36 : McKean Defense Group
| Location: | Philadelphia |
| Annual growth rate: | 81.49% |
| 2010 revenue: | $48,958,143 |
| 2009 revenue: | $35,236,264 |
| 2008 revenue: | $23,237,711 |
| 2007 revenue: | $10,952,912 |
| 2006 revenue: | $4,512,816 |
| Leadership: | Joseph L. Carlini, CEO |
| Number of employees: | 321 |
| Web site: | http://www.Mckean-defense.com |
| Major customers: | Naval Surface Warfare Center, NAVSEA, NSWC Crane, Commander Naval Regional Maintenance Center and SUFOR |