Farhart, who has almost three decades of professional experience, has been roped in to replace Nitin Patel, who had recently resigned due to personal reasons, reports ESPNcricinfo.
Farhart will be joined by Shankar Basu and Arun Kanade, who will be on board as strength and conditioning expert and masseur, respectively.
All three have been handed a one-year contract, with Kanade assuming responsibility in Zimbabwe earlier this month. Farhart and Basu will take charge in Sri Lanka with the three-match Test series starting August 12.