California  |  Personal Injury

Legally, what can I do about my employee's liable and slander towards me?

I'm a male in my late twenties with eight years of service managing a group of union bargained-for employees ages 20s-60s and years of service 0-30+, in a Fortune 500 company. Office gossip and politics aside, one of them who is in her 50s with 30+ years of service is and has been saying things about me to others in the group, office, and to my peers and superiors that are untrue, unfounded, and I believe inreprehensible. She says I'm doing things to her and others that is age/sex discriminatory and violating union guidelines. This is now affecting my work, business relationships (including with my superiors), job performance; all of which are in serious jeopardy. I am currently seeing an EAP counselor for work-related stress. Is there anything legally I can do to stop her from continually attacking my character with liable and slander? Not all believe her, including her own union and peers, but one of my superiors does. I believe this is effecting my job performance rating - effectively my pay treatment, appraisal and promotability. Do I seek out an ombudsman, lawyer, or both? Help?