Complex sentence: Despite his injuries he continued to give instructions to his team, suspecting that further devices may be in the vicinity, and refusing to be evacuated until he was certain that all personnel on the ground were aware of the danger.
Split into simpler sentences: Despite his injuries, he continued to give instructions to his team, suspecting that further devices may be in the vicinity. He refused to be evacuated until he was certain that all personnel on the ground were aware of the danger.