Reading this page on my mirror counterpart is most illuminating. It seems I, or rather she, held a more covert role working against the tyrannical Terran-Cardassian Alliance. As a scientist and combat medic for the spy organization Memory Omega, she engaged in risky intelligence gathering missions. 

Her cunning and skills at subterfuge allowed her to infiltrate even the Excalibur under a Romulan alias. There she advised Captain Calhoun, though found his brutality ill-suited for Memory Omega's g