Smith, along with David Warner, has been banned from worldwide and domestic cricket by Cricket Australia for 12 months, with Cameron Bancroft receiving a nine-month ban, for his role in the ball tampering episode in Cape Town.
Steve Smith is ready to "get back into it" after returning to Australia but knows he has "a lot to do" to earn back the trust of the public following the ball-tampering scandal.
David Warner and Cameron Bancroft were also banned for their participation, but it was Smith who received the most backlash from an irate Australian public.
"It's great to be back home in Australia", Smith said in the post.
"He (Langer) has got a really good group of players and they'll play in an exciting way, and I'm really looking forward to watching them do that", said Lehmann.
They will have served their 12-month bans before the World Cup gets underway at the Oval on May 30 but many wonder if Australia, under an as yet unidentified captain, can defend the title they won on home soil three years ago. I've seen first-hand the way he's been able to mould the Western Australia team", Voges told BBC World Service's Stumped programme."He'll make sure they'll be competitive and you'll certainly see some behavioural changes."What about the banned players?"
Smith breaks silence in return from exile
The bans prevent the trio from playing worldwide or Australian domestic cricket, although there is nothing stopping them from signing with an English county side. "The plan has allowed us to consider several worthy candidates, but Justin was the clear standout, particularly based on his recent coaching and player development achievements", he said.
Steve Smith and vice-captain David Warner were suspended by Cricket Australia.
"If we can keep mentoring them and helping them, and they want to keep getting better and they want to meet the standards of the Australian cricket team, then of course they'll (all) be welcomed back".
"I loved them and, and JL will love working with them".
The 47-year-old, who played 105 Tests and eight one-day internationals for his country, added: "One of the key values for me is learning from the past".
In his press conference, Langer had identified Australia's next Test tour of India as the biggest challenge facing the team, describing how his own experience as part of the winning team in 2004 was his 'Mt Everest moment', something he has maintained through the years. "I would say, without being in it (at South Africa), camaraderie wasn't as right as it needed to be.
It will run in tandem with a separate probe announced last month into player behaviour.