Citation X (C750)
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Other / Unknown
Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural FAR
Air Traffic Control Issued New Clearance; Flight Crew Took Evasive Action
Human Factors
As PIC; I was taxiing the aircraft from the left seat and noticed as we were making our way down Taxiway Alpha a low wing Beechcraft or Cessna taxiing at a high rate of speed on Delta; from right to left.  Neither of us had heard the aircraft come up on Ground to get a taxi clearance.  As we crossed Runway 34; it was pretty apparent that the Beechcraft had no intention of stopping requiring us to lock up the brakes and come to a stop with our nose across taxiway Delta. The Beechcraft finally came to a stop and came up on Ground frequency as Ground was trying to get a hold of him.  I asked my partner if we could get passed the aircraft and he said no; that the wingtip would come in contact with their aircraft.  At this point Ground asked if we could get by and my partner replied; 'No;' at which time Ground wasn't sure as to what to do; the BE33 pilot responded that they could get around our nose.  When cleared to proceed he turned hard right; hugging the edge of the taxiway and taxied around our nose with minimal clearance.  I'm not sure what the pilot was thinking as he taxied down Delta; but he had his eyes set on going where he was going and came literally within two feet of either running into our fuselage or our wing going through his aircraft.  Luckily we both were paying attention and were able to avert the collision.  At first I thought for sure that the Beechcraft was going to slow and come to a stop; but when this appeared not to be the case; I began riding the brakes crossing Runway 34.  Ground acknowledged that the BE33 had not come up on frequency after landing and had not gotten any clearance for which Ground apologized.  This pilot not only made movement without contact; but they never acknowledged that they made a gross error. Our crew responded appropriately and avoided a collision.  I would recommend that the pilot of this aircraft receive some remedial training on taxi speed; basic communication requirements for movement of an aircraft; and basic scanning of surroundings when taxiing.  The pilot; at a minimum; needs to have a warning of their actions just to make them aware and more cognizant next time they are out taxiing and flying.
CE750 Captain reports a near collision with a BE33 during taxi for takeoff. The BE33 pilot had just landed and proceeded to taxi; on an intersecting taxiway at high speed; without contacting Ground Control.