The companies share an executive team and Davidson filled the CFO position for eight years.
A spokesman for Avino contacted Mining Journal on January 23 to say Davidson had been dismissed.
Neither company gave any reasons for his sudden departure at the time.
Both said the strong finance team would effectively manage the transition to a new CFO, and Avino president David Wolfin was positive in the original statement.
"Mr Davidson spent eight years with Avino and we wish him the best in his future endeavours" he said.
"He built a strong finance team which will manage the transition to a new CFO effectively."
Both companies will be considering internal and external candidates to fill the position, with corporate controller Nathan Harte acting as interim CFO.