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Ecology & Environment, Inc., an environmental consulting firm, provides professional services to government and private clients worldwide. It offers support services for response and site assessment activities related to the release and threat of release of oil, petroleum products, hazardous substances, and weapons of mass destruction or pollutants or contaminants; and undertakes task order contracts comprising various environmental assessment projects, engineering and oversight of pollution remediation, and other hazardous waste remediation activities, as well as prepares environmental impact assessment documents for federal land management agencies. The company also provides services to various phases of energy development by conducting critical feature/fatal flaw analyses, social and health impact assessments, feasibility and siting studies, field surveys, permitting, construction inspection, and compliance monitoring. In addition, it conceives and designs environmental restoration projects that restore affected habitat through the integration of biological and engineering solutions; offers sustainability, resiliency, and climate adaptation services, as well as environmental planning and assessment, and military master planning and land use compatibility study services; and provides water supply, water quality, and watershed management services. Further, the company offers logistical support, emergency response/management, and planning services in various preparedness, mitigation, response, and recovery phases, as well as conducts hazardous waste site evaluations providing site investigation, engineering design, and operation and maintenance. Additionally, it is involved in the management and financial planning; institutional strengthening and standards development; water supply and development; wastewater treatment; and solid waste project construction supervision assignments. The company was founded in 1970 and is headquartered in Lancaster, New York.

Houston Wire & Cable Company distributes industrial fasteners in the United States. Houston Wire & Cable Company was founded in 1975 and is headquartered in Houston, Texas.

The LGL Group, Inc., together with its subsidiaries, engages in the design, manufacture, and marketing of frequency and spectrum control products in the United States and internationally. The company offers NTP Servers, broadband amplifiers, RF distribution, 1PPS distribution, and fiber optic distribution. It also offers time and frequency instrumentation, including frequency standards, time standards, and time code generators. In, addition it offers wide range of ancillary products, such as RF distribution amplifiers, digital distribution amplifiers, time code distribution amplifiers, and redundancy switches. Its products are used in computer networking, satellite ground stations, electric utilities, metrology, broadcasting, and telecommunication systems. The company was formerly known as Lynch Corporation and changed its name to The LGL Group, Inc. The LGL Group, Inc. was founded in 1917 and is based in Orlando, Florida.

Perma-Pipe International Holdings, Inc., together with its subsidiaries, engineers, designs, manufactures, and sells specialty piping and leak detection systems. It offers insulated and jacketed district heating and cooling piping systems for energy distribution from central energy plants to various locations; and primary and secondary containment piping systems for transporting chemicals, hazardous fluids, and petroleum products, as well as engages in the coating and insulation of oil and gas gathering and transmission pipelines. The company also offers liquid and powder based anti-corrosion coatings for external and internal surfaces of steel pipe, including shapes like bends, reducers, tees, and other spools/fittings that is used in pipelines for the transportation of oil and gas products and potable water. It has operations in the United States, Canada, the Middle East, Europe, India, and internationally. The company was formerly known as MFRI, Inc. and changed its name to Perma-Pipe International Holdings, Inc. in March 2017. Perma-Pipe International Holdings, Inc. was incorporated in 1993 and is headquartered in Spring, Texas.