Moon, Elizabeth. Vatta's peace series.

"As Admiral Kylara Vatta learned after she and a ship full of strangers were marooned on an inhospitable arctic island, the secrets she and her makeshift crew uncovered were ones someone was ready to kill to keep hidden. Now, the existence of the mysterious arctic base has been uncovered, but much of the organization behind it still lurks in the shadows. And it is up to the intrepid Ky to force the perpetrators into the light, and finally uncover decades worth of secrets--some of which lie at the very heart of her biggest family tragedy"--