Embraer Undifferentiated or Other Model
Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Multiengine
Flight Crew Last 90 Days 100; Flight Crew Total 4600; Flight Crew Type 205
Situational Awareness; Communication Breakdown
Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action
Human Factors
We were operating within Class E airspace in and around the town from 2;000 ft AGL to 10;500 ft MSL from XA:00- XC:00 PST in support of [military] close air support operations. After a simulated air-to-ground profile at approximately XB:25 PST we climbed back up to 9;000 ft MSL and re-established a level left-turn orbit over the town. Prior to the profile; the airspace within 8NM of the town was clear of all traffic as indicated via ADS-B. At approximately XB:27 PST after entering or orbit; I observed rapid movement to my right and slightly high and was able to quickly identify a C-172 flying straight and level on a westerly heading directly above our aircraft. I immediately banked hard left; descended rapidly; and checked ADS-B. The C-172 track indicated yellow and 300 ft+. After confirming positive de-confliction; I maintained visual on the C-172 until it was out of sight to the west. The C-172 never reacted and I believe never saw me.
Pilot reported a near mid air collision and maintained separation to avoid additional conflict.