Warriors will now work with Lander, who officiated in 63 internationals including two Rugby World Cups, in a bid to halt the indiscipline slide.
"We've started to work with Steve Lander, the ex-referee, and he is helping us to look at the penalties and yellow cards," said Hill immediately after the defeat.
"He has had one session and he will be with us next week too. We are serious about addressing this and I am hoping that Steve will be able to coach our players to not concede those silly penalties.
"Some of them are silly, it is back foot penalties and not rolling away, there is no excuse for that. That is just lazy and those are dull penalties.
"I want the work we do with Steve over the next few weeks to help us reduce the penalty count, hopefully for Leicester and the next batch of Aviva Premiership games.
He added: "We can't grumble, we have got to look at it because week in and week out we are conceding too many penalties. Some of them are debatable and some of them are dumb.
"We had probably the best referee in the Aviva Premiership today in Wayne Barnes, and we were still penalised too much. We have got to work on that and coach these players to not concede so many penalties.
"I actually thought the yellow for Nikki (Walker) was a fair one. There was an opportunity for them to score and it was an instinctive reaction from him to knock on.
"Everyone would have done the same and stuck a hand out, but there is no doubt it prevented a pass and them possibly scoring. I have no argument with that."