A stabilizer arm for a BVM resuscitator and method of use is disclosed. The stabilizer arm provides the necessary support to the reservoir bag to enable the user to exert downward pressure on the BVM resuscitator while simultaneously squeezing the reservoir bag, and creates force that is focused, directed, and realized at the mask of the assembly. Due to the presence of the stabilizer arm, this pressure pushes the facial mask downward to assist in forming a tight mask to face seal. The stabilizer arm may be internal, external or integrated into the reservoir bag wall of the BVM resuscitator and may be retro-fitted or original equipment manufactured. The external stabilizer arm may be designed to engage the outlet port neck of the BVM resuscitator with an open collar or a closed collar. The internal stabilizer arm may be configured to fit BVM resuscitators having single piece or multiple piece outlet valve design.