ANSYS, Inc. develops and markets engineering simulation software and services for engineers, designers, researchers, and students in the United States, Japan, Germany, China, Hong Kong, South Korea, rest of Europe, the Middle East, Africa, and internationally. It offers structural analysis product suite that provides simulation tools for product design and optimization; the Ansys Mechanical product, an element analysis software; LS-DYNA solver for multiphysics simulation; and power analysis and optimization software suite. The company also offers electronics product suite that provides electromagnetic field simulation software for designing electronic and electromechanical products; Ansys High Frequency Structure Simulator product for radio frequency and microwave design; SCADE product suite, a solution for embedded software simulation, code production, and automated certification; fluids product suite that enables modeling of fluid flow and other related physical phenomena; Ansys Fluent computational fluid dynamics software package; Ansys RedHawk-SC for electronic design automation; Ansys Optics software; and mission-simulation, modeling, testing, and analysis software. In addition, it offers Ansys Granta MI system for materials information management; Ansys Granta Selector technology for materials selection and graphical analysis; CES EduPack product, a set of teaching resources; Granta Materials Data for Simulation; Ansys Lumerical product, a photonics simulation software solution; safety-certified embedded software solutions; Discovery product family for use in the simulation of product design; academic product suite for research and teaching settings. ANSYS, Inc. was founded in 1970 and is headquartered in Canonsburg, Pennsylvania.

Jacobs Solutions Inc. provides consulting, technical, engineering, scientific, and project delivery services for the government and private sectors in the United States, Europe, Canada, India, Asia, Australia, New Zealand, the Middle East, and Africa. It operates through Critical Mission Solutions, People & Places Solutions, Divergent Solutions, and PA Consulting segments. The company offers cyber, data analytics, systems and software application integration and consulting, enterprise level and mission IT, design, nuclear, and enterprise level operations and maintenance services; software development, testing, mission integration, program management, research, development, test, evaluation services, training, and environmental remediation services; and other technical consulting solutions, as well as construction and construction management services. It also provides consulting services for consumer and manufacturing, defense and security, energy and utilities, financial services, government, health and life sciences, and transport industries. The company was founded in 1947 and is headquartered in Dallas, Texas.

Bentley Systems, Incorporated, together with its subsidiaries, provides infrastructure engineering software solutions in the Americas, Europe, the Middle East, Africa, and the Asia-Pacific. The company offers open modeling engineering applications, such as MicroStation, OpenBridge, OpenBuildings, OpenCities, OpenComms, OpenFlows, OpenPlant, OpenRail, OpenRoads, OpenSite, OpenTower, OpenTunnel, OpenUtilities, and OpenWindowPower; and open simulation engineering applications, including ADINA, AutoPIPE, CUBE, DYNAMEQ, EMME, LEGION, Power Line Systems, RAM, SACS, SPIDA, and STAAD; and geoprofessional applications for modeling and simulation of near and deep subsurface conditions, including AGS, Central, GeoStudio, Imago, Leapfrog, MX Deposit, Oasis montaj, OpenGround, and PLAXIS. It also provides infrastructure cloud applications, such as ProjectWise, SYNCHRO, and AssetWise, as well as iTwin platform that enables users to create and curate cloud native 4D/5D digital representations of physical infrastructure assets consisting of iTwin Capture, iTwin Experience, and iTwin IoT platforms. The company serves civil, structural, geotechnical, subsurface, process engineers, architects, geospatial professionals, city and regional planners, contractors, fabricators, and operations and maintenance engineers. Bentley Systems, Incorporated was incorporated in 1984 and is headquartered in Exton, Pennsylvania.

