RCB will have to play five games inside 13 days against MI (away), Delhi Capitals (home), Rajasthan Royals (away) and Punjab Kings (home).
Bobat also backed England all-rounder Will Jacks to come in handy.
Joseph was one of our top three targets, says RCB Director of Cricket Mo Bobat
"We're deeply grateful for the swift coordination and support from the BCCI, local authorities, and the police who made this possible," the RCB statement added.
Indian wicketkeeper-batter Dinesh Karthik will work with England Lions' as batting consultant for a brief period of nine days when the side will tour India.
RCB were adamant to get a good bowling attack, it was a huge first step in winning IPL: Andy Flower
'The next objective is to make sure we create the right performance, and culture where the players can really go and showcase what they are capable of, and go out and entertain the public.'
'Coaching at a professional level is incredibly exciting for me and is something I'm truly passionate about as a new chapter in my life. Hopefully, the breadth of my experiences as a player can contribute to the development of the group and bring added value.'
Royal Challengers Bangalore began their pre-tournament camp without their numero uno Virat Kohli, who might take a few more days to join before the team starts its IPL campaign against reigning champions Chennai Super Kings on March 22.
Newly-appointed Royal Challengers Bengaluru captain Rajat Patidar on Thursday said he would want to pick talisman Virat Kohli's brains to learn the nuances of leadership and stressed on the importance of "standing with players" in all circumstances.
'The more number of times you reach the playoffs, the probability of winning the championship is quite near.'
'Our plan was simple... use his (Mayank) space against him'
A wave of high-profile player releases, including four prominent captains -- Shreyas Iyer, K L Rahul, Rishabh Pant, and Faf du Plessis -- has reshaped the landscape of the league.
The ECB statement did not say if the players would be returning for group training sessions with social distancing protocols in place. England cricketers returned to individual skill-based training last week.
The three roles attracted a high calibre of applicants and were subject to a rigorous recruitment process. As part of the move, Lewis will vacate his role as Young Lions head coach, and this role will be reconfigured into an Elite Pathway Coach role.
There could be some eye-popping deals for players, who would have struggled otherwise to attract attention in the mega auction.
