42 Engineering and architectural design, namely, creating plans, specification and preliminary and final designs for others for large and complex engineering projects to build, maintain and improve healthcare complexes, k-12 schools, colleges and universities, public buildings, power plants, energy facilities, commercial, industrial and manufacturing facilities, and federal, state and municipal infrastructure, namely, bridges, highways, mass transit systems, port and harbor facilities, airports, water supply, and water and waste treatment and distribution systems; Systems engineering for large and complex engineering projects to build, maintain and improve public buildings, power plants, industrial and manufacturing facilities, and federal, state and municipal infrastructure, namely, bridges, mass transit systems, port and harbor facilities, airports, water supply, and water and waste treatment and distribution systems; Technical assistance in the establishment and operation of large and complex engineering projects to build, maintain and improve healthcare complexes, public buildings, commercial, industrial and manufacturing facilities, power plants, and federal, state and municipal infrastructure, namely, highways, mass transit systems, port and harbor facilities, airports, water supply, and water and waste treatment and distribution systems; Technical planning and design services for others in the field of engineering for general building, transportation facilities and infrastructure, manufacturing, sewer waste, power, industrial processes, petroleum, telecommunications, hazardous waste for the energy, defense and security, education, retail, government, manufacturing, industrial, commercial, transportation, transportation security, pollution abatement, air, water, and soil resources and health care industries; Design services for others in the field of defense systems, namely, engineering for development of aviation and ground systems, vehicles, shelters and ground support equipment; Reviewing standards and practices to assure compliance with environmental zoning laws and regulations; reviewing standards and practices to assure compliance with environmental and radiological laws and regulations; Land-use planning services; Design services for others in the field of engineering for air emission control, and flood control; Civil and environmental engineering services, namely, preparing environmental impact assessment, preparing environmental impact assessment in the fields of climate change and bio-diversity, biological, ecological, energy management, and earthquake studies, and compliance reports; Engineering services for water treatment and purification plants and solid waste treatment plants; Computer consultation in the field of computer security; computer security service, namely, restricting access to and by computer networks to and of undesired web sites, media and individuals and facilities; design and development of computer networks; Engineering services with respect to government, commercial and industrial properties; Design of government, commercial and industrial properties for others; Computer and computer network design and engineering, in the fields of geographic information services combining software and information technology to produce visual representations of topographies; Computer application software development for others for simulation and imaging services, Integration of computer systems and networks; Development, updating, and maintenance of databases; Engineering in the field of network and database design and development; Engineering services for large and complex engineering projects to build, maintain and improve healthcare complexes, k-12 schools, colleges and universities, public buildings, power plants, commercial, industrial and manufacturing facilities, and federal, state and municipal infrastructure, namely, bridges, highways, mass transit systems, airports, port and harbor facilities, water supply, and water and waste treatment and distribution systems; Operations for computer systems and computer networks in the nature of computer and network design and engineering, computer application development, computer application integration, development, updating, and maintenance of databases, computer network integration, and computer systems integration for large and complex engineering projects