B757-200
Flight Crew Last 90 Days 150; Flight Crew Total 7000; Flight Crew Type 2000
Aircraft Equipment Problem Critical
Flight Crew Landed As Precaution; Flight Crew Diverted
Aircraft
Climbing to cruise altitude Right Bleed EICAS Message followed by a Left Bleed EICAS message. Resulting in loss of both PACKS.  Resulting is CABIN ALT warning message.  We began descent to 10;000 while performing QRH procedures.
[Report narrative provided no additional information].
B757 flight crew experiences a Right Bleed EICAS Message followed by a Left Bleed EICAS message; resulting in loss of both PACKS which results in a CABIN ALT warning. Flight diverts to a suitable airport.