biggest companies in Chantilly, VA

Allied Universal provides unparalleled service, systems, and solutions to serve, secure, and care for the people and businesses in their communities. Their relationships with their employees and clients are at the heart of everything they do, each and every day. This dependable company offers security services, security systems, janitorial and staffing services.

& Halske, was founded in 1847 and is headquartered in Munich, Germany. Siemens' principal activities are in the fields of industry, energy, transportation and healthcare. It is organized into five main divisions: Industry, Energy, Healthcare, Infrastructure & Cities, and Siemens Financial Services (SFS). Siemens and its subsidiaries employ approximately 360,000 people across nearly 190 countries and reported global revenue of approximately 73.5 billion euros for the year of 2011. In the industry sector, the company's portfolio ranges from industry automation and drives products and services to building, lighting, and mobility solutions and services, as well as includes system integration and solutions for plant business. It offers automation and drives, industrial solutions and services, transportation systems, Siemens building technologies, and OSRAM lighting solutions. In the energy sector, the company provides various solutions for the generation, transmission, and distribution of power, as well as for the extraction, conversion, and transport of oil and gas in the oil and gas industry. Siemens Energy Service delivers service solutions for gas turbines, steam turbines, generators or wind turbines to increase efficiency, reliability and availability throughout the entire lifecycle. From modernizations and upgrades, remote monitoring, lifetime extensions, and condition monitoring to logistical and turnkey service for onshore and offshore wind turbines, Siemens energy services work to achieve maximum success and efficiency. In the healthcare sector, Siemens develops, manufactures, and markets diagnostic and therapeutic systems, devices, and consumables, as well as offers IT systems for clinical and administrative purposes. Other services include technical maintenance, professional, and consulting services. Siemens AG offers IT solutions and services, primarily information and communications systems. Further, the company provides financial products and services comprising commercial finance, equity and project finance, treasury and investment management, and project and export finance. Siemens AG offers insurance solutions, such as claims management, as well as acts as a broker of company-financed insurances for employees on business trips and foreign assignments. The company has equity investments in Nokia Siemens Networks B.V., a telecommunications infrastructure company; and BSH Bosch und Siemens Hausgerate GmbH, a household appliance producer.

AT&T Inc. is a modern media company whose mission is to inspire human progress through the power of communication and entertainment. They bring together premium video content, a large base of direct-to-consumer relationships, high-speed networks optimized for video and advertising technology to lead the next revolution in technology, media and telecommunications. AT&T has recorded 35 consecutive years of quarterly dividend growth and is a Fortune 10 company.

The Boeing Company is an American multinational corporation that designs, manufactures and sells fixed-wing aircraft, rotorcraft, rockets and satellites and provides leasing and product support services. Boeing is among the largest global aircraft manufacturers, is the second-largest aerospace & defense contractor in the world based on 2012 revenue and is the US' largest exporter by dollar value. Boeing stock is a component of the Dow Jones Industrial Average. The Boeing Company's corporate headquarters are located in Chicago and the company is led by Chairman and CEO James McNerney. Boeing is organized into five primary divisions: Boeing Commercial Airplanes (BCA), Boeing Defense, Space & Security (BDS), Engineering, Operations & Technology, Boeing Capital and Boeing Shared Services Group. Boeing is the world's largest aerospace company and leading manufacturer of commercial jetliners and defense, space and security systems. A top U.S. exporter, the company supports airlines and U.S. and allied government customers in 150 countries. Boeing products and tailored services include commercial and military aircraft, satellites, weapons, electronic and defense systems, launch systems, advanced information and communication systems, and performance-based logistics and training. Boeing has a long tradition of aerospace leadership and innovation. The company continues to expand its product line and services to meet emerging customer needs. Its broad range of capabilities includes creating new, more efficient members of its commercial airplane family; integrating military platforms, defense systems and the warfighter through network-enabled solutions; creating advanced technology solutions; and arranging innovative customer-financing options. With corporate offices in Chicago, Boeing employs more than 170,000 people across the United States and in 70 countries. This represents one of the most diverse, talented and innovative workforces anywhere. More than 140,000 employees hold college degrees -- including nearly 35,000 advanced degrees -- in virtually every business and technical field from approximately 2,700 colleges and universities worldwide. Our enterprise also leverages the talents of hundreds of thousands more skilled people working for Boeing suppliers worldwide. Boeing is organized into two business units: Boeing Commercial Airplanes and Boeing Defense, Space & Security. Supporting these units are Boeing Capital Corporation, a global provider of financing solutions; the Shared Services Group, which provides a broad range of services to Boeing worldwide; and Boeing Engineering, Operations & Technology, which helps develop, acquire, apply and protect innovative technologies and processes. Divisions: - Boeing Defense, Space and Security - Boeing Commercial Airplanes - Boeing Capital Corporation - Boeing Shared Services Group - Boeing Engineering, Operations & Technology

