Helium One Global Ltd non-executive director Russel Swarts has stepped down with immediate effect.
Mr Swarts has decided to focus on his other interests.
Non-executive chairman James Smith said: “The board would like to take this opportunity to thank Russel for his significant contribution both as a board member and as part of the senior management team and wish him well on all his future endeavours.”
The company has helium licences in Tanzania and the USA.