Tetra Tech, Inc. provides consulting and engineering services in the United States and internationally. The company operates through two segments, Government Services Group (GSG) and Commercial/International Services Group (CIG). The GSG segment offers early data collection and monitoring, data analysis and information management, science and engineering applied research, engineering design, project management, and operations and maintenance services; and climate change and energy management consulting, as well as greenhouse gas inventory assessment, certification, reduction, and management services. This segment serves federal, state, and local governments; and development agencies in water resources analysis and water management, environmental monitoring, data analytics, government consulting, waste management, and a range of civil infrastructure master planning and engineering design markets. The CIG segment provides early data collection and monitoring, data analysis and information management, feasibility studies and assessments, science and engineering applied research, engineering design, project management, and operations and maintenance services; and environmental remediation and reconstruction services, and industrial water treatment services. This segment serves natural resources, energy, and utilities markets, as well as sustainable infrastructure master planning and engineering design for facilities, transportation, and local development projects. Tetra Tech, Inc. was founded in 1966 and is headquartered in Pasadena, California.

Argan, Inc., through its subsidiaries, provides engineering, procurement, construction, commissioning, maintenance, project development, and technical consulting services to the power generation market. The company operates through Power Services, Industrial Services, and Telecom Services segments. The Power Services segment offers engineering, procurement, and construction, as well as designing, building, and commissioning of large-scale energy projects to the owners of alternative energy facilities, such as biomass plants, wind farms, and solar fields; and design, construction, project management, start-up, and operation services for projects with approximately 18 gigawatts of power-generating capacity. This segment serves independent power project owners, public utilities, power plant equipment suppliers, and other commercial firms. The Industrial Services segment provides industrial construction and field services and vessel fabrication services for fertilizer, engineering and construction, forest products, and various other industrial companies in southeast region of the United States. The Telecom Services segment offers trenchless directional boring and excavation for underground communication and power networks, as well as aerial cabling services; and installs buried cable, high and low voltage electric lines, and private area outdoor lighting systems. It also provides structured cabling, terminations, and connectivity that offers the physical transport for high-speed data, voice, video, and security networks. This segment serves electricity cooperative, state and local government agencies, counties and municipalities, and technology-oriented government contracting firms, as well as federal government facilities in the mid-Atlantic region of the United States. Argan, Inc. was incorporated in 1961 and is headquartered in Rockville, Maryland.

RCM Technologies, Inc. provides business and technology solutions in the United States, Canada, Puerto Rico, and Europe. It operates through three segments: Engineering, Specialty Health Care, and Life Sciences and Information Technology. The Engineering segment offers a range of engineering services, including project management engineering and design, engineering analysis, engineer-procure-construct, configuration management, hardware/software validation and verification, quality assurance, technical writing and publications, manufacturing process planning and improvement, and 3D/BIM integrated design. The Specialty Health Care segment provides long-term and short-term staffing, executive search, international recruitment, and placement services in the fields of allied and therapy staffing, correctional healthcare staffing, health information management, nursing services, physician and advanced practice, school staffing and recruitment, and telepractice. The Life Sciences and Information Technology segment offers enterprise business solutions, application services, IT infrastructure solutions, life sciences solutions, and other vertical market specific solutions; and data solutions, digitization, recruiting process outsourcing, human capital management solutions, workforce management, and consulting services. The company serves aerospace and defense, energy, financial services, health care, life sciences, manufacturing and distribution, and technology industries, as well as educational institutions and the public sector. RCM Technologies, Inc. was founded in 1971 and is based in Pennsauken, New Jersey.

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.

GEE Group Inc. provides permanent and temporary professional and industrial staffing and placement services in the United States. The company operates through two segments, Industrial Staffing Services and Professional Staffing Services. It offers placement of information technology, accounting, finance, office, engineering, engineering professionals for direct hire and contract staffing services, and data entry assistants; and temporary staffing services for industrial clients. The company also provides scribes that specialize in electronic medical record services for emergency departments, specialty physician practices, and clinics. It offers professional staffing services under the names of Access, Data Consulting, Agile Resources, Ashley Ellis, GEE Group (Columbus), Omni One, Paladin Consulting, Scribe Solutions, Accounting Now, Staffing Now, SNI Banking, SNI Certes, SNI Energy, SNI Financial, and SNI Technology; and light industrial contract labor under the Triad Staffing brand. The company was formerly known as General Employment Enterprises, Inc. and changed its name to GEE Group Inc. in July 2016. GEE Group Inc. was founded in 1893 and is headquartered in Jacksonville, Florida.