In the latest union of Northern Virginia government IT services companies, Calibre Systems Inc. has acquired Spear Inc. Herndon-based Spear, led by co-founder and CEO Richard Pineda, will operate as a wholly owned subsidiary, with Pineda as president, the companies said Tuesday. Terms weren't disclosed. Spear brings a host of IT solutions to Calibre's portfolio, including cyber, analytics and C4ISR, all cornerstones of the federal government's IT modernization push. Alexandria-based Calibre,...