Missiouk has served as a controller and as an accounting manager for several public and private companies over the past years.
"This is an important addition to the company's management team," said the company in a statement late Monday, citing CEO Alan Shoesmith.
"His experience in various publicly listed mining companies will be of critical importance to Celeste as our board and management moves forward with its corporate and technical development plan."
Last week, Celeste said it had secured means for short-term financing of up to $1 million from its largest shareholder - Liberty Metals & Mining.
The company's board is currently working on a corporate and technical development plan that should position it for a "successful exploration and development program", it said. It plans to announce the details of this plan in the near future, it added.
Earlier this year, the company saw its shares pop after it reported strong drill results from its South Crofty tin project in the UK, with three metres at 2.5% tin equivalent, including one metre at 6.83% tin equivalent.
The drill results are from the underground drill program being carried out by Cornish Minerals in the Dolcoath section of the project. Celeste has an earn-in agreement in place to acquire 100% of Cornish Minerals, which owns South Crofty in Cornwall, England.
Disclosure: I have no positions in any stocks mentioned, and no plans to initiate any positions within the next 72 hours.