"I have been asked to serve on an advisory board with a non-education organization - no stipend is involved. It is a STEM organization and I am not a STEM expert. Do I need to file a COC?"
If you are an Investigator, this activity should be disclosed for conflict of interest review if it meets the definition of a Significant Personnel Interest. Significant Personal Interests are any managerial, professional, or Fiduciary Position you (or a Family Member) hold in any outside entity, whether or not you or your family is compensated. This can include officer, director, and board positions.