Heavy Machines Army Pfc. Mathew Sicard, a power distribution specialist assigned with the Army Corps of Engineers, removes a tree branch to clear a path to work on power lines in Rio Grande, Puerto Rico, in 2017. The Defense Logistics Agency uses category management principles to consolidate contracts for common goods used by agencies. SHARE: Download: Full Size (5.03 MB) Credit: Army Pfc. Deomontez Duncan VIRIN: 171025-A-PL947-977M.JPG Photo Gallery