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Providing protection against the hazards of space radiation is a major challenge to the exploration and development of space. The great cost of added radiation shielding is a potential limiting factor in deep space missions. In the present report, we present methods for optimized shield design over multi-segmented missions involving multiple work and living areas in the transport and duty phase of lunar and Mars missions. The total shield mass over all pieces of equipment and habitats is optimized subject to career dose and dose rate constraints.