Greater Northside Management District provides supplemental and proactive patrols for all businesses within our boundaries (7 days/week, 4 shifts/day). We only use Texas Certified Officers from HPD, METRO, DPS and/or Harris County. District business owners may call us at 713-229-0900 to obtain the numbers to directly contact the officers during their GNMD shifts. Year-to-Date (YTD) Safety Patrol: