corp., Aegion Corrosion Protection Holdings Ltd. produces corrosion protection systems. The company is based in Stockton-on-Tees, UK. The British company was founded in 1988. Aegion Corrosion Protection Holdings was acquired by Corrpro Cos., Inc., part of Aegion Corp. from March 31, 2009 on March 17, 1994 for $14.92 million.

Part of Corrpro UK (Holdings) Ltd., Corrpro Companies Europe Ltd. is a company that provides vital infrastructure maintenance services. Corrpro Companies Europe Ltd. is based in Cleveland, UK. Corrpro Companies Europe was acquired by Corrpro UK (Holdings) Ltd. from Aegion Corp. on February 13, 2024. The British company was founded in 1968.

Insituform Technologies Ltd. provides pipeline construction services. It provides development and installation of proprietary technologies and services for rehabilitating sewer, water and other underground piping systems. The company was founded in 1971 and is headquartered in Wellingborough, the United Kingdom.

Founded in 2013, Aegion Rehabilitation Services Ltd. is a subsidiary of Aegion Corp. that provides sewer, water, energy, and mining piping systems, as well as corrosion protection for industrial pipelines. The company is based in Wellingborough, UK.

Founded in 1984, Corrpro Companies Engineering Ltd. is a subsidiary of Aegion Corp. that provides engineering services. The company is based in Wellingborough, UK.

Part of Aegion Corp., Environmental Techniques Ltd. is a British company that provides drainage inspection, cleaning and rehabilitation services. The company is based in Lisburn, UK. The company was founded in 1992. Environmental Techniques was acquired by Aegion Corp. from Killeen Trading Ltd. on March 17, 2017 for $8.04 million.

Part of Aegion Corp., Insituform Holdings (UK) Ltd. is a holding British company that operates subsidiaries manufacturing felt lining bags and repairing underground pipes. The company is based in Wellingborough, UK.

Insituform Linings manufactures and distributes insituform cured-in-place pipe process liners and tubes. The company was founded on June 2, 1983 and is headquartered in Wellingborough, the United Kingdom.