That's right!
Let's examine why.
The award of the contract to DEF Computer Corporation (or any other offeror) will have a direct and predictable effect on the company in which you and your spouse own stock. As part owners of DEF corporation, you have a financial interest in anything that affects the company.
You can't participate "personally and substantially in this particular matter...it's a conflict of interest. Therefore, you may not participate on the advisory panel unless your disqualification has been waived.
Excellent!
Now, let's move on to the subject of "representation."