Magnus needs help

An internally developed MRP system has deteriorated since the previous developer moved on and the company made some business changes. We have a need for someone to help us get a number of issues sorted as well as potentially look to add some enhancements. This is a vital system that has a lot of compliance requirements around it (Hence the in-house development). We need someone who can look at the system, learn how it works and then advise on how to move forward with a proper development/test methodology and then get issues fixed, tested and implemented for our team.