The Independent says Villas-Boas, 33, has begun building up his backroom staff by taking two assistants with him from his former club Porto.
Jose Mario Rocha, 48, will become the physical fitness coach, while Daniel Sousa, 25, is to be the senior opposition scout.
That role at Chelsea is currently occupied by former Ipswich manager Mick McGiven, 60, who worked closely with Villas-Boas when the Portuguese was part of Jose Mourinho's backroom staff and is likely to be given a key role in the new set-up.
Michael Emenalo, who was promoted to assistant first-team coach when Ray Wilkins was sacked, will remain at the club, although he might be given a new role. The Nigerian, considered by many to be the "eyes and ears" of Roman Abramovich, is a contender for the sporting director role vacated by Frank Arnesen, who left last month.