This list is not finalized - companies may cancel or register in the days leading to Expo; however, there will be no drastic changes.
| Company | Attending Tuesday | Attending Wednesday |
|---|---|---|
| AAI Corporation/Textron Systems | Yes | Yes |
| ALCOA | Yes | Yes |
| AREVA | Yes | No |
| ATEC/AEC | Yes | Yes |
| Aberdeen Test Center | No | Yes |
| Accenture | No | Yes |
| Adaptive Methods | Yes | No |
| AeroVironment Inc | Yes | No |
| Aerojet | No | Yes |
| Allegheny Energy | No | Yes |
| Alliance Engineering | Yes | No |
| Alliant Techsystems | No | Yes |
| Allied Associates International, Inc. | No | Yes |
| Altec Industries, Inc. | Yes | No |
| American Bridge | Yes | No |
| American Contracting & Environmental Services | No | Yes |
| American Electric Power (AEP) | Yes | No |
| American Woodmark Corporation | No | Yes |
| Amtrak | Yes | No |
| Analog Devices, Inc. | Yes | No |
| Analytical Graphics, Inc. | No | Yes |
| Anderson & Associates, Inc. | Yes | No |
| Andrew Wireless Network Solutions, a CommScope Company | Yes | No |
| Anheuser-Busch, Inc. | No | Yes |
| Applied Research Laboratory at the Pennsylvania State University | Yes | Yes |
| Argon ST | Yes | No |
| BAE Systems Inc. | No | Yes |
| BBN Technologies | Yes | No |
| BIT Systems | Yes | No |
| BMW Manufacturing Co., LLC | No | Yes |
| Baker Hughes Inc, | No | Yes |
| BakerRisk | Yes | No |
| Barron Associates, Inc. | Yes | No |
| Bechtel Corporation | Yes | No |
| Bechtel Marine Propulsion Corporation | Yes | No |
| Bechtel Plant Machinery, Inc. | Yes | No |
| Black & Veatch | No | Yes |
| Bloomberg | Yes | No |
| Boeing | No | Yes |
| Booz Allen Hamilton | Yes | No |
| Bridgestone Americas, Inc. | Yes | No |
| Bucyrus America, Inc. | Yes | No |
| Bureau of Engraving & Printing | No | Yes |
| CDM | No | Yes |
| CGI | No | Yes |
| CSC (Computer Science Corporation) | No | Yes |
| CapTech Ventures | No | Yes |
| Capital One | No | Yes |
| Celanese | No | Yes |
| Center for Army Analysis | Yes | No |
| Central Intelligence Agency | Yes | No |
| Chicago Bridge and Iron | Yes | Yes |
| Cirrus Logic, Inc | Yes | No |
| Civil & Environmental Consultants, Inc. | Yes | No |
| Clark Nexsen | Yes | No |
| Cliffs Natural Resources | No | Yes |
| Cobham Analytic Solutions | Yes | No |
| Comcast | No | Yes |
| Constellation Energy Group | No | Yes |
| Crane Electronics | No | Yes |
| DCS Corporation | Yes | No |
| DHS, Customs and Border Protection | Yes | Yes |
| DRS Signal Solutions, Inc. | Yes | No |
| Danaher | No | Yes |
| Defense Nuclear Facilities Safety Board | Yes | No |
| Deloitte | Yes | No |
| DeutscheBank | No | Yes |
| Dewberry | Yes | No |
| Digital Receiver Technology, Inc (DRT) | Yes | No |
| Dominion | Yes | No |
| Dow Chemical Company | Yes | Yes |
| Drummond Company, Inc. | Yes | No |
| DuPont | Yes | No |
| Duke Energy | No | Yes |
| ENSCO, Inc. | Yes | No |
| ERG | Yes | Yes |
| Eastman Chemical Company | No | Yes |
| Eaton Corporation | Yes | No |
| Elbit Systems of America | Yes | No |
| Exxon Mobil | Yes | Yes |
| FM Global | Yes | No |
| Fairchild Semi | Yes | No |
| Fast Enterprises, LLC | No | Yes |
| Federal Energy Regulatory Commission | No | Yes |
| Flowserve Corporation | No | Yes |
| Freddie Mac | No | Yes |
| Frito Lay - Aberdeen MD | No | Yes |
| G3 Technologies | Yes | No |
| GES, Inc. | Yes | No |
| General Dynamics Advanced Information Systems | Yes | No |
| General Dynamics Bath Iron Works | No | Yes |
| General Dynamics Electric Boat | Yes | No |
| General Dynamics Robotic Systems | Yes | No |
| General Electric | Yes | Yes |
| Genworth Financial | No | Yes |
| Georgia Pacific | Yes | No |
| Global Strategies Group | Yes | No |
| Goodyear Tire & Rubber | No | Yes |
| Gore | Yes | No |
| Grant Thornton-Global Public Sector | No | Yes |
| Gulfstream Aerospace | Yes | No |
| Harris Corporation | No | Yes |
| High Performance Technolgies, Inc (HPTi) | Yes | No |
| Hughes Network Systems | Yes | No |
| IBM Corporation | Yes | No |
| ITT Corporation / IIW | Yes | No |
| Idaho National Laboratory | No | Yes |
| Ingersoll Rand | Yes | No |
| Innovative Refrigeration System | No | Yes |
| Intel Corporation | Yes | No |
| International Paper | Yes | Yes |
| Jacobs | Yes | No |
| James Posey Associates, Inc. | Yes | No |
| Johns Hopkins University Applied Physics Laboratory | Yes | No |
