A walker by a mobility impaired disabled user while moving through a set of movements correlating to a walking motion. The walker comprises an exoskeleton, a power source in the form of a battery pack or other similar onboard power pack together with its associated power supply cables, and a control system The exoskeleton comprises a rigid pelvic support member including a pelvic harness and a pair of leg structures Each of the leg structures comprise an upper leg structural member, a lower leg structural member, a foot member, a main hip actuator, a knee actuator and a main foot actuator.