As previously announced, he will share the role with Alexander Abramov following the cash injection into Tethys by Olisol.
The company has set a date of May 31 for its annual general meeting. Directors John Bell, David Henderson, David Roberts and Jim Rawls have all indicated they will not stand for re-election.
The Kazakhstan-focused oil and gas junior confirmed earlier this month that Olisol would provide it with a $15mln convertible debt facility and convert most of Tethys's existing debt under an interim financing into Tethys shares.
It is expected that once all of the refinancing is completed, including a share placing, Olisol will own around 42% of Tethys.