Northrop Grumman Corporation (NYSE: NOC) is a leading global security company whose 120,000 employees provide innovative systems, products, and solutions in aerospace, electronics, information systems, shipbuilding and technical services to government and commercial customers worldwide.

Headquartered in Burlington, North Carolina, LabCorp is a leading global life sciences company serves a broad range of customers including biopharmaceutical companies, managed care organizations, governmental agencies, physicians, hospital and health systems, employers, patients, independent clinical laboratories, and more. The company employs nearly 60,000 employees worldwide and strives to uphold its mission to improve health and lives by delivering world-class diagnostic solutions and bringing innovative medicines to patients faster.

AECOM is a global provider of professional technical and management support services to a broad range of markets, including transportation, facilities, environmental, energy, water and government. With approximately 45,000 employees around the world, AECOM is a leader in all of the key markets that it serves. AECOM provides a blend of global reach, local knowledge, innovation and technical excellence in delivering solutions that create, enhance and sustain the world's built, natural, and social environments. A Fortune 500 company, AECOM serves clients in more than 150 countries and had revenue of $8.0 billion during the 12 months ended March 31, 2014.

The Day & Zimmermann is a privately held company in the fields of construction, engineering, staffing and ammunition manufacture, operating out of 150 locations worldwide. Its corporate office is at 1500 Spring Garden Street in Philadelphia, Pennsylvania.

The RMR Group Inc. is a holding company, and substantially all of its business is conducted by its majority-owned subsidiary, The RMR Group LLC. The RMR Group LLC is an alternative asset management company that primarily provides management services to publicly traded REITs and real estate operating companies. As of September 30, 2019, The RMR Group LLC had $32.8 billion of real estate assets under management, including over 2,200 properties, and employed approximately 600 real estate professionals in more than 30 offices throughout the United States; and the companies managed by The RMR Group LLC collectively had nearly 50,000 employees. The RMR Group Inc. is headquartered in Newton, Massachusetts.

Covance Inc. is a global contract research organization recognized for being the world's most comprehensive drug development company. It has a team of professionals that are dedicated to advancing healthcare and delivering fast and innovative medical solutions to patients and healthcare providers. The company also offers laboratory testing services to the chemical, agrochemical, and food industries. It is also a market leader in central laboratory, toxicology, and discovery services.

Medfusion is a healthcare IT company obsessed with improving the patient experience simplifying patient-provider communications and driving financial and operational efficiencies for providers. Whether you choose to enable patient self-scheduling for all or just a portion of your open appointments, you'll be amazed at how much of your staff time, and cost, is reduced.

The Allstate Corporation protects people from life's uncertainties with more than 113 million proprietary policies. Allstate offers a broad array of protection products through multiple brands and diverse distribution channels, including auto, home, life and other insurance offered through its Allstate, Esurance, Encompass, SquareTrade and Answer Financial brands.

