Looking for experienced biller with Athena

I am looking for a part-time biller who is highly proficient in Athena and can work claim denials. This is for a family practice clinic so would also need to be experienced with that specialty. Must be able to work independently. I am unable to train because I do not have experience with Athena so you must already know what you are doing. Opportunity for more work dependent upon the billing software you are experienced in so please list those as well.