HERNDON, Va., Jan. 11, 2021 (GLOBE NEWSWIRE) -- ManTech International Corporation (Nasdaq: MANT) will issue its fourth quarter fiscal year 2020 earnings press release after close of market Wednesday, February 17, 2021. Management will discuss financial results in a conference call beginning at 5

HERNDON, Va., Dec. 14, 2020 (GLOBE NEWSWIRE) -- ManTech International Corporation (Nasdaq: MANT) has completed the acquisition of Tapestry Technologies, a leading provider of advanced cyber solutions. Headquartered in Chambersburg, Pennsylvania, and founded in 2005, Tapestry Technologies offers a

HERNDON, Va., Dec. 03, 2020 (GLOBE NEWSWIRE) -- ManTech (Nasdaq: MANT) has won a five-year $273 million contract with the Department of Homeland Security to provide Business Intelligence Support Services (BISS) that advance Customs and Border Protection (CBP) capabilities to preempt acts of crime