The 50-year-old last week signed a contract extension which will keep him at the Stadium of Light until the summer of 2014, a ringing endorsement of his reign to date.
Bruce said: "I have said it before, with Niall and the owner, the one thing I am not going to do is take that for granted.
"I know we are in a results business and at the minute, I am up against it, so I am not going to take that for granted.
"But they are good people to work for I am very, very fortunate. When I hear stories and see what's happening at other clubs - and I have been in that position as well, let me tell you - then I am very, very fortunate.
"But as I said, I am not going to take that for granted just because we have a working relationship. I must get results and try to keep us moving forward."