field officer 
noun
1A person in an organization with a position of responsibility involving practical activities in a particular area or region.The brouhaha led to the adoption of the ‘Torricelli principle,’ which required that a top CIA official rather than a field officer approve the hiring of informants with less than Boy Scout backgrounds....
- The funds will be administered by Anna Gomez, a local field officer with the Australian arm of the international aid organisation Compassion.
- John Oates, a field officer with the Catholic Education Commission, said: ‘Catholic schools have served Scotland well for a very long time.’
2 Military A major, lieutenant colonel, or colonel.Troops could be combined, initially on an ad hoc basis, under the command of one of the regiment's field officers or a senior captain, to create a more substantial grouping, the squadron....
- Its curriculum is designed to develop Operations career field officers with a warfighting locus for battalion and brigade command and division through echelons-above-corps staff officer positions.
- Following the wargame and further updating of the concept, the next steps planned were gaining further insights and guidance from the JIC's general officer sponsors, followed by general officer and field officer staffing.