HS 125 Series
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 40; Flight Crew Total 12500; Flight Crew Type 2000
Situational Awareness
Conflict NMAC
Flight Crew Took Evasive Action
Human Factors
On a re-positioning flight to RYY at 3000 ft Atlanta ATC cleared us for a visual approach to Runway 27. Shortly after; ATC called traffic for us at 1000-1100 o'clock and 2500 ft. I saw the traffic on TCAS but at this time had no visual. Watching said traffic on TCAS; I saw it go from 500 ft below to 400; 300; 200. TCAS gave us an RA and I complied. As I climbed; I got a visual on the aircraft. Though I saw the aircraft; I continued complying with the RA until we were at approximately 3800 ft. I asked ATC who the aircraft was and they told us they were not talking to them. While I realize he is running a business and we all share the airspace; keeping your 'head on a swivel' is definitely something everyone should practice. In his type of operation; I would suggest that he keeps open communications with Atlanta and local towers.
HS125 Captain reported an NMAC on arrival into RYY.