Where to Get Help
The issues that arise when Government and contractor employees interact can be quite complex and no training course is going to give you the comprehensive answers for every question you might have.
Here are a few web links from the United States Office of Government Ethics (OGE) that you might find helpful:
Ethics and Working with Contractors---Questions and Answers
List of agency "Designated Agency Ethics Officials"
In addition, feel free to explore the Office of Government Ethics main web site for additional information on ethics issues such as:
Link to Office of Government Ethics Home Page