Hello there,
My name is BAALI and I'm an Automation Engineer, from the description of your project, I see that you have already a PLC program that needs modifications and testings, I have a great experience with PLCs especially Mitsubishi, it'll be a pleasure to help you, but I want to assure you that testing do not necessarily need someone to be present for it, it's either good or bad program. So if you're interested please contact me.