On Assignment (NYSE: ASGN) has agreed to purchase Fairfax, Virginia-based technology and engineering firm ECS Federal for $775 million from

Jeff Shockey, formerly vice president of federal and international affairs at Boeing (NYSE: BA), has been appointed VP of global

Raytheon (NYSE: RTN) has received a potential 20-year, $572.3 million contract to modernize and support the Canadian armed forces’ radar-guided

Julie Gravallese, formerly chief human resources officer of Mitre, has been named vice president of programs and technology integration at the McLean,

Bill Varner, former group president at ManTech International (Nasdaq: MANT) and a four-decade industry veteran, has joined the board of directors

Andrew Boyd, a founding partner of veteran-owned company McIntire Solutions, has joined Unisys (NYSE: UIS) as group vice president for defense and intelligence

Lockheed Martin (NYSE: LMT) has secured a potential $459.2 million contract modification from the Missile Defense Agency to manufacture additional

Serco Inc., the British contractor’s North American business, has wrapped up its acquisition of Ludlow, Massachusetts-based technology and professional services contractor BTP

Vince Stammetti, formerly a vice president of Alion Science and Technology, has been named senior VP of the company’s systems solutions

Subsidiaries of BAE Systems, General Dynamics (NYSE: GD) and Huntington Ingalls Industries (NYSE: HII) have received contract modifications worth a