I had a few concerns regarding a coworker who also does my same job but at a different site.  Last year we both attended a training together and the whole time we were there she spent a lot of time promoting a particular method that is used in our field.  At the time I wasn't using it, but she was.  The whole conversation put me ill at ease because she kept harping over and over that this method needed to be implemented at my site.  

I later heard from several different people that she was petitioning our mutual boss regarding the method.  In a round about way it sounded like she was trying to get our boss to switch our sites.  I like my site and everyone else knows that her site isn't desirable.  At the time I struggled for a few days worried that I would get switched if she was able to convince my boss to do so.  I came to conclusion that if the switch did happen I would do my job the best I could at the other site, but make sure that she did not push off work meant for her on to me, maintaining boundaries.    

Our boss didn't end up switching us and I was grateful, but I came to find out from my boss that my coworker was indeed pressuring her to implement the method. 

My coworker has been at my job for 12 months now.  I had a phone call to her this past week to inquire about getting some help from her in the future if it got really busy.  She was less than receptive.  She was angry about a rumor, that somebody else started regarding a completely different topic unrelated to our phone call, and of course turned the phone conversation back to the insistence of her "method." Then she berated me for now knowing some industry knowledge.  I thanked her for her advice and quietly got off the phone without arguring back. 

I am still going to be at my current site for now.  I decided that I'm going to make it work without her help, even when it gets really busy.  The less I have interaction with her, the better.  I have dealt with people like her before and it's best to engage them as little as possible but show that you, yourself are a quality worker.  

I am still worried about my position because the boss I share with her is transferring.  That means we will have a new boss.  There will be someone new that I'm sure my coworker will start to pressure.  I know my direct supervisor at my site is happy with my work and wouldn't want to see me switch sites, but the ultimate decision is not up to my immediate supervisor. It will be up to whomever is hired to replace my boss.  

I have gone over it several times in my head since Thursday trying to come up with a plan of action for myself.  I know I won't have any control over what happens in the future with the new boss.  The new boss may switch us or he/she may not.  

While thinking about turning the attention back to myself and what I can control, I decided to invest a small amount of my own money and time to get some additional training.  There are several extra certifications I'd like to pursue to make myself more marketable.  If I do get switched to a new site and find that my coworker is pushing extra work on to me, with our boss allowing her to do so, I want to have an out.  These extra certifications could easily transfer over to the public sector and make me highly desirable to private employers.  If push comes to shove, I'll be comfortable leaving.  

I have always been committed to providing the best work I can possibly do and I will continue to focus on that for now.  The extra trainings will be good for helping me to continue to do good quality work.  Plus, I won't end up being a one-trick pony like her.