Stock Trading History of Dorland Gary A

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Dorland Gary A since year 2005. The trader's CIK number is 1310093. At the time of this reporting, Dorland Gary A is the President Div./Business unit of Mantech International Corp (stock ticker symbol MANT).

Stock purchases, sales, and option exercises reported by *Dorland Gary A* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-08-17	MANT	Mantech International Corp	Sale	15,000	36.00	540,000
2007-08-17	MANT	Mantech International Corp	Option Exercise	15,000	27.01	405,150
2006-11-20	MANT	Mantech International Corp	Sale	10,000	35.87	358,700
2006-11-20	MANT	Mantech International Corp	Option Exercise	10,000	22.47	224,733
2006-05-12	MANT	Mantech International Corp	Sale	10,000	36.27	362,700
2006-05-12	MANT	Mantech International Corp	Option Exercise	10,000	21.74	217,350

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Dorland Gary A (President Div./Business unit of Mantech International Corp at the time of this reporting) see the Securities and Exchange Commission (SEC) website.