Loudoun’s ICT cluster is broken into four sub-categories: Computer Systems Design & Software, Consulting, Engineering and Tech Services and High-Tech Manufacturing, employing between 15,000 and 20,000 people.
Listed below are the top tech companies in each sub-category, by employment.
| Computer Systems Design & Software |
|---|
| Neustar, Inc. |
| REI Systems, Inc. |
| Telos Corporation |
| Computer Sciences Corp. |
| Collins Aerospace |
| NIITEK Inc. |
| LM Operations Support Inc. |
| Metron Aviation Inc. |
| CACI Inc. Federal |
| Mindshift Technologies Inc. |
| Compusearch Software Systems |
| Technica Corporation |
| Infused Solutions LLC |
| Rose International Inc. |
| Nexgen Communications LLC |
| CIS Secure Computing Inc. |
| Strategic Business Systems Inc. |
| L 3 Unmanned Systems Inc. |
| Innovative Management Con Inc. |
| Advanced Software Systems Inc. |
| Sava Workforce Solutions |
| Austin Info Systems Inc. |
| Anystream Education Inc. |
| Cigital Inc. |
| Superlative Technologies Inc. |
| Infinite Computer Solutions Inc. |
| Engineering and Tech Services |
|---|
| Andrew Corp, Comsearch Division |
| Raytheon Technical Services |
| Alpha Construction & Engineering Corp. |
| Global Wireless Solutions Inc. |
| Boeing Company |
| Audiovisual Washington Inc. |
| Racal Instruments Inc. |
| Science Applicants Intl. Inc. |
| Bohler Engineering VA LLC |
| G E Aviation Systems LLC |
| High-Tech Manufacturing |
|---|
| Northrop Grumman (formerly Orbital ATK) |
| Raytheon Company |
| Dynamic Details Inc. of Virginia |
| EIT LLC |
| DY4 Inc. |
| Sutron Corp. |
Source for all of the above information: Virginia Employment Commission