Leidos is an American defense company headquartered in Reston, Virginia that provides scientific, engineering, systems integration, and technical services. Known throughout the industry for maintaining the highest standards of integrity and ethical behavior, Leidos works extensively with the United States Department of Defense, the United States Department of Homeland Security, and the United States Intelligence Community, including the NSA, as well as other US government civil agencies and selected commercial markets.

For more than 100 years, business, government, and military leaders have turned to Booz Allen Hamilton to solve their most complex problems. They trust us to bring together the right minds: those who devote themselves to the challenge at hand, who speak with relentless candor, and who act with courage and character. They expect original solutions where there are no roadmaps. They rely on us because they know that—together—we will find the answers and change the world.

KBR is headquartered in Houston, Texas, also known as the energy capital of the world. They employ approximately 27,000 people worldwide in regions that include the Americas, Africa, Asia-Pacific, Australia, Europe and the Middle East. A technology-driven engineering, procurement and construction company, KBR delivers a wide range of services through these business units: Oil & Gas; Downstream; Technology; Infrastructure, Government and Power (IGP) Americas; IGP Europe, Middle East and Africa; IGP Asia Pacific; IGP North American Government and Logistics; Canada Operations; U.S. Construction; Building Group; Industrial Services; and Ventures.

Science Applications International Corporation (SAIC) is an American company headquartered in Reston, Virginia that provides government services and information technology support. This innovative company designs, develops, and sustains offerings that empower diplomatic missions, support warfighter requirements, and advance exploration from the ocean floor to outer space. Science Applications International Corporation (SAIC) offers a broad range of services and solutions to address their customers' most complex and critical technology-related needs.

CACI International Inc is an American multinational professional services and information technology company located in Arlington, Virginia, United States. Their services provide support for national security missions, government intellegence, defense and federal civilian customers. Awarded as a "Fortune World's Most Admired Company." They offer career opportunities for military veterans and industry professionals aid the nation's most critical missions. Their slogan is "Information deployed. Solutions Advanced. Missions Accomplished.

Inova Translational Medicine Institute (ITMI) is a not-for-profit research institute that applies genomic and clinical information from individuals to develop innovative methods for personalized healthcare. ITMI is part of Inova Center for Personalized Health (ICPH), which connects researchers, clinicians, and consumers to integrate genomic research for patient care, prevention, and wellness. This approach enables individuals to live longer and transforms healthcare from reactive to predictive. Research studies at ITMI generate a large genomic and clinical data set that can be used by researchers in a variety of fields, from computational biology to psychology, and biomedical research applications. ITMI's utilizes genomic information from an individual to understand the onset of disease, leading to the implementation of preventative medicine, and to increase successful outcomes while reducing adverse reactions to treatment.

Parsons, an engineering, construction, technical, and management services firm with revenues of $3.1 billion in 2014, is 100% owned by the Employee Stock Ownership Trust. Parsons is a leader in many diversified markets with a focus on defense/security, industrial, and infrastructure. We conquer the toughest logistical challenges and deliver design/design-build, program/construction management, and other professional services packaged in innovative alternative delivery methods to federal, regional, and local government agencies, as well as to private industrial customers worldwide. Currently, more than 15,000 Parsons employees are engaged in nearly 5,000 projects in 29 countries. These dedicated workers speak more than 80 languages collectively, and hold more than 11,800 college degrees and professional registrations. Parsons' employees continue to go anywhere in the world, meet every technical and management challenge, and persevere until the job is done. Parsons has been combining strong forward-thinking and cutting-edge technology to improve the way people connect with the world for 70 years. Our success has been in striking the balance between big ideas and the technical ability to bring them to life. Thanks to Parsons' global network of resources, we have the power to combine leading-edge technology with unparalleled quality and control. We back it all up with an unwavering commitment to safety for domestic and international projects of any scale, under any conditions. All across the world, at every time of day, Parsons is keeping people moving toward a brighter, safer world.