The Manchester United legend has been serving as one of four interim coaches for the Rams alongside Liam Rosenior, Shay Given and Justin Walker following Phillip Cocu’s dismissal earlier this month.
But Rooney is expected to take a leading role when Derby take on fellow Championship strugglers Wycombe on Saturday.
The 35-year-old is still employed on a player-coach contract but is likely to take himself out of the squad for this weekend’s game at Pride Park.
Derby are without a win in their last nine matches and are marooned at the bottom of the Championship table after 13 games.
With the Rams yet to make a decision on their long-term coach, Lampard, who made his first foray into management with the Midlands club in the 2018/2019 season, offered some key advice to his former England team-mate Rooney over the job.
‘Do it, go for it, although you have to do it with everything you’ve got,’ the Chelsea boss told the Athletic. ‘It’s not a job where you can say, ‘Ah, I’ll see how it goes’. You have to throw yourself into it.
‘The first day I walked into Derby, I was sh*tting myself. I really was. It came upon me so quickly. I met Mel Morris, the owner. I was offered the job which was a big leap for him and a big leap for me.
‘I’d played against a lot of the players. I played with some of them for my country. It’s how you package that first meeting, that first training session, of what you want to be. It’s so important. I had all those worries.
‘Maybe we’ve been dug out because we can’t defend set pieces, so the next day I go into work and say quietly, ‘I want to have a look at set pieces one more time!’ I like listening to other managers, podcasts of other coaches.
‘If I can take bits from that, I will. You’ve got to be yourself, but you can still suck all that stuff in.’