ManTech Schedules Fourth Quarter Fiscal Year 2018 Earnings Release and Conference Call for February 20, 2019

ManTech International Corporation (Nasdaq: MANT) will issue its fourth quarter fiscal year 2018 earnings press release after close of market Wednesday, February 20, 2019. Management will discuss financial results in a conference call beginning at 5 p.m. Eastern.

Analysts may participate in the conference call by dialing (877) 638-9567 (domestic) or (253) 237-1032 (international) and entering passcode 3146346. The conference call will be webcast simultaneously to the public through a link on the Investor Relations section of the ManTech website (http://investor.mantech.com). A replay of the conference call will be available on the ManTech website approximately 2 hours after the conclusion of the call.

About ManTech International Corporation

ManTech provides mission-focused technology solutions and services for U.S. defense, intelligence community and federal civilian agencies. In business more than 50 years, we excel in full-spectrum cyber, data collection & analytics, enterprise IT, systems and software engineering solutions that support national and homeland security. Additional information on ManTech can be found at www.mantech.com.

ManTech-F

ManTech International Corporation

Investor Relations

Judy Bjornaas	Stephen Vather
Executive Vice President and CFO	Executive Director, Corporate Development
(703) 218-8269	(703) 218-6093
Investor.Relations@ManTech.com	Stephen.Vather@ManTech.com