Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 49; Flight Crew Total 9639; Flight Crew Type 3907
Conflict NMAC
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Took Evasive Action
Human Factors
Level at 10;000 ft ATC informed us of traffic at 1 o'clock at 9;000 ft. We did not have the traffic in sight. It displayed shortly after as a white target on TCAS. I reduced my ND (Navigation Display) range and saw it go to amber and indicate 500 ft below us and maybe 300 ft for a moment. I disconnected the autopilot in anticipation for a possible RA which we did get. It was a climb RA followed by a level RA which in total lasted maybe 5-10 seconds until we got the clear of conflict. We followed the RA guidance and saw the traffic as we were conducting the RA. We notified ATC as we climbed and once we had traffic in sight and clear of traffic. We received vectors for an uneventful landing at DEN on [Runway] 34R.
Air Carrier Captain reported a near midair collision during descent to DEN airport.