Copy Editor / proof reader

We are an art work company and are looking for freelancers with good command over American English, especially grammar, spelling & vocabulary usage. Previous experience in proof reading or copy editing is required. Job specification: Copy sheets and the work file will be given and we need the selected person to proof read and edit the file to match with the copy sheet. 100% accuracy is expected. This is a long term requirement and samples will be provided to the selected freelancer.