Medium Transport; Low Wing; 2 Turbojet Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 4
Situational Awareness; Distraction; Confusion; Time Pressure
Conflict Airborne Conflict; Deviation - Altitude Excursion From Assigned Altitude; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Separated Traffic; Air Traffic Control Provided Assistance
Human Factors; Procedure
Aircraft X released from VNY airport.  Aircraft X airborne reported out of 1;700 for 4;000 per SID; radar ID'd and told to climb and maintain 14;000 feet.  Released Aircraft Y from BUR airport.  Aircraft X doesn't follow SID; flies runway heading level at 1;700.  Issued follow up instructions to climb and maintain 14;000 with an expedite thru 5;000 for terrain and turn left to 320.  Aircraft X slowly starts his turn but stays level causing a Low Altitude alert to happen.  Issue a low altitude alert to Aircraft X and told to climb and turn immediately.  Aircraft Y departs BUR leaving 1;700 for 4;000 as well.  Turn Aircraft X southbound to avoid Aircraft X.  Called traffic to Aircraft X and Aircraft Y to each other and got visual separation from both but unsure if I had standard separation before getting visual separation.  Aircraft X turned and slowly climbed and both aircraft proceeded without further incident.Have Aircraft X follow the SID reference headings; altitudes; and takeoff minimums for climb out.
SCT Controller reports of an aircraft that departs but doesn't follow the SID on climbout. Aircraft turns slowly causing a loss of separation with another aircraft departing a close proximity airport.