Does engineering mean computer engineering, do they do research related to digital technology.
Do they know your work well? In what capacity do they know you?
If they’re in other engineering field not related to digital technology, they won’t be an appropriate recommender for this application.
You should avoid doing so. An applicant for this visa is expected to know a network of experts both in organisations they’ve worked and outside. So you need to have a good representation of external experts in your LoR. Having two people from the same organisation where you’ve worked is not recommended.