CAD files in DXF and step formats

My company is in need of CAD files in DXF and STEP formats for the purpose of manufacturing a part. We need these files to have a high level of accuracy so that there will be no issues with the outcome of the part. The STEP format in particular is essential for ensuring the highest level of accuracy. Any company we work with for this project must have experience with CAD software and a strong sense of precision.