| Johnson Controls | No | Yes |
| KEYW | No | Yes |
| Koontz-Bryant, P.C. | Yes | No |
| LOWE'S COMPANIES INC. | Yes | No |
| Lafarge | Yes | No |
| Lexmark International | Yes | No |
| Lockheed Martin | Yes | No |
| Lutron Electronics | Yes | Yes |
| M.C. Dean, Inc. | No | Yes |
| MGA Research | Yes | No |
| MIT Lincoln Laboratory | No | Yes |
| MPR Associates | Yes | No |
| MSA | Yes | No |
| MTCSC | Yes | No |
| MWV- MeadWestvaco | Yes | No |
| Mainstream Engineering | Yes | No |
| ManTech, CYBER | Yes | No |
| Maple Leaf Frozen Bakery | Yes | No |
| Marathon Petroleum Company LLC | Yes | No |
| McQ Inc. | Yes | No |
| McQuay International | Yes | No |
| Metron, Inc | Yes | No |
| Michelin North America | Yes | Yes |
| MicroStrategy, Inc. | No | Yes |
| Microsoft Corporation | Yes | Yes |
| Military Sealift Command | Yes | No |
| Missile Defense Agency | No | Yes |
| Montgomery County, Virginia Department of Economic Development | No | Yes |
| NASA/Goddard Space Flight Center | No | Yes |
| NAVAIR | No | Yes |
| NAVSEA Warfare Centers | Yes | No |
| NDSL | No | Yes |
| NIST/BFRL | Yes | No |
| National Ground Intelligence Center | Yes | No |
| National Security Agency | Yes | Yes |
| Naval Research Laboratory | Yes | No |
| Navy Recruiting District | Yes | Yes |
| Near Infinity Corporation | Yes | No |
| New River Valley Economic Development Alliance | Yes | No |
| Newell Rubbermaid | No | Yes |
| Newmont Mining | Yes | No |
| Norfolk Naval Shipyard | Yes | No |
| Norfolk Southern | No | Yes |
| Northrop Grumman Corporation | Yes | No |
| Novartis Vaccines and Diagnostics | Yes | No |
| Nuclear Fuel Services, Inc. | Yes | No |
| O'Brien & Gere | Yes | No |
| Oak Ridge National Laboratory | Yes | No |
| Objective Interface Systems, Inc. | No | Yes |
| Oracle | Yes | No |
| Orbital Sciences | Yes | No |
| Orica USA Inc. | No | Yes |
| Parsons | No | Yes |
| Pepsi Bottling Group | Yes | No |
| PepsiCo - North America Beverages | Yes | No |
| Philip Morris USA | No | Yes |
| Platinum Solution | No | Yes |
| Precision Castparts Corporation | Yes | Yes |
| Proteus Technologies | Yes | No |
| QuantaDyn | No | Yes |
| Quillen VA Medical Center | No | Yes |
| RK&K | No | Yes |
| RTI International Metals, Inc. | No | Yes |
| Rackspace | Yes | No |
| Raytheon Company | Yes | Yes |
| Rincon Research Corporation | Yes | No |
| Rio Tinto | No | Yes |
| Rockwell Collins | No | Yes |
| Rolf Jensen and Associates | Yes | No |
| Rolls Royce | Yes | Yes |
| RoviSys | Yes | No |
| SAIC | Yes | No |
| SFPE | Yes | No |
| SPAWAR Systems Center Atlantic | Yes | No |
| SPX | Yes | No |
| SRA International, Inc | No | Yes |
| SRC, Inc. | No | Yes |
| STIHL Inc. | Yes | No |
| Savannah River Nuclear Solutions | Yes | No |
| Schlumberger | No | Yes |
| Schneider Electric | Yes | No |
| Schweitzer Engineering Laboratories | No | Yes |
| Sebesta Blomberg | Yes | No |
| Sedna Digital Solutions | No | Yes |
| Showbest Fixture Corp | No | Yes |
| Siemens Corporation | Yes | No |
| Southland Industries | Yes | No |
| Stearns&Wheler, GHD | Yes | No |
| Strategic Systems Programs | Yes | No |
| Susquehanna International Group LLp | No | Yes |
| Syngenta Crop Protection | No | Yes |
| TM GE Automation Systems | No | Yes |
| TMA | Yes | No |
| TORC Technologies, LLC | No | Yes |
| Technomics | No | Yes |
| Thales Communications, Inc. | No | Yes |
| The Aerospace Corporation | Yes | No |
| The MITRE Corporation | Yes | No |
| The Shaw Group | No | Yes |
| Thomson & Litton | Yes | No |
| Tindall Corporation | Yes | No |
| Titan America | Yes | Yes |
| U. S. Nuclear Regulatory Commission | Yes | No |
| U.S. Army Corps of Engineers | No | Yes |
| U.S. Department of State-Bureau of Diplomatic Security | Yes | No |
| U.S. Patent and Trademark Office | Yes | No |
| US Air Force | No | Yes |
| US Army Recruiting | Yes | No |
| US Postal Service | Yes | No |
| USG | No | Yes |
| Ulliman Shutte Construction LL | No | Yes |
| Vacon, Inc. | No | Yes |
| Vanguard | No | Yes |
| ViaSat, Inc. | Yes | No |
| Volkswagen Group of America, Inc. | No | Yes |
| Volvo Group North America | Yes | Yes |
| Westinghouse Electric Company | Yes | No |
| Whitman, Requardt & Associates, LLP | Yes | No |
| Wiley|Wilson | Yes | No |
| Zeta Associates, Inc | Yes | Yes |
| comScore, Inc. | Yes | No |