GUI modifications and development needs using .NET / C# and windows forms

We are needing a high level expert in .NET and C# for our GUI platform. This has been a long term evolution platform that needs modifications & development help. The expert we are looking for needs to be skilled in:
.NET
C#
Windows Forms
SQL
PLC Programming (AB, Omron, Siemens, Beckhoff)
Machine Vision Experience a +

Thank you for your time