After a busy 2018, industry experts say they expect continued mergers and acquisitions in 2019 -- but the pace may slow as the year goes on. 2018 brought the close of several big deals, including Northrop Grumman's purchase of Orbital ATK and General Dynamics' acquisition of CSRA . It also brought the announcement of several deals set to close next year, including Science Applications International Corp.'s acquisition of Engility as well as the merger of Harris and L3 Technologies ...