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Acorn Energy, Inc., together with its subsidiaries, develops and markets wireless remote monitoring and control systems for various markets in the United States and internationally. It operates in two segments, Power Generation (PG) Monitoring and Cathodic Protection (CP) Monitoring. The PG segment provides wireless remote monitoring and control systems, and services for critical assets, which include stand-by power generators, pumps, pumpjacks, light towers, turbines, compressors, fire pumps, and other industrial equipment; and Internet of Things applications. The CP segment offers remote monitoring and control products for cathodic protection systems utilized in gas pipelines for gas utilities market and pipeline operators. The company was incorporated in 1986 and is based in Wilmington, Delaware.

ENGlobal Corporation provides engineering and professional project execution services primarily to the energy sector in the United States and internationally. It operates in two segments, Commercial and Government Services. The Commercial segment provides multi-disciplined engineering services and fabrication relating to the development, management, and execution of projects requiring professional engineering and related project management services. It offers conceptual studies, project definition, cost estimating, engineering design, environmental compliance, material procurement, project management, construction management, and fabrication services. The Government Services segment provides design, integration and implementation of process distributed control and analyzer systems, advanced automated data gathering systems, information technology, and the maintenance of these systems; and electrical and instrument installation, technical services, ongoing maintenance, calibration, and repair services. It also provides services related to the engineering, design, installation, and maintenance of automated fuel handling and tank gauging systems for the United States military. The company serves Fortune 500 companies in the energy industry and the United States government. The company was formerly known as Industrial Data Systems Corporation and changed its name to ENGlobal Corporation in June 2002. ENGlobal Corporation was founded in 1985 and is headquartered in Houston, Texas.

Hill International, Inc. provides project and construction management, and other consulting services primarily for buildings, transportation, environmental, energy, and industrial markets. The company offers program management, project management, construction management, project management oversight, troubled project turnaround, staff augmentation, project labor agreement consulting, commissioning, estimating and cost management, and labor compliance and facilities management services. It primarily serves the United States federal, state, and local governments; other national governments; and the private sector. The company operates in the Americas, Europe, the Middle East, Africa, and the Asia Pacific. Hill International, Inc. was founded in 1976 and is headquartered in Philadelphia, Pennsylvania.

Mistras Group, Inc. provides technology-enabled asset protection solutions in the United States, other Americas, Europe, and the Asia-Pacific. The company offers non-destructive testing services; inline inspection for pipelines; and plant condition management software. It also provides maintenance and light mechanical services, such as corrosion removal, mitigation and prevention, insulation installation and removal, electrical, heat tracing, industrial cleaning, pipefitting, and welding; engineering consulting services primarily for process equipment, technologies, and facilities; and utilizes scaffolding and rope access to access at-height and confined assets. In addition, the company offers certified divers for subsea inspection and maintenance; unmanned aerial, land-based, and subsea systems for inspection applications; online condition-monitoring solutions; quality assurance and quality control solutions for new and existing metal and alloy components, materials, and composites. Further, it builds monitoring systems, as well as provides inspection, maintenance, monitoring and data services; and Web-based solutions. Additionally, the company designs, manufactures, and sells acoustic emission sensors, instruments, and turnkey systems for monitoring and testing materials, pressure components, processes, and structures; and ultrasonic testing equipment. It serves oil and gas, aerospace and defense, fossil and nuclear power, power generation and transmission, civil infrastructure, manufacturing, industrial, public infrastructure, petrochemical, transportation, and other process industries, as well as infrastructure, research, and engineering industries. Mistras Group, Inc. was founded in 1978 and is headquartered in Princeton Junction, New Jersey.

Umbra Applied Technologies Group, Inc. operates as a green technology development, fabrication, and commercialization company. The company develops and manufactures equipment, products, and systems to global remediation projects. Its technologies include power generation, oil and sand processing, oil shale processing, inland and salt water oil spill remediation, water remediation, water desalinization and medical waste remediation, and e-waste remediation. The company was formerly known as Green Processing Technologies, Inc. and changed its name to Umbra Applied Technologies Group, Inc. in January 2014. The company was incorporated in 2011 and is headquartered in Spring Hill, Florida. Umbra Applied Technologies Group, Inc. is a subsidiary of Green Processing Technologies, Inc.