I use DDG every day as my default search engine across desktop & mobile. It’s good but the search isn’t as always as helpful as Google. If you need to you can just add !g to the search terms and get redirected to Google.

I feel like someone who has the necessary experience and clearance isn’t going to want to throw that away on case which they will lose and likely be asked to put that clearance at risk by their client within the first 5 minutes.