A soldier restraint system and method secure a soldier in a vehicle. In one embodiment, the soldier restraint system includes a seat assembly comprising a seat and straps. The soldier restraint system also includes a restraint harness belt. The restraint harness belt is secured to the seat assembly. In addition, the soldier restraint system includes mounting assemblies. The straps attach the seat to the mounting assemblies. The mounting assemblies are securable to the vehicle. Attachment of at least one of the straps to the seat is releasable by a release assembly. The soldier restraint system also includes a strap retractor and a retractor strap. The retractor strap is extractable from the strap retractor. The retractor strap is retractable by the strap retractor. The strap retractor retracts the retractor strap upon achieving a strap threshold.